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"Study on sound absorption characteristics of porous clay bricks"
Proc. 24th International Congress on Acoustics, Gyeongju, Korea, p7(2022. 10) Authors：Kana Ikeda, Reiji Tomiku, Noriko Okamoto, Toru Otsuru, Arisa Tabaru and Siwat Lawanwadeekul |
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"Application of three-dimensional pressure-velocity sensor to sound field of measurement for floor impact sound"
Proc. 24th International Congress on Acoustics, Gyeongju, Korea, pp.7(2022. 10) Authors：Taiki Kimura, Reiji Tomiku, Noriko Okamoto, Toru Otsuru and Atsuhide Kanazawa |
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"Numerical acoustic simulation of sound fields in corridor of the hospital ward"
Proc. 24th International Congress on Acoustics, Gyeongju, Korea, p6(2022. 10) Authors：Reiji Tomiku, Noriko Okamoto, Toru Otsuru, Yuto Kinjyo and Shoma Suzuki |
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"An Overview Of The Novel Measurement Method For Sound Absorption Characteristics Of Materials Using The Ensemble Averaging Technique"
Proc. 24th International Congress on Acoustics, Gyeongju, Korea, p5(2022. 10) Authors：Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Trial measurement of sound absorption characteristics of microperforated panel absorbers by in-situ measurement method using ensemble averaging technique"
Proc. 24th International Congress on Acoustics, Gyeongju, Korea, p5(2022. 10) Authors：Noriko Okamoto, Reiji Tomiku, Toru Otsuru, Arisa Tabaru and Kana Ikeda |
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"Measurement of acoustic energy density in rectangular reverberation chamber"
Proc. 24th International Congress on Acoustics, Gyeongju, Korea, p7(2022. 10) Authors：Satoshi Sugie, Kenichi Takebayashi, Yu Aida and Reiji Tomiku |
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"Calculation of statistical absorption coefficient using ensemble averaged surface normal impedance of material"
Proc. Inter-Noise2021, Washington, D.C., USA, pp.5578-5583(2021. 8) Authors：Noriko Okamoto, Toru Otsru, Reiji Tomiku, Masahiro Masuda, Arisa Tabaru |
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"Finite element sound field analysis on measurement of absorption coefficient in a reverberation room -Relationships between inclination of walls and measurement results-"
Proc. Inter-Noise2021, Washington, D.C., USA, pp.5571-5577(2021. 8) Authors：Reiji Tomiku, Noriko Okamoto, Toru Otsuru, Shun Iwamoto, Shoma Suzuki |
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"Trial applications at gymnasiums of in-situ sound absorption measurement method by ensemble averaging technique"
Proc. Inter-Noise2021, Washington, D.C., USA, pp.4532-4537(2021. 8) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Siwat Lawanwadeeku |
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"Comparison between ensemble averaged absorption characteristics of materials using an in-situ technique and those of conventional methods"
Proc. Inter-Noise2020, Seoul, Korea, p6(2020. 9) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku, Kaho Ito and Nobuyoshi Horiike |
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"Ensemble averaged absorption characteristics of materials using an in-situ technique: Investigations on influence of wind-induced noise"
Proc. Inter-Noise2020, Seoul, Korea, p6(2020. 9) Authors：Nobuyoshi Horiike, Noriko Okamoto, Toru Otsuru and Reiji Tomiku |
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"A discussion on the mechanism of sound absorption measurement method based on the ensemble averaging technique"
Proc. Inter-Noise2020, Seoul, Korea, p6(2020. 9) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Siwat Lawanwadeekul and Noriaki Sakamoto |
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"Finite element sound field analysis in rooms with curved surface"
Proc. Inter-Noise2020, Seoul, Korea, p6(2020. 9) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto and Shun Iwamoto |
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"In-situ sound absorption measurement method of materials using ensemble averaging: Comparison of proposed method with tube method or reverberation room method"
Proc. 23th International Congress on Acoustics, Aachen, Germany, p8(2019. 9) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku and Kaho Ito |
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"Advanced investigation using the EApu method on the effect of quantitation and particle size of charcoal in clay bricks on sound absorption coefficient"
Proc. 23th International Congress on Acoustics, Aachen, Germany, pp.1366-1372(2019. 9) Authors：Siwat Lawanwadeekul, Toru Otsuru, Reiji Tomiku and Hiroyasu Nisiguchi |
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"Sound absorption measurement method using ensemble averaging technique:A robust method for surface impedance including in-situ applications"
Proc. 23th International Congress on Acoustics, Aachen, Germany, p8(2019. 9) Authors：Toru Otsuru, Reiji Tomiku, Siwat Lawanwadeekul, Daiki Matsuka and Ryota Yoshimoto |
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"A trial application of sound absorption measurement method using ensemble averaging technique onto liquid water"
Proc. 13th Western Pacific Acoustic Conference, New Delhi, India, p6(2018.11) Authors：Toru Otsuru, Reiji Tomiku and Noriaki Sakamoto |
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"Prediction of sound energy incident on boundaries in non-deffuse sound field with unevenly-distributed sound absorbing surfaces by finite element method "
Proc. 13th Western Pacific Acoustic Conference, New Delhi, India, p6(2018.11) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto and Takuya Tahara |
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"A general overview of measurement method for sound absorption and surface impedance of materials using ensemble averaging"
Proc. 13th Western Pacific Acoustic Conference, New Delhi, India, p6(2018.11) Authors：Noriaki Sakamoto, Toru Otsuru, Reiji Tomiku, Shohei Okura, Daiki Matsuoka and Ryota Yoshimoto |
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"Absorption measurement method of materials by ensemble averaging: Application to absorption characteristics measurement of materials assuming construction condition"
Proc. 25th International Congress on Sound and Vibration, Hiroshima, Japan, pp.4339-4344(2018. 7) Authors：Noriko Okamoto, Reiji Tomiku and Toru Otsuru |
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"Computational investigation on measurement of reverberation time for the sound absorption coefficient in a reverberation room"
Proc. 25th International Congress on Sound and Vibration, Hiroshima, Japan, pp.4317-4322(2018. 7) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto and Ryo Ichikawa |
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"A fundamental discussion on boundary modeling by ensemble averaging for room acoustics simulations"
Proc. 25th International Congress on Sound and Vibration, Hiroshima, Japan, pp.4301-4308(2018. 7) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Saki Yamauchi, Noriaki Sakamoto and Naoki Takenaga |
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"Underwater sound field analysis in swimming pool by finite element method"
Proc. 25th International Congress on Sound and Vibration, Hiroshima, Japan, pp.4183-4190(2018. 7) Authors：Tsuguto Hoshino, Toru Otsuru and Reiji Tomiku |
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"Reproducibility of sound absorption and surface impedance of materials measured in a reverberation room by ensemble averaging technique using a pressure-velocity sensor"
Proc. 25th International Congress on Sound and Vibration, Hiroshima, Japan, pp.180-185(2018. 7) Authors：Noriaki Sakamoto, Toru Otsuru, Reiji Tomiku and Saki Yamauchi |
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"A synthesized boundary condition using ensemble averaged surface normal impedance for wave-based room acoustics simulations"
Proc. 24th International Congress on Sound and Vibration, London, p6(2017. 6) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Saki Yamauchi and Sakura Saigo |
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"Chicken feather: An alternative of acoustical materials"
Proc. 24th International Congress on Sound and Vibration, London, p6(2017. 6) Authors：Kusno Asniawaty, Masahiro Toyoda, Kimihiro Sakagami, Takeshi Okuzono, Toru Otsuru, Kusno Kamil and Vovi Masgode |
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"Flanking floor impact sound insulation in cross laminated timber model building for experiment"
Proc. Regional Conference on Acoustics and Vibration 2017, Bali, Indonesia, p6(2017.11) Authors：Toru Otsuru, Reiji, Tomiku, Noriko Okamoto, Emi Ueda and Asami Nakamura |
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"A general description of measurement method for sound absorption and surface impedance of materials using ensemble averaging"
Proc. Regional Conference on Acoustics and Vibration 2017, Bali, Indonesia, p6(2017.11) Authors：Noriaki Sakamoto, Toru Otsuru, Reiji Tomiku and Saki Yamauchi |
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"A discussion on impedance boundary conditions for room acoustics simulations measured by ensemble averaging method"
Proc. Inter-Noise 2017, Hong Kong, China, p6(2017. 8) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Saki Yamauchi and Sakura Saigo |
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"Finite element sound field analysis for reverberation time in non-diffuse sound field with unevenly-distributed sound absorbing surfaces"
Proc. Inter-Noise 2017, Hong Kong, China, p6(2017. 8) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto and Youtaro Kimura |
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"A discussion on the uncertainty of absorption characteristics measured by ensemble averaging technique for room acoustics simulations"
Proc. 22th International Congress on Acoustics, Buenos Aires, Argentina, p8(2016. 9) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Emi Ueda and Asami Nakamura |
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"Improvement of floor impact sound insulation in cross laminated timber model building for experiment"
Proc. Inter-Noise 2016, Hamburg, Germany, pp.5568-5573(2016.8) Authors：Atsuo Hiramitsu, Toru Otsuru, Reiji Tomiku and Koji Harada |
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"Acoustic absorption mapping: Wide-area estimation of acoustic absorption coefficient using airborne hyperspectral imagery"
Proc. Inter-Noise 2016, Hamburg, Germany, pp.1857-1864(2016. 8) Authors：Takuya Oshima, Kei Wakamatsu, Yasuhiro Hiraguri, Takeshi Okuzono, Reiji Tomiku, Noriko Okamoto and Toru Otsuru |
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"Numerical Study on Measurement Mechanism of Reverberation Time by Finite Element Sound Field Analysis in Rooms"
Proc. 12th Western Pacific Acoustic Conference, Singapore(2015.12) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto, Tsuyoshi Yoshida |
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"Modelling and Applications of Ensemble Averaged Surface Normal Impedance for Computational Room Acoustics Simulations"
Proc. 12th Western Pacific Acoustic Conference, Singapore, pp.105-109(2015.12) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Emi Ueda and Asniawaty Kusno |
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"Case Study on Sound Environment in Clubs for After School Activities for Children"
Proc. 12th Western Pacific Acoustic Conference, Singapore, pp.77-81(2015.12) Authors：Miki Toyomasu, Sayo Suzuki, Ruriko Mori |
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"Image processing technique for sound field analisis in rooms-basic investigations of introduction and calibrations of fish eye lens-"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2015, Nagasaki, Japan, No.227, pp.30-31(2015. 1) Authors：Takashi Takikawa, Toru Otsuru and Reiji Tomiku |
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"Study on termites control for buildings using vibro-acoustics signal-change of feeding activity of subterranes termites by adding band noise to wooden blocks-"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2015, Nagasaki, Japan, No.225, pp.108-111(2015. 1) Authors：Yuta Katsuyama, Toru Otsuru and Reiji Tomiku |
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"Reproducibility of in-situ measurement method using ensemble averaging technique applied onto reflective materials"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2015, Nagasaki, Japan, No.226, pp.157-160(2015. 1) Authors：Emi Ueda, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Computer simulation and modeling techniques of sound fields for sustainable environmental architecture"
International Conferences on 15th SENVAR and 2nd AVAN, Keynote Lecture, p10(2014.11) Author：Toru Otsuru |
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"Absorption modeling with ensemble averaged impedance for wave-based room acoustics simulations"
Proc. Inter-Noise 2014, Melbourne, Australia, p6(2014.11) Authors：Toru Otsuru, Reiji Tomiku and Takeshi Okuzono |
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"Finite element sound field analysis for correction of absorption coefficient in reverberation room"
Proc. Inter-Noise 2014, Melbourne, Australia, p6(2014.11) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto, Takeshi Okuzono, Yoshiki Azechi and Tsuyoshi Yoshida |
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"Application of an in-situ measurement method using ensemble averaging technique to material development"
Proc. Inter-Noise 2014, Melbourne, Australia, p6(2014.11) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku, Takaaki Kamimizu, Makoto Yamaguchi and Takeshi Okuzono |
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"An explicit time-domain finite-element method for room acoustics simulation"
Proc. Inter-Noise 2014, Melbourne, Australia, p6(2014.11) Authors：Takeshi Okuzono, Toru Otsuru and Kimihiro Sakagami |
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"Relationship between dispersion error and accuracy of room acoustics parameter in time-domain finite-element room acoustics simulation"
Proc. Inter-Noise 2013, Innsbruck, Austria, No.570, p8(2013. 9) Authors：Takeshi Okuzono, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Humidity effect on pressure-velocity sensor examined in sound absorption measurement with ensemble averaging technique"
Proc. Inter-Noise 2013, Innsbruck, Austria, No.467, p7(2013. 9) Authors：Toru Otsuru, Asniawaty Kusno, Reiji Tomiku, Takeshi Okuzono, Noriko Okamoto and Nazli Bin Che Din |
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"Study on termite control for buildings using vibro-acoustic signals"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2013, Busan, Korea, No.215, pp.89-92 (2013. 1) Authors：Chiaki Hara, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"An application of in-situ measurement method using ensemble averaging onto resonator-type absorbers installed in practical rooms"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2013, Busan, Korea, No.214, pp.84-87 (2013. 1) Authors：Kazuki Nakano, Toru Otsuru, Keiji Kawai, Reiji Tomiku, Noriko Okamoto and Takeshi Okuzono |
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"Image processing technique for sound field analysis in rooms"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2013, Busan, Korea, No.211, pp.53-56 (2013. 1) Authors：Tomohiro Oda, Toru Otsuru, Reiji Tomiku and Takeshi Okuzono |
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"Stability examination on pressure velocity sensor by absorption coefficient of ensemble averaging method-Effect of humidity and time parameters-"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2013, Busan, Korea, No.213, pp.28-31(2013. 1) Authors：Asniawaty Kusno, Toru Otsuru, Reiji Tomiku, Takeshi Okuzono and Kazuki Nakano |
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"Large-scale finite element sound field analysis of rooms using a practical boundary modeling technique"
Proc. 19th International Congress on Sound and Vibration, Vilnius, Lithuania, No.632, 8p(2012. 7) Authors：Toru Otsuru, Takeshi Okuzono, Reiji Tomiku, Noriko Okamoto and Asniawaty Kusno |
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"Finite element analysis of sound field for a measurement of the reverberation room method absorption coefficient"
Proc. 5th International Building Physics Conference, Kyoto, Japan, pp.1093-1099(2012. 5) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto, Takeshi Okuzono and Asniawaty Kusno |
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"Applications of large-scale finite element sound field analysis onto a music hall using ensemble averaged surface normal impedance"
ACOUSTICS 2012, Hong Kong, Japan, 1pAA11(2012. 5) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Takeshi Okuzono and Asniawaty Kusno |
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"Humidity effect onto measurement of ensemble averaged surface normal impedance of materials using combination of microphone and particle velocity sensor"
Proc. Inter-Noise 2011, Osaka, Japan, No.435902(2011. 9) Authors：Asniawaty Kusno, Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Nazli che din and Hiroaki Nakano |
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"Development of practical system for prediction the absorption coefficients, dimensions and reverberation time of classroom using photo image and feed-forward neural network"
Proc. Inter-Noise 2011, Osaka, Japan, No.435826(2011. 9) Authors：Musli nizam bin yahya, Toru Otsuru, Reiji Tomiku and Takeshi Okuzono |
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"Finite element sound field analysis in a reverberation room using ensemble averaged surface normal impedance"
Proc. Inter-Noise 2011, Osaka, Japan, No.435672(2011. 9) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto, Takeshi Okuzono and Takahiro Shibata |
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"Basic study on vibration signal role in feeding activity on subterranean termites Coptotermes formosanus -Realationship between vibration signals and feeding activity-"
Proc. Inter-Noise 2011, Osaka, Japan, No.435554(2011. 9) Authors：Masuoh Fukada, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Applications of finite element sound field analysis using ensemble averaged surface normal impedance measured in-situ"
Proc. Inter-Noise 2011, Osaka, Japan, No.434659(2011. 9) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Takeshi Okuzono, Kusno Asniawaty, Chihiro Ueki and Nazli bin che din |
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"Ensemble averaged absorption characteristics of materials using an in-situ technique :An investigation on the resonance-type sound absorbing materials"
PrProc. Kyushu-Youngnam Joint Conference on Acoustics 2011, Kumamoto, Japan, pp.35-38(2011. 1) Authors：Rei Matsumoto, Toru Otsuru, Reiji Tomiku, and Noriko Okamoto |
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"Basic study on vibration signal role in foraging activity on subterranean termites Coptotermes formosanus"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2011, Kumamoto, Japan, pp.189-192(2011. 1) Authors：Masuou Fukada, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Basic investigation on boundary shape modeling for sound field analysis of rooms using time domain finite element method"
Proc. 20th International Congress on Acoustics, p823, 5p(2010. 8) Authors : Takeshi Okuzono, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Naoya Kitamura |
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"An in-situ technique for extensive field measurements of absorption characteristics of materials by using ensemble averaging"
Proc. 20th International Congress on Acoustics, p820, 5p(2010. 8) Authors : Nazli bin Che Din, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Asniawaty Kusno |
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"Reverberation times prediction on classroom using neural network model"
Proc. 20th International Congress on Acoustics, p337, 5p(2010. 8) Authors : Musli Nizam bin Yahya, Toru Otsuru, Reiji Tomiku, Takeshi Okuzono and Toshiki Nagasawa |
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"Ensemble averaged surface normal impedance measured in-situ; a trial application onto finite element sound field analysis"
Proc. Inter-Noise 2010, Lisbon, Portugal, No.899, 10p(2010. 6) Authors : Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Takeshi Okuzono, Kusno Asniawaty, Nazli Che Din and Chihiro Ueki |
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"Ensemble averaged absorption characteristics of materials using an in-situ technique : a basic application on helmholtz resonator"
Proc. Inter-Noise 2010, Lisbon, Portugal, No.674, 7p(2010. 6) Authors : Rei Matsumoto, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Measurement of the Sound Absorption Characteristics of Materials using In-Situ Technique: Ensemble Averaged Surface Normal Impedance Method"
Proc. 3rd International Conference on Noise, Vibration and Comfort, Putrajaya, Malaysia, NVC10-58(2010. 6) Authors：Nazli bin Che Din, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"The effects of geometrical configuration onto measuring ensemble averaged surface normal impedance"
Proc. 17th International Congress on Sound and Vibration, Cairo, Egypt, No.575, 8p(2010. 7) Authors：Nazli Che Din, Toru Otsuru, Reiji Tomiku, and Noriko Okamoto |
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"An application of ensemble averaged surface normal impedance measurement method in-situ - A trial finite element computation using measured impedance -"
Proc. 17th International Congress on Sound and Vibration, Cairo, Egypt, No.578, 8p(2010. 7) Authors：Asniawaty Kusno, Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Nazli Che Din and Chihiro Ueki |
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"A review on development of in situ measurement technique of material surface normal impedance by using environment anonymous noise"
Proc. International Conference on Building Science and Engineering, Johor Bahru, Malaysia, BSE03-014(2009.12) Authors：Nazli bin Che Din, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Kikkawa Yuka |
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"Investigation the capability of neural network in predicting reverberation time on classroom"
Proc. International Conference on Building Science and Engineering, Johor Bahru, Malaysia, BSE03-012(2009.12) Authors：Musli Nizam bin Yahaya, Toru Otsuru, Reiji Tomiku and Takeshi Okuzono |
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"Recent Activities for developing computational methods on environmental acoustics and sustainable built environment"
Proc. International Conference on Building Science and Engineering, Johor Bahru, Malaysia(2009.12) Author：Toru Otsuru |
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"Large-scale finite element sound field analysis of rooms with ensemble averaged impedance and 3D laser scanner modeling"
Proc. 10th Western Pacific Acoustic Conference, Beijing, China, No.0241, 8p(2009. 9) Authors：Toru Otsuru, Takeshi Okuzono, Reiji Tomiku, Noriko Okamoto and Tatsuya Imai |
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"Time domain finite element analysis for coupled rooms separated by an elastic plate"
Proc. 10th Western Pacific Acoustic Conference, Beijing, China, No.0266, 8p(2009. 9) Authors：Andora Suwisto, Toru Otsuru, Reiji Tomiku, Takeshi Okuzono and Chihiro Ueki |
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"Accuracy and efficiency of time domain finite element method for sound field analysis of rooms"
Proc. Inter-Noise 2009, Ottawa, Canada, in09_756(2009. 8) Authors：Takeshi Okuzono, Toru Otsuru, Reiji Tomiku and Noriko Okamoto |
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"Settings for measuring ensemble averaged surface normal impedance"
Proc. Inter-Noise 2009, Ottawa, Canada, in09_766(2009. 8) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Nazli bin Che Din and Asniawaty Kusno |
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"Ensemble Averaged Surface Normal Impedance of Material-Preliminary Investigation of Edge Effect using BEM-"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2009, Andong, Korea, pp. 25-28(2009, 2) Authors：Nazli Che Din, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Yuka Kikkawa |
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"Vibration Signal Role in Food Size Preference on Japanese Termites Coptotermes formosanus"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2009, Andong, Korea,pp. 9-12(2009, 2) Authors：Andora Suwisto, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Wakana Maeda |
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"In-situ measurement method of ensemble averaged impedance and absorption characteristics of materials at field incidence using p-v or p-p sensors"
Proc. Inter-Noise 2008, Shanghai, China, No. 0517(2008. 10) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Masahiko Murakami, Fuminori Kutsukake and Nazli Che Din |
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"Speedup of Time Domain Finite Element Sound Field Analysis of Rooms"
Proc. Inter-Noise 2008, Shanghai, China, No. 0877(2008. 10) Authors：Takeshi Okuzono, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Toshifumi Minokuchi |
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"A Trial Application of In-situ Measurement Impedance to a Room Acoustic Improvement by Finite Element Sound Field Analysis"
Proc. Inter-Noise 2008, Shanghai, China, No. 0878(2008. 10) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku, Takeshi Okuzono and Kouta Isobe |
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"Comparison of calculation accuracy between time domain finite element method and finite difference time domain method for room acoustic problems"
Proc. Inter-Noise 2008, Shanghai, China, No. 0882(2008. 10) Authors：Kazuma Hoshi, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Takeshi Okuzono |
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"Convergence characteristics of BiCG and CGS methods for finite element sound field analysis of rooms with an elastic plate"
Proc. International Kyoto-Forum on Krylov Subspace method, Kyoto, Japan, pp.129-134(2008. 9) Authors：Takeshi Okuzono, Toru Otsuru, Seiji Fujino, Reiji Tomiku, Noriko Okamoto and Andora Suwisto |
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"Direct and modal frequency response analysis of sound fields in small rooms by finite element method"
Proc. Acoustics '08 Paris, Paris, France(2008. 6) Authors：Reiji Tomiku, Toru Otsuru, Noriko Okamoto and Yuka Kurogi |
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"Accuracy of direct frequency response analysis in sound field of a cavity using finite element method by comparison with modal frequency response analysis"
Proc. 19th International Congress on Acoustics, Madrid, Spain, COM-05-003(2007. 9) Authors：Toru Otsuru, Noriko Okamoto, Takeshi Okuzono, Takayuki Kondo and Yuka Kurogi |
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"Applications of large-scale finite element sound field analysis onto room acoustics"
Proc. 19th International Congress on Acoustics, Madrid, Spain, RBA-05-009(2007. 9) Authors：Toru Otsuru, Noriko Okamoto, Takeshi Okuzono and Toshihide Sueyoshi |
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"Time domain large-scale finite element sound field analysis of a multi-purpose hall"
Proc. 14th International Congress on Sound and Vibration, Cairns, Australia(2007. 7) Authors：Toru Otsuru, Takeshi Okuzono, Noriko Okamoto, Kota Isobe and Hiroshi Furuya |
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"Large-scale finite element sound field analysis with impedance values measured in-situ"
Proc. The Japan-China Joint Conference on Acoustics 2007, Sendai, Japan(2007. 6) Authors：Toru Otsuru, Noriko Okamoto, Takeshi Okuzono, Masanori Murakami and Takafumi Kutsukake |
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"Preformance of iterative methods for large-scale time domain finite element sound field analisis of rooms"
Proc. The Japan-China Joint Conference on Acoustics 2007, Sendai, Japan(2007. 6) Authors：Takeshi Okuzono, Toru Otsuru, Noriko Okamoto and Toshihide Sueyoshi |
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"Comparison detween direct analisis and modal analisis in sound field analisis of rooms by finite element method"
Proc. The Japan-China Joint Conference on Acoustics 2007, Sendai, Japan(2007. 6) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku, Takeshi Okuzono and Takayuki Kondo |
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"Trial applications of simulations based on geometrical or wave-acoustics onto a multipurpose hall"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2007, Kyushu, Japan, pp.111-114(2007. 1) Authors：Kota Isobe, Toru Otsuru, Noriko Okamoto and Toshihide Sueyoshi |
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"In situ measurements of absorption characteristics of weakly absorbing materials using ambient noise with two microphones or a combined particle velocity-pressure sensor"
Proc. Kyushu-Youngnam Joint Conference on Acoustics 2007, Kyushu, Japan, pp.107-110(2007. 1) Authors：Fuminori Kutsukake, Toru Otsuru, Noriko Okamoto and Masahiko Murakami |
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"Time domain finite element sound field analysis of rooms using iterative methods and parallelization"
Proc. Inter-Noise 2006, Honolulu, Hawaii, USA(2006.12) Authors：Takeshi Okuzono, Toshihide Sueyoshi, Toru Otsuru, Noriko Okamoto and Reiji Tomiku |
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"Accuracy of large-scale finite element sound field analysis in rooms by use of a benchmark platform"
Proc. Inter-Noise 2006, Honolulu, Hawaii, USA(2006.12) Authors：Noriko Okamoto, Reiji Tomiku, Toru Otsuru, Takeshi Okuzono and Yosuke Yasuda |
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"Impedance measurement of materials by use of ambient noise for computational acoustics"
Proc. Inter-Noise 2006, Honolulu, Hawaii, USA(2006.12) Authors：Toru Otsuru, Noriko Okamoto, Reiji Tomiku, Takeshi Okuzono and Yasuo Takahashi |
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"Comparison of sound fields in rooms computed by finite-element method and by cone beam method"
Proc. The Fourth Joint Meeting ASA and ASJ, Honolulu, Hawaii, USA, 1pAA11, p.3010(2006.11) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku, Takeshi Okusono, Kota Isobe and Hiroshi Furuya |
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"Applications of large-scale finite-element sound-field analysis utilizing Architectural Institute of Japan-benchmark platform"
Proc. The Fourth Joint Meeting ASA and ASJ, Honolulu, Hawaii, USA, 1pAA2, p.3009(2006.11) Authors：Toru Otsuru, Noriko Okamoto and Takeshi Okuzono |
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"Performance of iterative methods and acceleration of computation for large-scale finite element sound field analysis in rooms"
Proc. 9th Western Pacific Acoustics Conference, Seoul, Korea(2006. 6) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku and Takeshi Okuzono |
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"Finite element sound field analysis using AIJ-benchmark platform"
Proc. 9th Western Pacific Acoustics Conference, Seoul, Korea(2006. 6) Authors：Toru Otsuru, Noriko Okamoto, Reiji Tomiku and Takeshi Okuzono |
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"Finite Element Sound Field Analysis for A Measurement of An Averaged Sound Pressure Levels in Rooms"
Proc. Inter-Noise 2005, Rio de Janeiro, Brazil(2005. 8) Authors：Reiji Tomiku and Toru Otsuru |
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"Largescale Finite Element Sound Field Analysis, Design and Scientific Tool for Room Acoustics"
Proc. Inter-Noise 2005, Rio de Janeiro, Brazil(2005. 8) Authors：Toru Otsuru, Noriko Okamoto, Reiji Tomiku, Daisuke Azuma and Koichi Yamamura |
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"Basic Accuracy and Application of Large-scale Finite Element Sound Field Analysis on Architectural Acoustics"
Proc. 12th International Congress on Sound and Vibration, Lisbon, Portugal(2005. 7) Authors：Toru Otsuru, Noriko Okamoto, Reiji Tomiku, Daisuke Azuma and Koichi Yamamura |
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""Relationships between Sound Fields and Convergence Characteristics of Iterative Methods in Finite Element Sound Field Analysis of Rooms"
Proc. Inter-Noise 2004, Prague, Czech Republic(2004. 8) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku and Takeshi Okuzono |
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"Investigation on Averaged Sound Pressure Levels in Rooms by Finite Element Sound Field Analysis"
Proc. Inter-Noise 2004, Prague, Czech Republic(2004. 8) Authors：Reiji Tomiku, Toru Otsuru and Daisuke Azuma |
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"Investigations on the Measurement Method of Room Impulse Responses"
Proc. International Symposium on Room Acoustics : Design and Science 2004, Hyogo, Japan(2004. 4) Authors：Yuki Uchinoura, Toru Otsuru, Reiji Tomiku and Midori Yamamoto |
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"Basic Investigations on Preconditioning for Large-scale Sound Field Analysis by Finite Element Method with Iterative Methods"
Proc. International Symposium on Room Acoustics : Design and Science 2004, Hyogo, Japan(2004. 4) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku and Midori Fukuda |
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"Comparison between Diffuseness of Sound Fields in Reverberation with and without Absorption Material by Finite Element Method"
Proc. International Symposium on Room Acoustics : Design and Science 2004, Hyogo, Japan(2004. 4) Authors：Reiji Tomiku, Toru Otsuru, Yasuo Takahashi and Daisuke Azuma |
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"Activities for Constructing Database on Computational Methods for Environmental Acoustics"
Proc. International Symposium on Room Acoustics : Design and Science 2004, Hyogo, Japan(2004. 4) Authors：Toru Otsuru, Tetsuya Sakuma and Shinichi Sakamoto |
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"Investigations on Performance of Iterative Solvers for Large-scale Sound Field Analysis by Finite Element Method"
Proc. 18th International Congress on Acoustics, Kyoto, Japan, pp.III 2367-III 2368(2004. 4) Authors：Noriko Okamoto, Toru Otsuru, Reiji Tomiku and Midori Fukuda |
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"A Computational Investigation on Measurements in Reverberation Rooms by Finite Element Sound Field Analysis"
Proc. 18th International Congress on Acoustics, Kyoto, Japan, pp.II 941-II 942(2004. 4) Authors：Reiji Tomiku, Toru Otsuru, Yasuo Takahashi and Daisuke Azuma |
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"Basic Concept, Accuracy and Application of Large-scale Finite Element Sound Field Analysis of Rooms"
Proc. 18th International Congress on Acoustics, Kyoto, Japan, pp.I 479-I 482(2004. 4) Authors：Toru Otsuru, Yuki Uchinoura, Reiji Tomiku, Noriko Okamoto and Yasuo Takahashi |
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"A Benchmarking Framework for Wave-based Computational Methods in Architectural Acoustics"
Proc. 18th International Congress on Acoustics, Kyoto, Japan, pp.I 281-I 284(2004. 4) Authors：Tetsuya Sakuma, Shinichi Sakamoto and Toru Otsuru |
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"A Study on Sound Environment in Hospitals"
Proc. 18th International Congress on Acoustics, Kyoto, Japan, pp.I 273-I 276(2004. 4) Authors：Miki Toyomasu, Toru Otsuru and Noriko Okamoto |
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"A computational investigation on diffuseness of sound fields in testing rooms for ISO by finite element method"
Proc. Inter-Noise 2003, Jeju, Korea, pp.1119-1126(2003. 8) Authors：Reiji Tomiku, Toru Otsuru and Yasuo Takahashi |
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"Large-scale sound field analysis of architectural rooms by FEM with CG-like method"
Proc. Inter-Noise 2003, Jeju, Korea, pp.1111-1118(2003. 8) Authors：Toru Otsuru, Noriko Okamoto, Reiji Tomiku and Midori Fukuda |
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"Accuracy of large-scale finite element sound field analysis of rooms"
Proc. 8th Western Pacific Acoustics Conference, Melbourne, Australia(2003. 4) Authors：Toru Otsuru, Reiji Tomiku and Yasuo Takahashi |
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"An In Situ Technique for Measuring Absorption Characteristics of Mmaterials Using Two Microphones and Environmental Anonymous Noise"
Proc. 8th Western Pacific Acoustics Conference, Melbourne, Australia(2003. 4) Authors：Yasuo Takahashi, Toru Otsuru and Reiji Tomiku |
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"Investigation on Diffuseness of Sound Fields in Reverberation Rooms Using Large Scale Sound Field Analysis by Finite Element Method"
Proc. 8th Western Pacific Acoustics Conference, Melbourne, Australia(2003. 4) Authors：Reiji Tomiku, Toru Otsuru, Yasuo Takahashi and Yuki Uchinoura |
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"An efficient impedance and absorption coefficient measurement technique for digital simulations by using environmental anonymous noise"
Technical Acoustics Vol. 21, pp.263-266(2002.10) Authors：Yasuo Takahashi, Toru Otsuru and Reiji Tomiku |
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"Large-scale sound field analysis of a music hall by the finite element method""
Technical Acoustics (Invited) Vol. 21, pp.255-258(2002.10) Authors：Toru Otsuru, Reiji Tomiku, Yasuo Takahashi and Miki Toyomasu |
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"Large Scale Sound Field Analysis by Finite Element Method Applied onto Rooms with Temperature Distribution"
Proc. 9th International Congress on Sound and Vibration, Orlando, USA(2002. 7) Authors：Toru Otsuru, Reiji Tomiku, Yasuo Takahashi and Miki Toyomasu |
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"A Study on Acoustic Environment at Outpatient Departments in Hospitals"
Proc. 9th International Congress on Sound and Vibration, Orlando, USA(2002. 7) Authors：Miki Toyomasu, Toru Otsuru, Reiji Tomiku, Yasuo Takahashi, Noriko Okamoto, Yuki Uchinoura and Miho Imoto |
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"Computational Investigation on Spatial Cross-Correlation of Sound Pressure in the Reverberation Rooms Using Finite Element Analysis of Sound Field"
Proc. 9th International Congress on Sound and Vibration, Orlando, USA(2002. 7) Authors：Reiji Tomiku, Toru Otsuru and Yasuo Takahashi |
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"IN SITU Measurement of Absorption Characteristics of Materials Using Environmental Anonymous Noise"
Proc. 9th International Congress on Sound and Vibration, Orlando, USA(2002. 7) Authors：Yasuo Takahashi, Toru Otsuru and Reiji Tomiku |
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"Acoustic Environments in Outpatient Department in Hospitals"
Proc. 8th International Congress on Sound and Vibration, Hong Kong, China, pp.837-844(2001. 7) Authors：Miki Toyomasu, Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Yuki Uchinoura |
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"Investigation on Diffusion of Sound Fields in Reverberation Rooms by Finite Element Method"
Proc. 8th International Congress on Sound and Vibration, Hong Kong, China, pp.773-780(2001. 7) Authors：Reiji Tomiku, Toru Otsuru, Yasuo Takahashi and Kenshi Tanaka |
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"Finite Element Sound Field Analysis of Rooms in Built Environment"
Proc. 8th International Congress on Sound and Vibration, Hong Kong, China, pp.765-772(2001. 7) Authors：Toru Otsuru, Reiji Tomiku, Miki Toyomasu and Yasuo Takahashi |
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"Finite Element Analysis of Diffusion in the Reverberation Rooms"
Proc. 7th Western Pacific Acoustics Conference, Kumamoto, Japan, pp.1013-1016(2000.10) Authors：Reiji Tomiku, Toru Otsuru and Noriko Okamoto |
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"Basic Study on Acoustic Environments in Outpatient Department in Hospitals"
Proc. 7th Western Pacific Acoustics Conference, Kumamoto, Japan, pp.839-842(2000.10) Authors：Miki Toyomasu, Toru Otsuru and Noriko Okamoto |
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"Accuracy of Finite Element Sound Field Analysis of An Irregular Shaped Reverberation Room"
Proc. 7th International Congress on Sound and Vibration, Garmish-Partenkirchen, Germany, pp.2093-2100(2000. 7) Authors：Toru Otsuru, Reiji Tomiku, Noriko Okamoto and Yousuke Ichikawa |
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"Finite Element Analysis of Diffusion in An Irregular Shaped Reverberation Room"
Proc. 7th International Congress on Sound and Vibration, Garmish-Partenkirchen, Germany, pp.1717-1724(2000. 7) Authors：Reiji Tomiku, Toru Otsuru and Noriko Okamoto |
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"Accuracy of Dissipation Models in the Finite Element Sound Field Analysis of Rooms with Absorptive Materials"
Proc. Inter-Noise '99, Florida, USA, pp.1663-1666(1999.12) Authors：Toru Otsuru and Reiji Tomiku |
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"Sound Field Analysis by Finite Element Method on An Irregular-Shaped Reverberation Room"
Proc. INSTITUT TEKNOLOGI BANDUNG, Vol. 31, No. 2, pp.107-114(1999.11) Authors：Toru Otsuru, Reiji Tomiku and Purnomo |
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"Modeling and Accuracy of Sound Field Analysis by Finite Element Method on Building Environments"
Proc. Building Simulation '99, Kyoto, pp.1375-1382(1999. 9) Authors：Toru Otsuru and Reiji Tomiku |
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"Sound transmission analysis through elastic plates by a finite elemental procedure"
Proc. 6th International Congress on Sound and Vibration, Lyngby, pp.611-618(1999. 7) Authors：Toru Otsuru, Purnomo, Reiji Tomiku and Kenshi Tanaka |