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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| EA, ASJ-H | 2021-07-15 11:20 |
Online | Online | Beam Control Based on Multi-phased Array for Parametric Array Loudspeaker Yuting Geng, Haonan Wang (Ritsumeikan Univ.), Masato Nakayama (Osaka Sangyo Univ.), Takanobu Nishiura (Ritsumeikan Univ.)  EA2021-5 |
Parametric array loudspeaker (PAL) can achieve a super directivity utilizing the straightness of ultrasounds. How- ever,... [more] | EA2021-5 pp.24-29 |
| US | 2021-01-29 16:50 |
Online | Online | Proposal of method of reducing harmonic distortion for parametric loudspeakerby signal addition and its distance dependence Shumpei Harada, Hideyuki Nomura (UEC) US2020-64 |
Parametric loudspeakers are super-directional sound source with sharp directivity by utilizing the nonlinear interaction... [more] | US2020-64 pp.38-43 |
| EA, US (Joint) |
2020-01-22 14:00 |
Kyoto | Doshisha Univ. | [Poster Presentation]
Comparison of propagation phenomenon of ultrasound and secondary wave using numerical analysis of nonlinear acoustics
-- sound wave diffracting to occlusion area -- Motoharu Oyama, Kan Okubo (Tokyo Metropolitan Univ.) US2019-85 |
Feasibility of acoustic sensing for occlusion areas combining super-directivity speaker and pulse compression technique ... [more] | US2019-85 pp.83-87 |
| US | 2017-10-05 15:20 |
Miyagi | Pulse compression of parametric sound using M-sequence phase modulation Riku Nishioka, Hideyuki Nomura (UEC) US2017-61 |
The application of pulse compression to parametric ultrasound using chirp modulation have been proposed to realize low-f... [more] | US2017-61 pp.27-32 |
|
| US | 2017-04-27 10:55 |
Tokyo | Experimental evaluation of spatial resolution in low-frequency parametric ultrasound image Hideyuki Nomura (UEC) US2017-2 |
The penetration depth of high-frequency ultrasound is limited since the ultrasound at high frequency is much attenuated ... [more] | US2017-2 pp.5-10 |
|
| US | 2016-02-29 10:55 |
Tokyo | Instiute of Industrial Science, the University of Tokyo | Evaluation of penetration depth of parametric sound at difference frequency Ryosuke Suzuki, Hideyuki Nomura (UEC) US2015-109 |
The penetration depth becomes shallow because absorption by a medium viscosity is big for high frequency ultrasound used... [more] | US2015-109 pp.7-10 |
| US | 2015-11-09 14:50 |
Aichi | Nagoya Ekimae Office for Inovation hub, AIST | Improvement of SNR for pulse compressed parametric ultrasound Takayuki Honda, Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (UEC) US2015-69 |
Imaging used high frequency ultrasound is difficult at far distance because ultrasound is absorbed by medium with propag... [more] | US2015-69 pp.23-28 |
| US | 2015-09-04 09:30 |
Hokkaido | Feasibility of low-frequency ultrasound imaging using compressed parametric sound source Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (UEC) US2015-54 |
The penetration depth of high-frequency ultrasound is limited, since the ultrasound at high frequency is much attenuated... [more] | US2015-54 pp.47-50 |
|
| US | 2014-11-13 14:15 |
Ishikawa | Kanazawa Institute of Technology | Compressed parametric ultrasound imaging Junichi Naito, Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (UEC) US2014-60 |
This study is concerned with ultrasound images obtained from low frequency directive sound source with relatively high r... [more] | US2014-60 pp.11-15 |
| EA | 2014-06-27 13:30 |
Mie | Mie Univ. | An experimental study of optimum parameters in hybrid modulation based on amplitude and frequency with parametric loudspeaker for suitable speech reproduction Toru Iwasaki, Daisuke Ikefuji, Masato Nakayama, Takanobu Nishiura (Ritsumeikan Univ.) EA2014-6 |
Parametric loudspeaker with sharper directivity has been generally used for audio guidance to a specific listener. To em... [more] | EA2014-6 pp.7-12 |
| US | 2014-04-22 14:00 |
Tokyo | The University of Electro-Communications | Dependence of scatter size on pulse compressed parametric sound echo Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura, Gregory T. Clement (UEC) US2014-3 |
The purpose of our study is the application of pulse compressed parametric sound source, which forms a low frequency dir... [more] | US2014-3 pp.13-17 |
| EA, US (Joint) |
2014-01-27 14:15 |
Osaka | Kansai University, Centenary Memorial Hall | Distance measurement using parametric sound applied by pulse compression technique Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (UEC) US2013-89 |
This study is concerned with distance measurements using parametric sound applied by pulse compression technique to impr... [more] | US2013-89 pp.41-46 |
| US, EA (Joint) |
2013-01-24 13:10 |
Kyoto | Kambaikan, Doshisha Univ. | A study on reproduced area control based on separating emission of carrier and subband waves Masato Nakayama, Tadashi Matsui, Takanobu Nishiura (Ritsumeikan Univ.) US2012-92 EA2012-123 |
The parametric loudspeaker is ideal candidate to achieve audio system with the super high directivity by using ultrasoun... [more] | US2012-92 EA2012-123 pp.25-30 |
| US, EA (Joint) |
2013-01-24 17:50 |
Kyoto | Kambaikan, Doshisha Univ. | Application of pulse compression technique to parametric difference frequency sound Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (Univ. of Electro- Comm.), Gregory T. Clement (HMS) US2012-98 EA2012-129 |
Parametric difference frequency sound can propagate for long distance, because the energy dissipation of sound in a medi... [more] | US2012-98 EA2012-129 pp.59-62 |
| US | 2012-11-29 16:40 |
Shizuoka | Shizuoka Univ. | Compressed parametric ultrasound with chirp signal Hideyuki Nomura, Hideo Adachi, Tomoo Kamakura (UEC), Gregory T. Clement (HMS) US2012-79 |
The directivity of parametric difference frequency sound is narrower than that of linear sound with same frequency radi... [more] |
US2012-79 pp.51-56 |
| EA, SP, SIP | 2012-05-24 14:45 |
Osaka | Osaka Univ. Nakanoshima Center | An Evaluation of Demodulation for Parametric Loudspeaker based on Spectral Envelope Daisuke Ikefuji, Masato Nakayama, Masanori Morise, Takanobu Nishiura (Ritsumeikan Univ.) EA2012-13 SIP2012-13 SP2012-13 |
Parametric loudspeakers with sharper directivity can reproduce audible sounds to a particular area. Parametric loudspeak... [more] | EA2012-13 SIP2012-13 SP2012-13 pp.71-77 |
| EA, US (Joint) |
2012-01-26 14:15 |
Osaka | Kansai Univ. | Numerical simulation of parametric sound array and visualization of difference frequency beam generation Hideyuki Nomura, Tomoo Kamakura, Gregory T. Clement (UEC), Claes M. Hedberg (Blekinge Inst. of Tech.) US2011-91 EA2011-109 |
In order to understand the process of parametric sound generation, it is useful to capture instantaneous sound fields of... [more] | US2011-91 EA2011-109 pp.29-34(US), pp.31-36(EA) |
| US | 2011-11-24 16:15 |
Shizuoka | Tokai Univ. | Methods of Carrier Ultrasound Reducing of Parametric Loudspeaker Yoshiyuki Hara, Toshikazu Horino, Hideyuki Nomura, Tomoo Kamakura (UEC) US2011-75 |
A parametric loudspeaker using the self-demodulation of a finite-amplitude ultrasonic wave is promising for improving so... [more] | US2011-75 pp.53-58 |
| US | 2011-10-31 14:15 |
Yamanashi | University of Yamanashi | Extended High-frequency Audiometry under Presentation of Ultrasound Kan-ya Ito, Hideyuki Nomura, Tomoo Kamakura (UEC) US2011-61 |
Recently, many ultrasonic devices in industry and commercial use including parametric loudspeakers have been developed. ... [more] | US2011-61 pp.19-22 |
| US | 2011-04-28 13:25 |
Tokyo | The University of Electro-Communications | Estimation of sound field formed by parametric array using numerical simulation
-- Application to self-silenced sound beam -- Hideyuki Nomura (UEC), Claes M. Hedberg (BTH), Tomoo Kamakura (UEC) US2011-2 |
This study proposes a numerical calculation method that simulates a nonlinear propagation of ultrasound beams, estimatin... [more] | US2011-2 pp.7-12 |
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