CiNii Articles - Sound and Acoustics

1

The Annual Variability of Density and Sound-Speed Contrasts and Their Influence on Target Strength of Euphausia pacifica off the Coast of Kushiro, Hokkaido [in Japanese]

福田美亮 , 向井徹 , 澤田浩一

海洋音響学会誌 = The journal of the Marine Acoustics Society of Japan 48(1), 1-14, 2021-01
2

On effect of inlet tube on attenuation of expanded silencer [in Japanese]

ISHIHARA Kunihiko , KOBAYASHI Kei

… An expanded silencer is well known in all other silencers and widely used in an industry field. … As the theory of the expanded silencer has already been established and it is considered to be useful because it has exceptional prospects. … In general, the performance of silencers is evaluated by the silencing effect(ATT) and insertion loss(IL). … This is considered to be natural and almost all people know that fact. …

Transactions of the JSME (in Japanese), 2021

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3

TDOA Measurement Algorithm Resistant to Multipath Interference in Estimating Direction of Arrival of Underwater Sound Source [in Japanese]

Takada Keisaku , Yoshizawa Shingo

… In this paper, we propose a time difference of arrival (TDOA) measurement algorithm resistant to multipath interference in estimating direction of arrival (DOA) of an underwater sound source. … In strong multipath interference, the pseudo-peaks caused by reflected affect the correlation function, which makes it difficult to detect the peak with correct time position and leads to a large TDOA measurement error. …

Journal of Signal Processing 25(1), 33-42, 2021

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4

Seeking to understand the auditory processing mechanisms of speech and spatial sound [in Japanese]

平原達也

聴覚研究会資料 = Proceedings of the auditory research meeting 50(6), 419-424, 2020-11-20
5

A basic study with respect to position of a bridge and acoustics of performance sound in Nagauta Shamisen [in Japanese]

岩﨑愛 , 三浦雅展

音楽音響研究会資料 39(6), 99-104, 2020-10-24
6

The Effect of Deviation Due to the Manufacturing Accuracy in the Parameters of an MPP on Its Acoustic Properties: Trial Production of MPPs of Different Hole Shapes Using 3D Printing

Sakagami Kimihiro , Kusaka Midori , Okuzono Takeshi , Nakanishi Shinsuke

… In this study, we discuss the effect of the manufacturing accuracy of a microperforated panel (MPP) produced by 3D printers on acoustic properties through measured and calculated results as a pilot study. … Considering this situation, in this pilot study, we attempted to produce MPPs with circular and rectangular perforations using a consumer 3D printer of the additive manufacturing type. … The hole sizes of the specimens were measured, and the accuracy was evaluated. …

Acoustics 2(3), 605-616, 2020-09

IR
7

A RESEARCH ON AUDITORY COGNITION AND PERFORMANCE BEHAVIOR OF PIANO PLAYERS FROM THE VIEWPOINT OF THE PROFICIENCY PROCESS OF A MUSIC PIECE (PART 1): CLASSIFICATION OF THE PROFICIENCY LEVEL AND CAUSALITY ANALYSIS ON PRACTICE, PERFORMANCE BEHAVIOR AND CONSCIOUSNESS OF THE SOUND FIELD [in Japanese]

MATSUO Ayako , AKITA Takeshi , KOJIMA Takaya , SANO Naoko , YU Hanui

… Many of the previous studies in the fields of architectural acoustics concerning concert hall have mainly focused on examination and evaluation of better acoustic characteristics by the audience. … On the other hand, several studies have been made from the viewpoint of evaluating sonic field by music players in the field of architectural acoustics associated with music performance. …

Journal of Environmental Engineering (Transactions of AIJ) (774), 557-567, 2020-08

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8

Sound Design for Automobiles in the Future [in Japanese]

山内勝也

自動車技術 = Journal of Society of Automotive Engineers of Japan 74(7), 63-67, 2020-07
9

Application of Paper Folding Technique to Three-Dimensional Space Sound Absorber with Permeable Membrane: Case Studies of Trial Productions

Sakagami Kimihiro , Okuzono Takeshi , Suzuki Hirotaka , Koyanagi Nao , Toyoda Masahiro

… The authors propose a space sound absorber made of a permeable membrane (PM), including woven or nonwoven fabrics in three-dimensional shapes, e.g., cylinder, rectangle, etc. … The proposed absorbers are examined by experimental measurements and boundary element analyses, and it is found that they can be effectively used especially for middle and high frequencies. …

International Journal of Acoustics and Vibration 25(2), 243-247, 2020-07

IR
10

Time-domain Sound Field Analysis Considering Sound Absorption Effect using Boundary Element Method [in Japanese]

庄子諒 , 吉川仁 , 樫山和男

計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science 25, 4p, 2020-06
11

Potential of Room Acoustic Solver with Plane-Wave Enriched Finite Element Method

Okuzono Takeshi , Mohamed M. Shadi , Sakagami Kimihiro

… Predicting room acoustics using wave-based numerical methods has attracted great attention in recent years. … Nevertheless, wave-based predictions are generally computationally expensive for room acoustics simulations because of the large dimensions of architectural spaces, the wide audible frequency ranges, the complex boundary conditions, and inherent error properties of numerical methods. …

Applied Sciences 10(6), 1969, 2020-03

IR
12

A Preliminary Study on Singing Education in Music Education in School: Focusing on Frederick Husler's thoughts on Anzatz [in Japanese]

長友洋喜 , Hiroki Nagatomo

… First, Husler points out voice cannot be placed somewhere on a body, for voice is a kind of sound, and sound cannot remain somewhere. … For Husler, sound cannot be placed from a viewpoint of physics or acoustics. … He refers to his rich knowledge about anatomic, and describes in detail how each vocal organs moves. …

安田女子大学紀要 = Journal of Yasuda Women's University (48), 209-218, 2020-02-28

IR DOI
13

Comparison of propagation phenomenon of ultrasound and secondary wave using numerical analysis of nonlinear acoustics : Sound wave diffracting to occlusion area [in Japanese]

大山元春 , 大久保寛

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 119(374), 83-87, 2020-01-22
14

Assessing the ease of conversation in multi-group conversation spaces : Effect of background music volume on acoustic comfort in a café

Maruyama Naoya , Hiraguri Yasuhiro , Kawai Keiji , Ueda Mari

… A "multi-group conversation space" refers to a space, such as restaurant or café, where more than one group of people share a space and make conversation within their respective group. … From a field experiment in an actual café, we investigated the acoustic comfort in a multi-group conversation space considering speech intelligibility and speech privacy as major factors. … In the experiment, noise measurements and a questionnaire survey taken by customers were conducted for 4 days. …

Building Acoustics, 2020-01-10

IR
15

Environmental Impact Assessment of Sound Impacts : Lessons Learned from Europe and Beyond (2019-1 Symposium Abstract)

THOMSEN Frank

海洋音響学会誌 = The journal of the Marine Acoustics Society of Japan 47(1), 26-32, 2020-01
16

Doctoral Dissertation : Studies on Doppler Shift Equation Considering Spatial Variation of Speed of Sound and Its Applications [in Japanese]

田中正吉

海洋音響学会誌 = The journal of the Marine Acoustics Society of Japan 47(1), 9-25, 2020-01
17

Measurements of Sound Velocities for Materials of Acoustic Lenses Mounted on Underwater Vessels: Temperature-Dependence for Syntactic Form and Flourinart [in Japanese]

MORI Kazuyoshi , OGASAWARA Hanako

… These lenses were composed with solid lenses faced to sea water, and inner liquids placed in the AUV's bow. … In this study, we measured the temperature-dependences of three Syntactic foams (TG-26/3000, TG-28/4000, TG-39/11500) for solid lens, and of Fluorinert (FC-72) for inner liquid, in order to select suitable materials to the convex lens. … The results of tank experiments showed that the sound velocities decrease with increasing temperature, for all materials. …

The Journal of the Marine Acoustics Society of Japan 47(4), 129-138, 2020

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18

Study on sound pressure level and acoustic damping ratio of one dimensional sound field partitioned by perforated plate with geometric similarity [in Japanese]

ISHIHARA Kunihiko

… In heat exchangers like a boiler, as a tube bank is set in a duct the alternative vortices occur behind a tube bank and the vortex shedding frequency increases with the flow velocity when the boiler is operated. … High level sound is suddenly generated when the vortex frequency comes close to the acoustic natural frequency of the duct. …

Transactions of the JSME (in Japanese) 86(891), 20-00250-20-00250, 2020

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19

Time-domain finite element formulation of porous sound absorbers based on an equivalent fluid model

Yoshida Takumi , Okuzono Takeshi , Sakagami Kimihiro

Acoustical Science and Technology 41(6), 837-840, 2020

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20

FUNDAMENTAL STUDY ON UNDERWATER NOISE CONTROL TECHNOLOGY FOR PILE-DRIVING WITH HYDRAULIC HAMMER [in Japanese]

TAMURA Yuichiro , ITAGAKI Yurie , TANAKA Yuichi

　本研究は，鋼管杭打設時の水中騒音低減対策技術の開発に向けた基礎的知見の把握を目的とし，室内水槽おいて模擬的な打設音発生装置を用いた水中音響実験を行った．水槽容積や鋼管仕様等の条件が異なる打撃音の音圧や周波数特性等を計測し，また水槽内の打撃音と現地での油圧ハンマによる打設音(鋼管径φ1.5m)を比較した．その結果、大型平面水槽(容積450m3</sup …

Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 76(2), I_516-I_521, 2020

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