Visualization of sound reflection and diffraction using finite difference time domain method
スポンサーリンク
概要
- 論文の詳細を見る
Visualization of sound field helps us to intuitively understand mechanisms of various acoustic phenomena and therefore the technique is much effective for both of educational and engineering purposes. This paper presents some examples of sound field visualization based on numerical analysis. In order to analyze such complicated acoustic phenomena as reflection, diffraction and interference, the finite difference time domain(FDTD)method based on the wave theory is applied to the calculation. In the FDTD algorirhm, all of the sound field is computed in discrete time steps and therefore transient acoustic phenomena can be easily animated. As an application of the numerical technique to environmental noise control engineering, sound reflection and diffraction around noise barriers with a variety of cross sectional shapes and noise propagation from depressed/semi-underground road structures are introduced in this paper.
- 社団法人日本音響学会の論文
著者
-
Tachibana Hideki
Institute Of Industrial Science University Of Tokyo
-
Sakamoto Shinichi
Institute Of Industrial Science The University Of Tokyo
-
Seimiya Takuma
Institute of Industrial Science, University of Tokyo
-
Seimiya Takuma
Institute Of Industrial Science University Of Tokyo
関連論文
- Loudness and noisiness of a repeated impact sound : Results of round robin tests in Japan(II)
- Evaluation of the loudness of impulsive sounds using sound exposure level based on the results of a round robin test in Japan
- Sound field simulation for stage acoustics using 6-channel system
- 演奏者に対する初期反射音の効果に関する基礎実験
- 心理音響学に基づく床衝撃音評価方法の研究
- Acoustic survey of auditoriums in Europe and Japan
- Study on sound transmission between open-type classrooms by numerical analysis
- Sound field simulation method by combining finite difference time domain calculation and multi-channel reproduction technique
- 6-channel recording/reproduction system for 3-dimensional auralization of sound fields
- Visualization of sound propagation and scattering in rooms
- Leak transmission characteristic of slit-shaped apertures and effect of porous type absorption on reducing propagating sound
- Calculation of impulse responses and acoustic parameters in a hall by the finite-difference time-domain method
- Experimental and numerical studies on reverberation characteristics in a rectangular room with unevenly distributed absorbers(introduction to the amazing world of sounds with demonstrations)
- Reverberation characteristics in a room with unevenly-distributed absorbers : Scale modeling study
- Reverberation characteristics in a room with unevenly-distributed absorbers : Numerical analysis
- A sound field simulation system for the study of ensemble performance on a concert hall stage
- Scale model experiment on room acoustics by hybrid simulation technique
- Correctioon for the effect atomspheric sound absorption on the sound absorption coefficients of materials measured in a reverberation room
- Basic study on active noise barrier
- On the in situ estimation of surface acoustic impedance in interiors of arbitrary shape by acoustical inverse methods
- Report on the International Symposium on Active Control of Sound and Vibration, in Tokyo
- Experimental study on the evaluation of stage acoustics by musicians using a 6-channel sound simulation system
- Visualization of sound reflection and diffraction using finite difference time domain method
- A new method of measuring normal incident sound absorption characteristics of materials using acoustic tube
- Noise source identification on rolling tires by sound intensity measurement
- Definition and measurement of sound energy level of a transient sound source
- Hyperbolic sweep signals for architectural acoustic measurements
- Special issue on Room Acoustics in honour of RADS 2004
- Constructing a database of computational methods for environmental acoustics
- Calculation of sound propagation in three-dimensional field with constant cross section by Duhamel's efficient method using transient solutions obtained by finite-difference time-domain method
- Development of energy-based calculation methods of noise radiation from semi-underground road using a numerical analysis
- Sound power levels of road vehicles measured by a new method using a reverberant tunnel
- Effects of room shape and diffusing treatment on the measurement of sound absorption coefficient in a reverberation room
- Improvement of sound insulation of doors or windows by absorption treatment inside the peripheral gaps
- Difference in acoustic effect of sound diffusers due to room shapes
- Numerical study on sound absorption characteristics of resonance-type brick/block walls