scholarly journals Real-time visualization of sound source by means of acoustic holography with a 2-D microphone array system

2000 ◽  
Vol 20 (1Supplement) ◽  
pp. 461-464
Author(s):  
Shun-ichi OHSHIMA ◽  
Haruo HOUJOH
Keyword(s):  
Real Time ◽  
Sound Source ◽  
Microphone Array ◽  
Acoustic Holography ◽  
Real Time Visualization

Assessment of MUSIC-Based Noise-Robust Sound Source Localization with Active Frequency Range Filtering

2018 ◽  
Vol 30 (3) ◽  
pp. 426-435 ◽  
Author(s):  
Kotaro Hoshiba ◽  
Kazuhiro Nakadai ◽  
Makoto Kumon ◽  
Hiroshi G. Okuno ◽  
◽  
...  
Keyword(s):  
Real Time ◽  
Source Localization ◽  
Sound Source ◽  
Microphone Array ◽  
Sound Source Localization ◽  
Noise Robustness ◽  
Frequency Range ◽  
Real Time Processing ◽  
Time Processing ◽  
Localization Method

We have studied sound source localization, using a microphone array embedded on a UAV (unmanned aerial vehicle), for the purpose of detecting for people to rescue from disaster-stricken areas or other dangerous situations, and we have proposed sound source localization methods for use in outdoor environments. In these methods, noise robustness and real-time processing have a trade-off relationship, which is a problem to be solved for the practical application of the methods. Sound source localization in a disaster area requires both noise robustness and real-time processing. For this we propose a sound source localization method using an active frequency range filter based on the MUSIC (MUltiple Signal Classification) method. Our proposed method can successively create and apply a frequency range filter by simply using the four arithmetic operations, so it can ensure both noise robustness and real-time processing. As numerical simulations carried out to compare the successful localization rate and the processing delay with conventional methods have affirmed the usefulness of the proposed method, we have successfully produced a sound source localization method that has both noise robustness and real-time processing.

Real‐time visualization of acoustic wave fronts by using a two‐dimensional microphone array

1988 ◽  
Vol 84 (4) ◽  
pp. 1373-1377 ◽  
Author(s):  
Yukio Hiranaka ◽  
Osamu Nishii ◽  
Takayuki Genma ◽  
Hiro Yamasaki
Keyword(s):  
Acoustic Wave ◽  
Real Time ◽  
Microphone Array ◽  
Two Dimensional ◽  
Wave Fronts ◽  
Real Time Visualization

Design and Implementation of Real-Time Visualization of Sound Source Positions by Drone Audition

2020 ◽  
Author(s):  
Mizuho Wakabayashi ◽  
Kai Washizaka ◽  
Kotaro Hoshiba ◽  
Kazuhiro Nakadai ◽  
Hiroshi G. Okuno ◽  
...  
Keyword(s):  
Real Time ◽  
Sound Source ◽  
Design And Implementation ◽  
Real Time Visualization

Study of Spherical Near-Field Acoustic Holography with Rigid Spherical Microphone Array

2013 ◽  
Vol 546 ◽  
pp. 156-163
Author(s):  
Xin Guo Qiu ◽  
Ming Zong Li ◽  
Huan Cai Lu ◽  
Wei Jiang
Keyword(s):  
Sound Source ◽  
Microphone Array ◽  
Near Field ◽  
Sound Field ◽  
Acoustic Holography ◽  
Real Situation ◽  
Helmholtz Equations ◽  
Sound Sources ◽  
Array Configuration ◽  
Sphere Radius

The aim of this paper is to investigate the impacts of various parameters of rigid spherical microphone array in detecting and locating interior sound source. Helmholtz Equations are adopted to express the sound field produced by the incident field and scattered field. The gradient of the pressure is zero at the surface for the sphere is rigid. Both the incident and scattered coefficient could be obtained by solving the Helmholtz Equation using the boundary condition. Then the interior sound field could be detected and located on with the methodology of spherical near-field acoustic holography (SNAH). This study is developed in two aspects，one is configuring the microphone in various distribution in the same sphere radius, and the other one is changing the radius of sphere array. Numerical simulations are carried out to determine the optimum microphone array configuration and structure parameters. One, two, and three sound sources are arranged respectively in different displacement to the sphere center and in different angle direction to simulate the real situation. During the experiments, Omni-directional speakers and beeps are adopted as sound sources. The result shows that the method to detect and locate sound source in interior sound field is valid.

scholarly journals Real-Time Multiple Sound Source Localization and Counting Using a Circular Microphone Array

2013 ◽  
Vol 21 (10) ◽  
pp. 2193-2206 ◽  
Author(s):  
Despoina Pavlidi ◽  
Anthony Griffin ◽  
Matthieu Puigt ◽  
Athanasios Mouchtaris
Keyword(s):  
Real Time ◽  
Source Localization ◽  
Sound Source ◽  
Microphone Array ◽  
Sound Source Localization
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