scholarly journals Parametric measurement of sound source directivity: Effect of the source nearfield

1988 ◽  
Vol 84 (S1) ◽  
pp. S8-S8
Author(s):  
John D. Sample
Keyword(s):  
Sound Source ◽  
Directivity Effect ◽  
Source Directivity

Effects of sound source directivity on auralizations

2002 ◽  
Vol 111 (5) ◽  
pp. 2331
Author(s):  
Nathan W. Sheets ◽  
Lily M. Wang
Keyword(s):  
Sound Source ◽  
Source Directivity

scholarly journals An Inverse Microphone Array Method for the Estimation of a Rotating Source Directivity

Acoustics ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 462-472
Author(s):  
Simon Jekosch ◽  
Ennes Sarradj
Keyword(s):  
Sound Source ◽  
Inverse Method ◽  
Microphone Array ◽  
Synthetic Data ◽  
Directivity Pattern ◽  
Microphone Arrays ◽  
Spectral Matrix ◽  
Source Directivity ◽  
Directivity Patterns ◽  
Source Motion

Microphone arrays methods are useful for determining the location and magnitude of rotating acoustic sources. This work presents an approach to calculating a discrete directivity pattern of a rotating sound source using inverse microphone array methods. The proposed method is divided into three consecutive steps. Firstly, a virtual rotating array method that compensates for motion of the source is employed in order to calculate the cross-spectral matrix. Secondly, the source locations are determined by a covariance matrix fitting approach. Finally, the sound source directivity is calculated using the inverse method SODIX on a reduced focus grid. Experimental validation and synthetic data from a simulation are used for the verification of the method. For this purpose, a rotating parametric loudspeaker array with a controllable steering pattern is designed. Five different directivity patterns of the rotating source are compared. The proposed method compensates for source motion and is able to reconstruct the location as well the directivity pattern of the rotating beam source.

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