Sound Source Omnidirectional Positioning Calibration Method Based on Microphone Observation Angle

Table 1

Sound source omnidirectional localization simulation results based on seven-element microphone array.

Theory location (meters)	Theoretical angle (degrees)	Simulation location (meters)	Simulation angle (degrees)	Location error rate (%)	Angle error rate (%)
(80,−60,120)	H 1 = −36.8699	(79.9952,−59.9958,120.0053)	H 1′ = −36.8696	(0.006,0.007,0.0044)	0.0024
	H 2 = 50.1944		H 2′ = 50.1975		0.0052
(−50,0,−130)	H 1 = 180	(−49.9955,0,−130.0017)	H 1′ = 180	(0.009,0,0.0013)	0
	H2 = −68.9625		H 2′ = −68.9645		0.0022
(0,70,150)	H 1 = 90	(0,69.9958,150.0020)	H1′ = 90	(0,0.006,0.0013)	0
	H 2 = 64.9831		H 2′ = 64.9847		0.0014
(0,0,−80)	H 1 = 0	(0,0,−80)	H 1′ = 0	(0,0,0)	0
	H 2 = −90		H 2′ = −90		0