Air Ultrasonic Signal Localization with a Beamforming Microphone Array

Table 1

Results of post processing experimental data.

Ring	16 Microphones		32 Microphones		48 Microphones
d	MSL (dB)	API	MSL (dB)	API	MSL (dB)	API
0.5 D	-	-	-0.20	0.65	-0.25	0.66
0.65 D	-	-	-2.00	0.74	-1.50	0.75
0.9 D	-0.89	1.08	-4.10	1.10	-4.10	1.12
Spiral 8.2	16 Microphones		32 Microphones		48 Microphones
d	MSL (dB)	API	MSL (dB)	API	MSL (dB)	API
0.5 D	-	-	-1.45	1.54	-4.10	1.67
0.65 D	-	-	-4.40	1.65	-6.00	1.68
0.9 D	-2.24	2.00	-5.65	1.89	-6.20	1.94