Air Ultrasonic Signal Localization with a Beamforming Microphone Array

Figure 4

Simulated reconstruction result by sum and delay beamforming for a V = 8.2 spiral array with 32 elements (Figure 2(b)). The spiral is located at a distance of 18 cm from two point sources, which are separated by 5 mm. (a) Point sources are two spherical waves at 75 kHz. (c) Point sources are spherical waves at 74 and 76 kHz, respectively. (b), (d) Cross section of (a) and (c) at y = 0. Red dots show the position of the sources.

(a)

(b)

(c)

(d)