Table 2.

Comparison of different types of sound sensors

Sensor	Mechanism	Size	Weight	Sensitivity
Our sensor	Piezoelectric accelerometer	l: 39 mm w: 23 mm h: 13.5 mm	13.5 g	9200 mV/g
Endevco 752A12	Piezoelectric accelerometer	h: 23.6 mm	13 g	100 mV/g
PCB 393 C	Piezoelectric accelerometer	Φ: 57.2 mm h: 54.9 mm	885 g	1000 mV/g
Analog devices ADXL354	MEMS accelerometer	l: 6 mm w: 6 mm h: 2.1 mm	0.26 g	400 mv/g
Bosch Sensortec BMA456	MEMS accelerometer	l: 2 mm w: 2 mm h: 0.65 mm	<0.1 g	300 mV/g