Table 2.

List of commercial acoustic sensors.

Sound Sensor	Grove Sound Sensor	VMA309	IMP34DTO5	Adafruit I2S MEMS Microphone SPH0645LM4H
Operating Voltage	5 V	3.3–5 V	1.6–3.6 V	1.6–3.6 V
Operating Current	4–5 mA	10–15 mA	650 mA	600 uA
Sensitivity	−52–48 dB (1 KHz)	−48–66 dB	−26 dBFS	−42 dB
Frequency Range	16 Hz–20 KHz	50 Hz–20 KHz	100 Hz–10 KHz	50 Hz–15 kHz
S/N Ratio	54 dB		64 dB	65 dB
Dimensions	20 × 20 × 5 mm	44 × 15 × 10 mm	3 × 4 × 1 mm	16.7 × 12.7 × 1.8 mm
Price	5 €	6.34 €	2.1 €	7 €