Table 2.

Acoustic test results of the transducer in the literature for similar applications.

Study	Channel Number	Frequency Range	Excitation	Output Level [mV]	Dimensions [mm3]
This Study	8	250–6000 Hz	100 dB	320.3	2 x (3 × 3 × 0.36)
[18]	8	250–5500 Hz	100 dB	50.7	5 × 5 × 0.62
[15]	8	2.9–12.6 kHz	101.7 dB	4.06	2.5 × 2.5 × 0.6
[14]	10	10v37 kHz	112.4 dB	3.55	≈6.5 × 6.5 × 0.35
[11]	16	300–700 Hz	1 g (>100 dB)	9.6	32 × 32 × 0.55
[17]	7	830–3600 Hz	120.1 dB	430	3–10 × 20 × 0.01
[20]	1	1325 Hz	100 dB	40	5 × 5 × 0.5