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Performance metrics of four sensors employed in this work.
| Sensitivity (mV/Pa) at 1 kHz | Frequency Range (kHz) | SNR (dB) | |
|---|---|---|---|
| Accelerometer (contact) | 1.02 mV/(m/s2) | 1 to 50 kHz | 25.12 |
| MEMS | 7.9 (mV/Pa) | 1 to 90 kHz | 14.7 |
| ECM | 4 (mV/Pa) | 4 to 80 kHz | 7.04 |
| DMM | 1.85 (mV/Pa) | below 20 kHz | 5.02 |
