Table 1 Comparison of the frequency range (kHz) with specified SPL and THD between this work and other piezoelectric loudspeakers
Ref. | SPL ≥ 80 dB | SPL ≥ 100 dB | THD ≤ 3% | THD ≤ 1% | Diaphragm area (mm2) | Excitation voltage |
|---|---|---|---|---|---|---|
This work | 0.45-20 | 7.1-20 | 0.4-2.8 & 3.55-20 | 3.75-20 | 28.3 | 3 Vpp (Config. A + B) |
Ref. 18 | 5-18 | 5.6-8.3 & 11.2-14.5 | 7.7-18 | 8.4-12.5 | 7.14 | 2 Vpp+9 Vdc |
Ref. 19 | 0.02-20 | 0.1-18 | 0.02-3 | 0.02-2 | 16 | 8 Vrms |
Ref. 20 | 0.02-20 | 4.6-15 | 0.02-2.4 | 0.06-2.2 | 16 | 2 Vpp |
Ref. 22 | 3.3-14.1 | 5.2-6.4 | 1-8.9 & 11-20 | 11-20 | 2.25 | 1 Vpp+2 Vdc |
Ref. 24 | 0.11-20 | 2.8-3.3 | Not provided | Not provided | 22.5 | 2 Vpp |
Ref. 28 | 0.1-20 | 3.8-18 | 0.1-3.3 | 0.1-1.2 | 14.44 | 5 Vpp+12 Vdc |
