D3 D2 D1 D3 D2 - PLOS

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D1 length: 20.6 mm. 16.1 mm. 12.6 mm. 82.6 Hz. 120.5 Hz. 172.4 Hz. D1 resonant freq: Length (mm). D3. 29.1. 29.1. Length (mm). Frequency (Hz). D2. 50. 150.
A D2 5 mm

D1

16.1 mm

12.6 mm

D1 resonant freq:

20.6 mm 82.6 Hz

120.5 Hz

172.4 Hz

Drive freq:

110 Hz

110 Hz

110 Hz

D1 length:

−16

B Frequency (Hz)

−8

D3 D2

D1

50

−12

100 ms

−4

Black line: 110 Hz Driving frequency (DF)

150 1st harmonic of DF

250 2nd harmonic of DF

350

C

20.6

17.8

15.3

10.3

23.5

23.5

D2

50

Frequency (Hz)

12.6

D3 Driving frequency (DF)

150 1st harmonic of DF

250

350

2nd harmonic of DF

36.2 31.8 29.2 25.8 21.7 17.9 13.0

Length (mm)

29.1

29.1

Length (mm)