Stabled frequency (kHz)

Counts of consecutive equivalent peak frequencies (times)

0.60

3

2.00

3

3.60

4

3.86

3

3.88

3

3.90

3

5.10

3

5.63

3

5.90

4

6.30

4

7.88

3

4.42 ± 4.02

3.27 ± 0.47