Table 2. Descriptive statistics of sonic parameters of the N9, N10, N13, and N17 call types.
| Dur | IPPI | τ95% | τ−3 dB | τ−10 dB | fp | fc | BWrms | Q | SPLzp | SPLrms | EFD | N1 | N2 | N3 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N9 | P50 | 300.30 | 9.09 | 3.22 | 0.31 | 0.36 | 856 | 1,366 | 1,228 | 1.14 | 130.99 | 122.81 | 147.51 | 9 | 287 | 296 |
| QD | 28.03 | 0.25 | 0.48 | 0.10 | 0.21 | 59 | 153 | 557 | 0.32 | 2.50 | 3.34 | 2.97 | ||||
| P5 | 253.39 | 8.32 | 2.42 | 0.15 | 0.16 | 747 | 1,015 | 679 | 0.48 | 122.99 | 112.08 | 139.48 | ||||
| P95 | 334.04 | 9.49 | 6.49 | 1.24 | 1.53 | 1,144 | 2,273 | 4,709 | 1.62 | 136.98 | 128.21 | 152.82 | ||||
| N10 | P50 | 356.94 | 10.50 | 4.35 | 0.21 | 1.16 | 903 | 1,580 | 1,222 | 1.27 | 139.67 | 128.22 | 154.66 | 13 | 448 | 461 |
| QD | 59.78 | 0.29 | 1.51 | 0.11 | 0.48 | 113 | 289 | 525 | 0.31 | 9.20 | 10.27 | 9.09 | ||||
| P5 | 275.72 | 9.73 | 2.93 | 0.11 | 0.15 | 667 | 1,024 | 772 | 0.62 | 123.93 | 110.66 | 138.54 | ||||
| P95 | 544.98 | 11.07 | 7.39 | 0.43 | 1.72 | 1,274 | 2,450 | 3,705 | 1.80 | 147.13 | 137.36 | 162.00 | ||||
| N13 | P50 | 119.15 | 13.11 | 3.33 | 0.39 | 0.86 | 1,296 | 1,776 | 702 | 2.53 | 156.35 | 146.42 | 170.87 | 26 | 190 | 216 |
| QD | 46.27 | 0.22 | 0.48 | 0.02 | 0.09 | 139 | 44 | 66 | 0.23 | 1.33 | 1.45 | 1.16 | ||||
| P5 | 35.06 | 12.67 | 2.54 | 0.34 | 0.72 | 1,178 | 1,681 | 595 | 1.23 | 150.66 | 140.18 | 166.38 | ||||
| P95 | 170.20 | 13.93 | 5.99 | 0.48 | 1.19 | 2,390 | 1,931 | 1,548 | 2.92 | 158.05 | 147.96 | 172.61 | ||||
| N17 | P50 | 149.11 | 17.44 | 4.40 | 0.52 | 0.97 | 789 | 1,144 | 490 | 2.35 | 159.56 | 151.11 | 177.30 | 462 | 3,803 | 4,265 |
| QD | 10.00 | 1.11 | 0.34 | 0.02 | 0.05 | 49 | 48 | 27 | 0.11 | 1.48 | 1.36 | 1.41 | ||||
| P5 | 141.53 | 16.04 | 4.02 | 0.50 | 0.93 | 765 | 1,100 | 464 | 2.23 | 158.17 | 149.75 | 175.99 | ||||
| P95 | 179.74 | 19.31 | 5.42 | 0.64 | 1.82 | 957 | 1,278 | 641 | 2.65 | 163.93 | 155.10 | 181.30 |
Notes.
- P50
- median; P5 and P95, 5th percentile and 95th percentile, respectively
- QD
- quartile deviation
- Dur
- duration
- IPPI
- inter-pulsepeak interval
- τ95%
- duration of 95% cumulative energy
- τ−3 dB and τ−10 dB
- duration of −3 dB and −10 dB of the peak amplitude of the enveloped signal, respectively
- fp
- peak frequency
- fc
- center frequency
- BWrms
- centralized root-mean-square bandwidth
- Q
- quality factor
- SPLzp and SPLrms
- zero-to-peak and root-mean-square sound pressure levels, respectively
- EFD
- energy flux density
- N1, N2 and N3
- number of calls, inter-pulsepeak intervals and pulses analyzed, respectively
The duration is in seconds, the frequency is in Hz, the SPL is in dB re 1 µPa, and the EFD is in dB re 1 µPa2s. The IPIs are not shown here and can be obtained by subtracting 8 ms from the IPPIs. The same notation was used for the following tables.