Table 1. Description of different properties that are used to describe the male advertisement call of M. nilphamariensis.
Properties analyzed are after Bee, Suyesh & Biju (2013a) and Bee, Suyesh & Biju (2013b).
| Call properties | Description |
|---|---|
| Overall call properties | |
| Call duration (ms) | Time between the start of the initial pulse and the end of the final pulse |
| Call rise time (ms) | Time between start of the initial pulse and the point of maximum amplitude (peak) of the call |
| Call fall time (ms) | Time between the point of maximum amplitude and offset of last pulse. |
| Inter-call interval | The time between offset of the last pulse in a call to the beginning of the initial pulse of the next call |
| Pulses per call | Number of pulses in a given call |
| Pulse rate (pulses/s) | Number of pulses minus 1 (N - 1), divided by time between start of the initial pulse and beginning of the last pulse |
| Overall dominant frequency (kHz) | Maximum frequency using Raven’s selection spectrum function over the entire call duration |
| Dominant frequency 1 (Hz) | Initial peak frequency using Raven’s selection spectrum function over the entire call duration; Initial band in spectrogram view |
| Dominant frequency 2 (Hz) | Second peak frequency using Raven’s selection spectrum function over the entire call duration; Second band in spectrogram view |
| Pulse properties | |
| Initial pulse period (ms) | Time between start of the initial pulse to start of the second pulse |
| Middle pulse period (ms) | Time between start of the middle pulse to start of the next pulse |
| “N-1” pulse period (ms) | Time between start of the second last pulse to start of last pulse |
| Maximum amplitude pulse properties | |
| Overall pulse dominant frequency (kHz) | Peak frequency using Raven’s spectrogram slice function over the entire pulse duration |
| Pulse dominant frequency 1 (kHz) | Initial peak frequency using Raven’s spectrogram slice function over the entire pulse duration |
| Pulse dominant frequency 2 (kHz) | Second peak frequency using Raven’s spectrogram slice function over the entire pulse duration |
| Pulse period (ms) | Time between beginning of pulse to that of the next pulse |
| Pulse duration (ms) | Time between pulse start and end |
| Pulse rise time (ms) | Time between beginning of the pulse and the point where maximum amplitude is attained |
| Pulse 50% rise time (ms) | Time between beginning of the pulse and the point where 50% of the maximum amplitude is attained |
| Pulse fall time (ms) | Time between the point of maximum amplitude and the offset of the pulse |
| Pulse 50% fall time (ms) | Time between the point where the maximum amplitude is half its value (50%) and the offset of the pulse |