Table 1. Acoustic parameters of two sets of sinusoidal frequency modulated (SFM) vocalizations (Type 2) produced by a female (set of 3) and male (set of 4) southern flying squirrel (Glaucomys volans) recorded in a room lined with sound attenuating foam at McMaster University.
| Duration (ms) | IPI (ms) | Min (kHz) | Max (kHz) | |
| Set of 3 | ||||
| 1 | 44 | - | 20.9 | 25.8 |
| 2 | 109 | 231 | 19.5 | 26.3 |
| 3 | 65 | 290 | 19.5 | 26.8 |
| Set of 4 | ||||
| 1 | 105 | - | 18.7 | 25.1 |
| 2 | 135 | 285 | 20.8 | 26.3 |
| 3 | 79 | 285 | 18.5 | 25.8 |
| 4 | 60 | 250 | 19.0 | 26.1 |
Parameters included call duration, interpulse interval (IPI), minimum and maximum frequency.