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Relationship between pressure differential (PD) across the larynx and sound frequency (FR), laryngeal airflow (AF), or sound pressure (SP) for three species of treefrogs as fit with straight lines.
| Species | Frequency (Hz) | Airflow (dm3/min) | Sound pressure (Pa) |
|---|---|---|---|
| H. versicolor | FR = 337PD − 33153 | AF = 1.573PD − 159.467 | SP = 0.415PD − 42.202 |
| P. streckeri | FR = 345PD − 33924 | AF = 0.889PD − 90.689 | SP = 0.226PD − 23.087 |
| A. crepitans | FR = 600PD − 59450 | AF = 0.799PD − 81.504 | SP = 0.254PD − 26.040 |
