Approximate propagation distances presuming spherical spreading of sciaenid vocalizations under idealized conditions
| Common name . | Vocalization frequency (Hz) . | Vocalization SPL . | Mean auditory pressure threshold . | Cylindrical spreading distance (m) . |
|---|---|---|---|---|
| Weakfish | 400-5001 | 1272 | 96.4 | 32 |
| Spotted seatrout | 400-5001 | 139.63 | 97.3 | 128 |
| Atlantic croaker | 3001 | 1144 | 94.9 | 8 |
| Red drum | 2001 | 1285 | 99.6 | 32 |
| Common name . | Vocalization frequency (Hz) . | Vocalization SPL . | Mean auditory pressure threshold . | Cylindrical spreading distance (m) . |
|---|---|---|---|---|
| Weakfish | 400-5001 | 1272 | 96.4 | 32 |
| Spotted seatrout | 400-5001 | 139.63 | 97.3 | 128 |
| Atlantic croaker | 3001 | 1144 | 94.9 | 8 |
| Red drum | 2001 | 1285 | 99.6 | 32 |
Sound pressure levels (SPL) and auditory thresholds are given in dB re: 1μPa. These calculations assume: spherical spreading (decrease of 6 dB for each distance doubled, in m), uniform water of sufficient depth to not preclude sound propagation, no additional scattering or attenuating objects,and background noise below each species' auditory threshold. Vocalization SPLs are for single individuals except seatrout (an aggregation)
(Ramcharitar et al., 2006a; Connaughton et al., 1997; Fine et al., 2004)
(Sprague and Luczkovitch,2004)
(Baltz, 2002)
(Barimo and Fine, 1998)
J. J. Luczkovich, personal communication