Abstract
Recordings have been made of the sounds made by the various fish which inhabit the Narragansett Bay area. Of more than 25 species studied, only six produced significant amounts of noise. These were the red-winged and common sea robin, the toadfish, the long-horned sculpin, the puffer, and the burrfish. The signals from the recordings were later fed into a harmonic analyzer whose output meter was replaced by an Esterline Angus recording milliammeter. Readings were taken at intervals of 25 c/sec. throughout the entire audible frequency spectrum. Each selected portion of noise was replayed into the analyzer for the measurement at each frequency. The microphones were calibrated so that approximate intensities could be measured. The spectral distribution of the sound is reported for each of the noise-making species. A second type of noise, not previously reported, has been observed in the case of the toad fish.
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