Underwater Sound from the RTC Pier { Underwater Acoustics Research Group }

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Gallery of Midshipman Sounds

Here is the start of the first midshipman call observed in 2008. (Disclaimer: we only have continuous good data starting on this day, so we don't know exactly when the calling started. It was not present in February.)
Click here for the sound, starting after about 8 seconds, and here for more spectrograms.
A stronger call.
Click here for the sound, here for more spectrograms.
Here is a call starting up, with the frequency drifting down a little.
Click here for the sound, here for more spectrograms.
Two fish calling at slightly different frequencies.
Click here for the sound, here for more spectrograms.
Frequency drifting down.
Click here for the sound, here for more spectrograms.
Two calling at once?
Click here for the sound, here for more spectrograms.
Near the end of this one-minute recording, in the last minute of the 15 minutes shown on the spectrogram, a midshipman is heard "turning on." Then a sedond one joins in. And finally a third. There seems to be beating from these sounds of similar intensity, separated by only a hertz or two in frequency.
Click here for the sound, here for more spectrograms.
A second caller joining one already calling.
Click here for the sound, here for more spectrograms.
To finish off, a strong call at a slightly higher pitch.
Click here for the sound, here for more spectrograms.
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