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One of several low frequency sounds picked up when tuned into a Radio Japan transmission on the Twente University online radio receiver.
http://websdr.ewi.utwente.nl:8901/
This sound was further processed in Audacity with amplitude envelope to make it work better as a kick drum
Type
Wave (.wav)
Duration
0:00.565
File size
8.0 KB
Sample rate
7119.0 Hz
Bit depth
16 bit
Channels
Mono