https://www.google.com/search?q=
filetype:pdf+%22stefan+HELMREICH%22+SYLLABUS
filetype:PDF+%22stefan+helmreich%22+%22UNDERWATER+MUSIC%22
http://www.sensorystudies.org/timeline/
a quick modification, for fun, of the 'clacker/squirter'
made a close-to-real-time 10xSlow audio reflector,
and was not expecting to hear it sounded underwater-y.
speed of sound/ so why a factor of 10? (yet to investigate range)

puppy's jingling collar comes back out the easiest to recognize.
questions about animal's hearing
[center frequency proportional to distance between ears]
(!bat-headphones, magazine)
JCLilly dolphin machine

close and far in the overlapping of sensory ranges, biochemistries, further on.
nice to lengthen list, incrementally