Whale song

I've been getting such decent resolution in the low register that I revisited this recording of whale song. Big singer, low notes.

No particular observations, other than the images look pleasingly whale-like. An onomatopoeia is a word that sounds like what it is. What do you call a sound that looks like what it is?

whale song detail




This is the swooping note, with the upper register harmonics.

whale song segment




Here's the context. This 17-second segment starts with a growl and is followed by the descending notes.

whale song segment



This is a 3-second detail from the upper register. The sounds may well be caused by bubble motion, so it may not be coincidence that it looks bubbly.

whale song segment