I've been getting such decent resolution in the low register that
I revisited this recording of whale song. Big singer, low
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?
This is the swooping note, with the upper register harmonics.
Here's the context. This 17-second segment starts with a growl
and is followed by the descending notes.
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.