Squid studies shed light on hearing mechanisms in humans

**Jean** · Oct 15, '10, 6:59pm

Interesting article from WHOI!

http://www.whoi.edu/oceanus/viewArticle.do?id=82511

**octobot** · Oct 16, '10, 5:56am

Squid studies shed light on hearing mechanisms in humans
From ScienceDaily.com:

The ordinary squid, Loligo pealii -- best known until now as a kind of floating buffet for just about any fish in the sea -- may be on the verge of becoming a scientific superstar, providing clues about the origin and evolution of the sense of hearing.

**octobot** · Oct 18, '10, 6:12am

Zee News
What Can Squid Hear?
Treehugger
But researchers studying squid hearing hope to learn even more. Can studying squid hearing help us understand how all ears work? Squid anchor many oceanic ...
Squid studies shed light on hearing mechanisms in humansSify
Squid studies provide valuable insights into hearing mechanismsEurekAlert (press release)

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**Tintenfisch** · Oct 18, '10, 4:00pm

Originally Posted by The article

His preliminary findings showed that squid statocysts respond to sounds, but only to relatively low
frequencies, up to 500 Hertz; they do not detect the very high frequency echolocation sounds that dolphins use to find prey.

However, up to 500Hz apparently covers most of the range used by baleen whales (thank you, Wikipedia

), which could be very useful. (BTW, isn't Loligo now Doryteuthis? Tsk, tsk.)

**DWhatley** · Oct 19, '10, 12:17am

I have been trying to find out what commonly available things make noises at their hearing range. It would be interesting to create a "dinner bell" if I could find something appropriate. Anyone with a clue?

**CaptFish** · Oct 19, '10, 11:20am

A loud clicking noises, I always hear them when I'm diving.....Like the sound made by those antique tin alligators that clicked. I have thought would make a good 'dinner bell', loud repetitive clicking.

Or as a kid we used to bend the lids from glass Snapple bottles and they would click really loud. That woudl be perfect too.

**Jean** · Oct 19, '10, 5:19pm

Used to use those clickers to train my dog!

**DWhatley** · Oct 19, '10, 9:04pm

I have found several dog clickers and toy clickers and I may order one but first I want to find something that I know is within the 400-1000 hz range noted in the octopus hearing article last year. Since this article mentions 500hz I am using that frequency to search. So far I have found that the low note on a car horn is in this range but I am still looking for something practical.

I found one project buzzer with a 300-500hz range but how would I know (without buying test equipment) what the actual output is?

**CaptFish** · Oct 19, '10, 10:44pm

you can check the frequencies of stuff around the house here.

http://www.techmind.org/audio/SpecAn_2v8.exe

**CaptFish** · Oct 19, '10, 10:50pm

You should also be able to download a program that will output whatever frequency you tell it. I have one on my iphone.

found it Signal generator:
http://www.techmind.org/audio/siggen.exe

**DWhatley** · Oct 20, '10, 12:01am

Humm, maybe I will look for a small cheap recording device since we don't have a computer near the tanks.

NOW look what you have started. If they had an octopus I could not resist (and still may not) but I am afraid the talking dolphin would scare them

http://cgi.ebay.com/Recording-Ventri...item746ab5b69c