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Re: pain threshold listening

Subject: Re: pain threshold listening
From: Rob Danielson <>
Date: Sat, 22 Jun 2002 10:49:37 -0500
Walter,

re:
>I have been out in a few frog chorus' that were above the pain threshold
>for me. I was glad to put the headphones on to monitor recording. And
the Telinga did not overload.

Thanks for confirming this for me. I have recorded peepers, chorus 
and toads that I know were approaching 120dB.  The inner ear 
distortions become amazing  after about 3 minutes. Anyone ever 
studied this phenomena?

Rob D.

  = = = =

>tony baylis wrote:
>>
>>  I can't comment on the Rode microphone.  However I
>>  think Syd and any others out there recording Lyrebirds
>>  at the moment might encounter some sounds approaching
>>  148db if they get their mics close enough.  Any body
>>  know how loud they get?
>
>I'm not sure on Lyrebirds, it's been many years since I heard them in
>the wild. They are loud for at least some notes.
>
>I do carry a sound meter around with me here. And it does not come close
>to 140 on natural sounds. This is well above the threashold of pain.
>
>I do know some frogs have been measured at close to 130 dB at the frog.
>Of course that dies off quite rapidly with distance. There have been
>some interesting studies done on how a frog like that does not go deaf
>from it's own calls as their hearing is as vulnerable as ours.
>
>I have been out in a few frog chorus' that were above the pain threshold
>for me. I was glad to put the headphones on to monitor recording. And
>the Telinga did not overload.
>
>>  As the summer/winter solstice has just passed I for
>>  one am looking forward to longer days.
>
>Yep I thought about that with that discussion, may be longest day here,
>but for you it's shortest.
>
>Walt
>
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Rob Danielson
Film Department
University of Wisconsin-Milwaukee


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