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Re: bird song

Subject: Re: bird song
From: Dan Dugan <>
Date: Wed, 27 Nov 2002 23:16:06 -0800
Gerald White wrote,

>I have seen a couple posts indicating that the sound from small
>speakers, say two watts, has limited projection in the outdoors.  I
>interpret from this that live bird song may carry farther.  Why
>doesn't sound from speakers project well in the outdoors?  Would a
>small birds live song carry a longer distance than it's recorded
>song  played through a two watt speaker?  A two watt speaker at
>close range sounds pretty loud to me when something is played over
>it.  I wouldn't interpret small bird live song as being any louder. 
>Is there something different between the sounds?  If it is just
>volume, how much power would it take to replicate a small birds live
>song.

I hope someone has some figures on bird SPLs, that would be very 
interesting. I can contribute two points: 1) birds are incredibly 
efficient sound producers, and 2) a typical non-horn speaker is only 
5-10% efficient.

-Dan Dugan


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