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Re: I need a duck expert

Subject: Re: I need a duck expert
From: "Rich Peet" <>
Date: Tue, 29 Apr 2003 02:44:36 -0000
Thanks for all the input and help.  I did my homework with a hour of
recorded sounds that I did not post.  I didn't know how to put up an
entire hour of sound for evaluation so I put up my best shot.

In review of all info and looking into all suggesions I figure I
lose.  I didn't record a Bufflehead and recorded a portion of a Song
Sparrow.=20

Maybe the next time I will find something completely new.  This year
I will settle with new mixes of the old.  I like these oldies.

Thanks Marty you hit it on the head.

Rich

--- In  Marty Michener <>
wrote:
>
>
> Rich and Mark and Martyn and all:
>
> Lets specify the starting time seconds for each of the sounds if we
want to
> discuss them.
>
> The recording evidently, because it is in the original stereo,
shows song
> sparrow sounds coming from a number of locations - almost certainly
none of
> them from where Rich was pointing his parabola across the water.=20
This idea
> is supported by the observation that almost none of the songs show
much of
> the typical higher frequency initial notes, where the parabola will
provide
> a narrower beam, and act more effectively to block side sound
sources.
>
> I hear the following four Song Sparrow songs:
>
> 0 -1.5 sec. the sound is much louder on the right side. I can
see/hear only
> the final trill ~ 1600 Hz. The bird is likely down in the grass,
where 1600
> Hz (lambda =3D 17 cm) will penetrate grass well, while the initial
notes (3
> kHz, lambda =3D 9 cm) much less so.
>
> 6 - 7.5 sec quite faint, about equal L-R.
>
> 14.5 - 17 sec loud in the left mic. Here, finally the two intro
notes are
> clear about 3 and 3.5 kHz well before the trill at 1600 Hz
>
> 22 - 23.5 balance like the sound at 0 sec, more on the right;
missing high
> notes.
>
> If the sparrow(s) songs had been anywhere near the focal cone of
the
> parabola the high frequencies might (typically) exceed the volume
of  the
> final trill.
>
> my best regards,
>
> Marty Michener
> MIST Software Associates PO Box 269, Hollis, NH 03049
>
> EnjoyBirds.com  - Software that migrates with you.=20=20=20
http://www.EnjoyBirds.com
>
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>
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