Thanks, Jim. Good advice as always .... I was just typing a note to you
about this off-list as you're the one person I know (and whose
recordings I know) that uses a similar reflector.
I started asking about this because some close recordings of Buntings
that I've been making recently sound a whole lot better with high Hz
attenuated quite a bit. So that's what I've been doing.
And then, it seems, that real question is how the frequency dependent
gain of the reflector (which I can't yet calculate, but at least know
how to do) is related to the frequency dependent impedance of the air
(which I have no idea how to calculate). What fun!
Steve P
Jim Morgan wrote:
>
>
> Not a dumb question Steve, but in my opinion a rather complex one. As
> you know the Telinga parabola as well as others tend to amplify the
> higher frequencies more than the low. This tends to compensate for the
> natural attenuation of higher frequency sounds that increase with the
> distance from the source to the mic. So the bird or whatever sounds
> closer than it really is.
>
> On close recordings I often point the parabola slightly away from the
> sound source thus reducing the high frequency amplification. I have also=
> on rare occasions reduced the high frequency amplitude to get a more
> natural sounding recording. One particular case that comes to mind was a=
> recording of a Western Meadowlark at about 15-20 feet. As you can
> imagine it came out rather shrill but reducing the higher frequency
> amplitude gave me a recording that was pleasing to my ears.
>
> So I think it all depends on what sounds good to you and or what effect
> you are trying to achieve.
>
> Jim
>
> Jim Morgan
> Prescott, Arizona USA
> http://www.wingsofnature.com <http://www.wingsofnature.com>
>
|