Ian,
I posted a message about this last week, so I will paste it below. In addit=
ion to below,
you have to remember that you will not hear any bats, even if you have reco=
rded them. You
need to be able to view the audio file in a spectrum view. I use Audition f=
or this, but
other software can do the same. The hear the recording once you have locate=
d the section
where you have the bats, is either change the sample rate to a much lower v=
alue i.e. from
192kHz to 16kHz or something of that order or you can change the pitch in s=
oftware.
Mike
--------------------
Hi,
Just because a manufacture says the mics response goes up to 20kHz, does no=
t mean it will
not allow you record higher frequencies.
Take the following as an example that I recorded last month: The Sennheiser=
MKH20
published response is 12Hz-20,000Hz yet when I recorded in my garden as a t=
est I recorded
a bat which had a strong signal ranging from 48kHz-65kHz. This was recorded=
at 192kbps on
a SD 744T. I did see the bat visually, but not well enough to identify it.
See this sonogram: http://www.mikeoates.org/wildlife/img/sonogram-bat.jpg
Ok this is a particular good mic, but what ever you have just try it, it ma=
y work well
above 20kHz.
--------------------
>
>
>Hello all!
>
>I've just noticed a little bat happily flying around in our garden at dusk=
!
>
>
>What microphone would enable me to pick up his high pitched noises?
>
>
>I've got an Fostex FR2 LE recorder, and my Roland FA-66 sound interface fo=
r my computer that goes up to 192khz.
>
>
>Has someone out there tries recording bats before?? I'm presuming its quit=
e hard and a wee bit technical!
>
>If anyone has advice on mics that would be fab! :)
>
>Kind regards,
>
>Ian
>
>
>
|
