If you are powering the ME66 with a internal battery you will get this =93n=
oise.=94 Use phantom power only and you will not get these tones.
Wil Hershberger
Nature Images and Sounds, LLC
Hedgesville, WV
The Songs of Insects
My Blog
On Oct 25, 2014, at 11:33 PM, [naturerecordists] <natur=
> wrote:
>
>
> Hey all,
>
>
>
> I posted here a few months back about accidentally capturing some high fr=
equency bat pulses with my inexpensive Studio Concepts microphones. Well =
I was out this evening recording some insects and I thought I might try and=
compare the ability of my Sennheiser ME-66 to capture bats in comparison. =
There were a few bats flying over, but I didn't manage to get any ultrasou=
nd recorded with the Sennheiser nor my Studio Concepts mics.
>
>
>
> However, when I pulled up the file in Audacity, I was surprised to see a =
very "loud" and narrow band on the spectrogram for the Sennheiser right aro=
ud 39.2 KHz and another distinct band at 78.4 KHz. These were not present =
in the recording on the other mic which was recording simultaneously into a=
nother channel.
>
>
>
> I have saved a copy of the plot of the spectrogram from audacity and you =
can clearly see the 39K and 78K spikes. - http://m3.i.pbase.com/g9/15/9151=
15/2/157978583.HGw2QuBi.jpg
>
>
> http://m3.i.pbase.com/g9/15/915115/2/157978583.HGw2QuBi....
> View on m3.i.pbase.com
> Preview by Yahoo
>
>
> What on earth is going on here? Is this HF internal tone being generated=
by the microphone? (It must be since the other mic didn't have it).
>
>
>
> TIA,
>
>
>
> Chris
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>
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