At 1:12 PM +0000 9/4/08, Raimund Specht wrote:
>Juan Carlos Blancas Avil=E9s <> wrote:
>
>> when recording with sennheiser mkh 30/60 in empty rooms,
>> very quiet nature ambiences or with a high gain preamp setting
>> (pro grear) i listen clearly and see later in the RTA a strange emphasi=
s
>> noise curve from +-5khz to 20khz ...
>>
>> this happen the same way to both mkh, but not at all to any other
>> of my mics ... any thoughts? maybe mkh doesn=B4t like silence?...
>>
>> i=B4m also asking directly to sennheiser germany for curiosity...
>> spanish sennheiser tech service says that my mics are calibrated
>> but nothing more...
>
>Yes, this is the normal behavior of the Sennheiser MKH series
>microphones. Their noise performance has obviously been adapted to the
>properties of the human hearing system. Their increased noise floor
>above 5 kHz matches pretty well the attenuation of the A-weighting
>curve at those frequencies.
>
>See also
><http://en.wikipedia.org/wiki/A-weighting>http://en.wikipedia.org/wiki/A-w=
eighting
>and
><http://www.avisoft.com/test/noisefloors.pdf>http://www.avisoft.com/test/n=
oisefloors.pdf
>
>Regards,
>Raimund
>
Hi Raimund--
I agree that weighting could be playing a role,
but there seems to be a lot of audible difference
to account for:
see:
http://tech.groups.yahoo.com/group/naturerecordists/files/
LOG IN and scroll down to the file:
or
http://tech.groups.yahoo.com/group/naturerecordists/files/MKH-60-vs-NT1-A_R=
if you are already logged in.
Rob D.
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