At 7:06 PM +0200 9/4/08, Juan Carlos Blancas Avil=E9s wrote:
>hi raimund and rob, thanks for your responses and info.
>yes, also intuit something related with a-weigjting...
>best regards,
>jc
>
>pd1. in the rough test i didn=B4t match levels, etc., what attracted
>to me was the frecuency distribution of the noise...
>
>pd2. rob, my mkh-60 manual claims for a equivalent sound
>pressure level as per din 45 500 curve A of 10 dB,
>and ccir 468 of 22 dB.
10 dB(A) self-noise is the figure I recalled but
I looked at Sennheiser's current spec sheet and
they seem to have new figures or at least a new
format:
http://www.sennheiserusa.com/newsite/pdfs/mkh60.pdf
The units/standards are a little hard to
interpret. Maybe someone can interpret more
confidently than I.
Here's a movie comparison with matched playback
volume with >60 Hz low frequency attenuation on
the Rode NT1-A. I had to boost the playback level
3 dB on the NT1-A to compensate.
http://tech.groups.yahoo.com/group/naturerecordists/files/MKH60_NT1-A_Compa=
re02.mov
Adjust playback volume to your taste. It should play in a loop.
Adjusted, the difference is now about what I
would expect for mics with 10 dB(A) and 5.5 dB(A)
self-noise respectively. The MKH60's noise is
pronounced in the last two octaves. With the gain
boost, the tonal character of the NT1-A's
self-noise is a little more apparent. Rob D.
>
>El 04/09/2008, a las 16:28, Raimund Specht escribi=F3:
>
>> > 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/>http://tech.g=
roups.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->htt=
p://tech.groups.yahoo.com/group/naturerecordists/files/MKH-60-vs-
>>
>>
>> > if you are already logged in.
>> >
>> > Rob D.
>>
>> Hi Rob,
>>
>> Hmmm, as far as I understand, the two samples were recorded at the
>> same gain settings (+68dB). However, the MKH 60 is more sensitive
>> (40mV/Pa) than the NT1-A (25mV/Pa). So, one had to attenuate the MKH60
>> sample by 4 dB in order to match the absolute sound levels.
>>
>> Raimund
>>
>>
>
>
>
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