I've only listened through an 815b and not really
recorded with one, but its safe to regard it as
in a different class with the MKH-70. I believe
the difference between the s-n number and the
94dB reference produces a comparable self noise
spec or, about 24 dBA for the 815b vs. 5dBA for
the Sennhesier. Please correct me folks if I'm
wrong about this. The mkh 70 has greater
sensitivity too. One needs a quality,
phantom-powered mic preamp for the MKH-70 to show
its best stuff. The 815b will run on a 9volt bat
which, I assume, is a big reason for its
popluarity. Looks like the 815b's self noise is
on par with that of a consumer MD mic input. Rob
D.
=3D =3D
>Hi again,
> how I could compare the declared self noise in the Audio Technic=
a
>AT-815 with the values declared by Sennheiser for the MKH-70 ?
>
>AT-815
>Open Circuit Sensitivity
>PHANTOM: -38 dB (12.5 mV) re 1V at 1 Pa
>BATTERY: -39 dB (11.2 mV) re 1V at 1 Pa
>Signal to Noise Ratio
>70 dB, 1 kHz at 1 Pa
>
>MKH-70
>Sensitivity in free field, no load (1kHz) : 50 mV/Pa
>Equivalent noise level : 5 dB
>Equivalent noise level weighted as per CCIR 468-3 : 16 dB
>
>--------------------------------------------------------------
>Gianni Pavan
>Email
>Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
>Universita' degli Studi di Pavia
>Via Taramelli 24, 27100 PAVIA, ITALIA
>Tel=A0 +39-0382-507874
>Fax +39-02-700-32921
>Web http://www.unipv.it/cibra
>
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>
--
Rob Danielson
Film Department
University of Wisconsin-Milwaukee
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