Schoeps CCM 2, Руководство пользователя

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SCHOEPS
GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 (0)721 943 20-0 · Fax: +49 (0)721 943 2050
www.schoeps.de · mailbox@schoeps.de
Acoustical Specifications of Compact Microphones
19
Microphone T
ypes
microphone type polar frequency sensitivity equivalent noise level signal-to-noise max. SPL
pattern range CCIR A-weighted ratio (0,5%THD)
A-weighted
CCM 2 omni 20 Hz – 20 kHz 16 mV/Pa 23 dB 11 dB 83 dB 130 dB
CCM 2H omni 20 Hz – 20 kHz 15 mV/Pa 23 dB 11 dB 83 dB 130 dB
CCM 2S omni 20 Hz – 20 kHz 12 mV/Pa 24 dB 12 dB 82 dB 132 dB
CCM 3 omni 20 Hz – 20 kHz 10 mV/Pa 26 dB 14 dB 80 dB 134 dB
CCM 21 wide cardioid 30 Hz – 20 kHz 13 mV/Pa 24 dB 14 dB 80 dB 132 dB
CCM 21H wide cardioid 30 Hz – 20 kHz 10 mV/Pa 26 dB 16 dB 78 dB 134 dB
CCM 22 Open Cardioid 40 Hz – 20 kHz 14 mV/Pa 23 dB 14 dB 80 dB 131 dB
CCM 4 cardioid 40 Hz – 20 kHz 13 mV/Pa 24 dB 15 dB 79 dB 132 dB
CCM 4V cardioid 40 Hz – 20 kHz 13 mV/Pa 24 dB 14 dB 80 dB 132 dB
CCM 41 supercardioid 40 Hz – 20 kHz 14 mV/Pa 24 dB 15 dB 79 dB 132 dB
CCM 41V supercardioid 40 Hz – 20 kHz 14mV/Pa 23 dB 14 dB 80 dB 132 dB
CCM 8 figure-8 40 Hz – 16 kHz 10 mV/Pa 26 dB 18 dB 76 dB 134 dB
CCM 5 omni 20 Hz – 20 kHz 10 mV/Pa 26 dB 14 dB 80 dB 133 dB
cardioid 40 Hz – 20 kHz 13 mV/Pa 24 dB 15 dB 79 dB 132 dB
CCM 4S cardioid 80 Hz – 20 kHz 12 mV/Pa 25 dB 15 dB 79 dB 132 dB
CCM 40 cardioid 80 Hz – 20 kHz 18 mV/Pa 22 dB 12 dB 82 dB 129 dB
CCM 4A cardioid close pickup 3 mV/Pa 31 dB 19 dB 75 dB 144 dB
CCM 4VXS cardioid close pickup 10 mV/Pa 25 dB 14 dB 80 dB 134 dB
CCM 41S supercardioid 80 Hz – 20 kHz 13 mV/Pa 24 dB 14 dB 80 dB 132 dB
A note about signal-to-noise specifications for
studio microphones. The standard method,
which
SCHOEPS
follows, is really just an alter-
nate way of stating a microphone's equivalent
noise level. It is designed to allow comparison
of noise floor levels for different microphones.
Unlike the signal-to-noise specifications for
other types of audio equipment, which give
the ratio of a component's clipping point to its
noise floor, these values do not indicate a
microphone's entire available dynamic range.
Instead, the values are measured with reference
to a standard sound pressure level of 1 Pascal
(1 Pa = 94 dB SPL). But the actual maximum
SPL capability of any usable microphone exceeds
that reference level substantially. The signal-to-
noise specifications of our microphones would
be 35 to 40 dB greater if the “hi-fi” approach
were used.
The use of “A” weighting when specifying
the equivalent noise level of microphones is
another frequently misunderstood aspect of the
standards. “A” weighting yields a distinctly
lower noise specification – mostly by 10 dB or
more – and this figure, of course, becomes the
one most often cited in advertising. In practice,
however, the CCIR weighted noise level may
well be a more accurate indicator of a micro-
phone's perceived noise level.