Cardioids
 Microphone Capsule MK 4
Compact Microphone CCM 4
- cardioid pattern well maintained throughout the frequency
range
- for universal application
The MK 4 and CCM 4 are optimized for maximum rejection of
rear-incident sound. Typical of the classic cardioid, at
90° to its axis the attenuation is 6 dB, while from the
rear (180°) it can be as much as 30 dB, depending on
the frequency. The random-energy efficiency* – the
ratio of on-axis sensitivity to diffuse sound field efficiency – is
4.8 dB. (The higher this figure, the less “room sound” is
picked up by a microphone, and the less susceptible it is
to acoustic feedback.)
Due to its directivity, the MK 4/ CCM 4 can be placed 1.7
times farther from the sound source than a pressure transducer
of equivalent sensitivity, while maintaining the same proportion
of direct and reverberant sound. In the diffuse sound field
(distant from a sound source in a room, for instance), this
microphone type has flat frequency response except for a
slight emphasis around 10 kHz.
 Microphone Capsule MK 4V
Compact Microphone CCM 4V
- cardioid for lateral pickup
- for universal application
- slight high-frequency emphasis
The MK 4V and CCM 4V were created in answer to requests
for a cardioid microphone whose main axis is along the side
of the capsule. In addition to its usefulness in the concert
hall, this microphone type is of particular value in speech
recording, since its slight emphasis around 10 kHz helps
to improve intelligibility.
The directional response is especially well maintained even
at higher frequencies, due to the acoustically transparent
housing. High-frequency emphasis of off-axis sound – typical
of most small axial-response cardioids – occurs less
with the MK 4V/ CCM 4V, but because of its inherent frequency
response, it still sounds somewhat brighter overall than
the MK 4 or CCM 4.
Surface finish : matte gray (g) or nickel (ni)
Note:
Although our normal production tolerances are very close,
we can deliver specially matched capsule or Compact Microphone
pairs for a small extra charge.
*The random-energy efficiency
is the ratio of on-axis sensitivity to diffuse sound field
efficiency. The larger it is, the higher the suppression
of diffuse or reflected sound. The random-energy is frequency-dependent
and rises towards high frequencies. |
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