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CBM1 Omni Directional Boundary Microphone |
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The model CBM1 microphone is a boundary type microphone that
allows excellent pickup even from a distance. Typical studio
microphones are designed to operate in close proximity to a
sound source. When the sound source is not in close proximity
the studio microphone receives both the direct sound plus the
delayed reflected sound out of phase. Response anomalies are
caused by the out of sync direct and reflected sound received by
the microphone. Gold Line boundary microphones solve this
problem by receiving signals from both direct and reflected
paths at the same time, and in phase. The CBM1 places a small
transducer at the boundary zone where direct and reflected waves
act as a single reinforced signal. In this configuration, both
direct and reflected sound occur very close together in time
which means that the response over the microphone diaphragm is
immune to changes in either amplitude or phase. This guarantees
that no pressure build-up due to strong reflections can occur on
axis. The high degree of directionality inherent to the typical
studio microphone can be replaced by the CBM1 boundary
microphone which picks up sound in a fashion that resembles the
human ear. Boundary microphones offer several distinct
advantages over standard studio designs. They provide flat
frequency microphone response without equalization and they
maintain a more consistent sound quality as the sound source
moves along the surface of its hemispherical pickup pattern.
This technology also yields a more predictable sound field
without interfering reflections, maintaining clarity of pickup
even at a distance. Since clarity is maintained, even at a
distance, the sound is more natural than would be the case if
the recording had been made with conventional dynamic
microphones. When preserving the ambiance of either a studio or
concert hall, boundary microphones are ideal. |
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Features |
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Additional Benefits For Boundary Microphones |
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Freedom of Movement |
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Distortion Free at High SPLS |
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Applications: |
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Theater and Video
Production |
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Sound Reinforcement on the Set |
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Reinforcing the Sound Stage |
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Church Applications |
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Specifications |
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| Microphone: |
Built-in omnidirectional
electret condenser. |
| Output: |
XLR 3 pin plug. Balanced
circuit |
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Pin 1 - Ground, Pin 2 -
Hot, Pin 3 - Neutral. |
| Output Impedance: |
600 ohms |
| Frequency
Response: |
20Hz - 20kHz |
| Dynamic
Range: |
28dB - 121dB. |
| Filters: |
Flat: normal response. |
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Boost: +6dB. |
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Cut: -6dB. |
| Power Requirements: |
Battery: 9V alkaline. |
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Phantom: 12Vdc to 48Vdc |
| Size (W x H x
D); |
2½" x 1.625"
x 4.75" |
| Weight: |
8 oz. |
| Case Material: |
Painted Aluminum |
| Approvals: |
CE, RoHS and WEEE |
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