3D recording microphone M Cube

universalcapacitoromnidirectional

The M Cube is a 9-channel microphone system for time-delay based 3-dimensional recordings. The omni-directional pressure capacitor mics are arranged in the shape of a cube with a length of approximately one metre each side. There positions are adjustable – so the mic arrangement dimensions can be adjusted to the room and sound source dimensions. The mounting bars have distance markings, so that any setting can easily be repeated. 5 M 102 mics are used for the lower plane and 4 M 221 mics are used for the upper plane. Because of this, the frequency response is independent from the distance to the sound source and there is no proximity effect; sensitivity to wind noise is very low. The use of certified WS1F- and WS2F- measurement capsules, combined with a 48 V phantom powered pre-amplifier reaches a constant magnitude and phase response according to the tight tolerances of DIN EN 61094-4 and long-term stable transmission properties. Because of the high sensitivity of the mics, a lower level of pre-amplification is necessary. This results in a lower noise level in the recording. The optional use of the acoustic equalisation balls for the M 221 results in an additional acoustic amplification in the high frequencies. All capsule parts, including the diaphragm – are made of nickel, so they are very insensitive to temperature changes and to changes of humidity in the air A standard sound calibrator can be used to supply the mics with an accurately defined sound pressure level. Thereby all the mics can be adjusted to an equal amplification and also the following equipment can be optimally adjusted to the expected sound pressure level at the mic position.