Diffuse-field equalization
A diffuse-field-equalized microphone with omnidirectional characteristics has a linear, i.e. transparent frequency response in an ideal diffuse field.
A diffuse-field-equalized microphone with omnidirectional characteristics has a linear, i.e. transparent frequency response in an ideal diffuse field.
Omnidirectional microphones (also called pressure transducers), which have no directivity in the low frequency range, become increasingly directive towards high frequencies (from approx. 4 kHz) due to the pressure buildup effect and rear-shading of the sound. As a result, the diffuse field frequency response above 4 kHz increasingly differs from the free-field curve.
A diffuse-field-equalized pressure transducer shows a linear diffuse field frequency response. The SCHOEPS MK 2XS is such a microphone capsule. At the same time, the free-field frequency response of the MK 2XS is overemphasized in the highs.
For example, a diffuse-field-equalized microphone capsule can be used to pick up distant room sound outside the reverberation radius.