The CCM 22 has been developed for use as a spot microphone. It unites the strengths of the CCM 4 and CCM 21 microphones. Its directionality is only slightly less than that of the CCM 4 cardioid, while its sonic character is reminiscent of the CCM 21 wide cardioid. Its directivity is essentially constant throughout the frequency range. Its inherent low-frequency response is somewhat more pronounced than that of the cardioid, while proximity effect is somewhat less.
The “Open Cardioid” directional pattern, occupying a point on the spectrum between the wide cardioid and classic cardioid patterns, was developed by SCHOEPS in 2008. The response is -5 dB at 90° and there is 16 dB suppression of rear-incident sound. It is in essence a variant of a cardioid which balances a very natural sound quality with a good degree of directionality.