Microphone polar pattern with 4.8dB directivity index that reduces side noise by 12–18dB and captures controlled room ambience via a rear lobe at 180°.
Technical Details
Hypercardioid microphones achieve a directivity index of approximately 4.8dB, offering 1.8dB greater directivity than standard cardioid microphones (3dB). The frequency response typically remains linear between 40Hz and 20kHz, with directivity decreasing at higher frequencies from 8kHz upwards. Rear rejection ranges from -15dB to -20dB between 120°-240°, while at exactly 180° the characteristic null of sensitivity appears from -6dB to -12dB. Condenser hypercardioid microphones achieve self-noise levels of 7-15dB-A, while dynamic variants are at 18-22dB-A.
History & Development
The hypercardioid polar pattern was developed in 1959 by Georg Neumann and first implemented as a switchable option in the U67 tube microphone. In 1973, Schoeps introduced modular hypercardioid capsules with the CMC system, which quickly became established in film sound. In 1981, Sennheiser released the MKH 416 as the first dedicated hypercardioid shotgun microphone for professional film use. Since 2010, modern digital signal processing has enabled adaptive hypercardioid characteristics that automatically adjust to the environment.
Practical Application in Film
Hypercardioid microphones dominate dialogue recording in controlled environments where precise directivity is desired without complete rear isolation. Christopher Nolan's sound mixer Richard King uses Schoeps CMIT 5U hypercardioids for interior recordings, as the 180° null captures room reverb intentionally. On "Mad Max: Fury Road," Sennheiser MKH 50 hypercardioids allowed for the recording of vehicle dialogue despite wind machines positioned to the side of the camera. The low side sensitivity reduces film equipment noise by 12-18dB compared to omnidirectional microphones, while boom operators can capture controlled room atmosphere through the rear null.
Comparison & Alternatives
Compared to cardioid microphones, hypercardioids offer 40% better side rejection but lose 20% of natural room ambience. Shotgun microphones achieve 8-12dB higher directivity but create comb filtering effects in enclosed spaces. Omnidirectional microphones capture sound uniformly from 360° but are not suitable for selective recording. Modern line arrays like the Rycote HC-22 combine eight hypercardioid elements for adaptive directivity. For exterior recordings with wind, short shotgun microphones dominate, while in studios, sound mixers prefer hypercardioids for controlled room imaging without interference.