Proximity Effect Detection for Directional Microphones

Clifford A, Reiss J. Proximity Effect Detection for Directional Microphones. In: AES Convention 131. Audio Engineering Society; 2011. Paper 8475. Available from: https://aes.org/publications/elibrary-page/?id=16001

@inproceedings{Clifford2011_16001,
  author = {Clifford, Alice and Reiss, Joshua},
  title = {{Proximity Effect Detection for Directional Microphones}},
  booktitle = {AES Convention 131},
  note = {Paper 8475},
  year = {2011},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16001}
}

TY  - CPAPER
TI  - Proximity Effect Detection for Directional Microphones
AU  - Clifford, Alice
AU  - Reiss, Joshua
T2  - AES Convention 131
M1  - Paper 8475
PY  - 2011
DA  - 2011/10/06
UR  - https://aes.org/publications/elibrary-page/?id=16001
PB  - Audio Engineering Society
LA  - en
AB  - The proximity effect in directional microphones is characterised by an undesired boost in low frequency energy as the source to microphone distance decreases. Traditional methods for reducing the proximity effect use a high pass filter to cut low frequencies which alter the tonal characteristics of the sound and are not dependent on the input source. This paper proposes an intelligent approach to detect the proximity effect in a single capsule directional microphone in real time. The low frequency boost is detected by analysing the spectral flux of the signal over a number of bands over time. A comparison is then made between the bands to indicate the existence of the proximity effect. The proposed method is shown to accurately detect the proximity effect in test recordings of white noise and of other musical inputs. This work has applications in the reduction of the proximity effect.
ER  -