Automatic Corrective EQ for Measurement Microphone Emulation

Cheshire M, Smith S, Ali-MacLachlan I. Automatic Corrective EQ for Measurement Microphone Emulation. In: Convention Paper. Audio Engineering Society; 2024. Paper 10202. Available from: https://aes.org/publications/elibrary-page/?id=22705

@inproceedings{Cheshire2024_22705,
  author = {Cheshire, Matthew and Smith, Samuel and Ali-MacLachlan, Islah},
  title = {{Automatic Corrective EQ for Measurement Microphone Emulation}},
  note = {Paper 10202},
  year = {2024},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22705}
}

TY  - CPAPER
TI  - Automatic Corrective EQ for Measurement Microphone Emulation
AU  - Cheshire, Matthew
AU  - Smith, Samuel
AU  - Ali-MacLachlan, Islah
M1  - Paper 10202
PY  - 2024
DA  - 2024/09/27
UR  - https://aes.org/publications/elibrary-page/?id=22705
PB  - Audio Engineering Society
LA  - en
AB  - This study investigates automatic corrective equalisation (EQ) to adjust the frequency response of microphones with non-flat responses to match that of a flat frequency response measurement microphone. Non-flat responses in microphones can cause significant colouration, necessitating correction for accurate sound capture, particularly in spectral analysis scenarios. To address this, 10 non-flat microphones were profiled in an anechoic chamber, and a 1/3 octave digital graphic equaliser (GEQ) was employed to align their spectra with that of an industry-standard reference microphone. The systems performance was evaluated using acoustic guitar recordings, measuring spectral similarity between Pre- and Post-Corrected recordings and the reference microphone with objective metrics. Results demonstrated improvements in spectral similarity across the metrics, confirming the methods effectiveness in correcting frequency response irregularities. However, limitations such as the inability to account for proximity effects suggest the need for further refinement and validation in diverse acoustic environments.
ER  -