Complex Modulation Transfer Function and Its Applications in Transducer and Room Acoustics Measurements

Backman J. Complex Modulation Transfer Function and Its Applications in Transducer and Room Acoustics Measurements. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8172. Available from: https://aes.org/publications/elibrary-page/?id=15595

@inproceedings{Backman2010_15595,
  author = {Backman, Juha},
  title = {{Complex Modulation Transfer Function and Its Applications in Transducer and Room Acoustics Measurements}},
  booktitle = {AES Convention 129},
  note = {Paper 8172},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15595}
}

TY  - CPAPER
TI  - Complex Modulation Transfer Function and Its Applications in Transducer and Room Acoustics Measurements
AU  - Backman, Juha
T2  - AES Convention 129
M1  - Paper 8172
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15595
PB  - Audio Engineering Society
LA  - en
AB  - Modulation transfer function is in audio applications describes well the clarity of sound, but conventional definitions and measurement methods are not easily applicable to transducer measurements, low-frequency acoustics, or capturing effects of narrow-band phenomena. A revised definition of modulation transfer function, taking into account the magnitude and phase of modulation transfer for each carrier and modulator frequency combination is presented. This function is derived from the complex frequency response by analyzing the response at the carrier frequency and at the modulation sidebands. Also the distortion of modulation envelope arising from the asymmetry especially in the phase transfer properties is discussed. Examples of the use of the complex modulation transfer function are presented for simple filters, anechoic response measurements of loudspeakers, and for loudspeakers in rooms.
ER  -