A Stepped Acoustic Transmission Line Model of Interference Tubes for Microphones

Bigoni F, Agerkvist FT, Brixen EB. A Stepped Acoustic Transmission Line Model of Interference Tubes for Microphones. In: AES Convention 145. Audio Engineering Society; 2018. Paper 10094. Available from: https://aes.org/publications/elibrary-page/?id=19820

@inproceedings{Bigoni2018_19820,
  author = {Bigoni, Francesco and Agerkvist, Finn T. and Brixen, Eddy Bøgh},
  title = {{A Stepped Acoustic Transmission Line Model of Interference Tubes for Microphones}},
  booktitle = {AES Convention 145},
  note = {Paper 10094},
  year = {2018},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19820}
}

TY  - CPAPER
TI  - A Stepped Acoustic Transmission Line Model of Interference Tubes for Microphones
AU  - Bigoni, Francesco
AU  - Agerkvist, Finn T.
AU  - Brixen, Eddy Bøgh
T2  - AES Convention 145
M1  - Paper 10094
PY  - 2018
DA  - 2018/10/06
UR  - https://aes.org/publications/elibrary-page/?id=19820
PB  - Audio Engineering Society
LA  - en
AB  - This paper presents an extension of the standing-wave model of interference tubes for microphones by Ono et al. The original model accounts for three acoustic parameters: tube length, tube radius, and constant acoustic conductance per unit length. Our extension allows a varying conductance per unit length along the side wall. The assumptions behind the extended model and its ability to predict the frequency response of interference tubes are validated through simulations and by fitting the model parameters to frequency response measurements of a tube with varying conductance per unit length, using two different mountings. Results suggest that a tube with varying conductance per unit length is most effective at attenuating the off-axis sound if the conductance per unit length is decreased towards the tail end of the tube.
ER  -