Modeling of Leaky Acoustic Tube for Narrow-Angle Directional Microphone

Ando A, Chiba Y, Hamasaki K, Imanaga K, Ishii T, Ono K, Sugimoto T. Modeling of Leaky Acoustic Tube for Narrow-Angle Directional Microphone. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8216. Available from: https://aes.org/publications/elibrary-page/?id=15638

@inproceedings{Ando2010_15638,
  author = {Ando, Akio and Chiba, Yutaka and Hamasaki, Kimio and Imanaga, Keishi and Ishii, Takeshi and Ono, Kazuho and Sugimoto, Takehiro},
  title = {{Modeling of Leaky Acoustic Tube for Narrow-Angle Directional Microphone}},
  booktitle = {AES Convention 129},
  note = {Paper 8216},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15638}
}

TY  - CPAPER
TI  - Modeling of Leaky Acoustic Tube for Narrow-Angle Directional Microphone
AU  - Ando, Akio
AU  - Chiba, Yutaka
AU  - Hamasaki, Kimio
AU  - Imanaga, Keishi
AU  - Ishii, Takeshi
AU  - Ono, Kazuho
AU  - Sugimoto, Takehiro
T2  - AES Convention 129
M1  - Paper 8216
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15638
PB  - Audio Engineering Society
LA  - en
AB  - Line microphones have been popular as narrow directional microphones for a long time. Their structure adopts a leaky acoustical tube with many slits to suppress off-axis sensitivity, together with a directional capsule attached to this tube. Although many microphones of this type are on the market, we have no quantitative theory to explain its behavior, which is very important for effectively designing directivity. We thus modeled the leaky acoustical tube using a distributed equivalent circuit and combined it with the directional capsule’s equivalent circuit model. The analysis showed that the model agreed well with the measurement results, particularly at the directional characteristics, while an ordinary model of acoustical tube using delay and sum modeling did not.
ER  -