Spatio-Temporal Gradient Analysis of Differential Microphone Arrays

Kolundzija M, Vetterli M, Faller C. Spatio-Temporal Gradient Analysis of Differential Microphone Arrays. In: AES Convention 126. Audio Engineering Society; 2009. Paper 7772. Available from: https://aes.org/publications/elibrary-page/?id=14968

@inproceedings{Kolundzija2009_14968,
  author = {Kolundzija, Mihailo and Vetterli, Martin and Faller, Christof},
  title = {{Spatio-Temporal Gradient Analysis of Differential Microphone Arrays}},
  booktitle = {AES Convention 126},
  note = {Paper 7772},
  year = {2009},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14968}
}

TY  - CPAPER
TI  - Spatio-Temporal Gradient Analysis of Differential Microphone Arrays
AU  - Kolundzija, Mihailo
AU  - Vetterli, Martin
AU  - Faller, Christof
T2  - AES Convention 126
M1  - Paper 7772
PY  - 2009
DA  - 2009/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14968
PB  - Audio Engineering Society
LA  - en
AB  - The literature on gradient and differential microphone arrays makes a distinction between the two types, and nevertheless shows how both types can be used to obtain the same directional responses. A more theoretically sound rationale for using delays in differential microphone arrays has not yet been given. This paper presents a gradient analysis of the sound field viewed as a spatio-temporal phenomenon, and gives a theoretical interpretation of the working principles of gradient and differential microphone arrays. It shows that both types of microphone arrays can be viewed as devices for approximately measuring spatio-temporal derivatives of the sound field. Furthermore, it also motivates the design of high-order differential microphone arrays using the aforementioned spatio-temporal gradient analysis.
ER  -