Modelling the pressure field in the vicinity of a microphone membrane using PIV

O. Richoux; A. Degroot; B. Gazengel; R. MacDonald; M. Campbell

doi:10.1016/j.apacoust.2009.07.006

Modelling the pressure field in the vicinity of a microphone membrane using PIV

O. Richoux, A. Degroot, B. Gazengel, R. MacDonald, M. Campbell

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

A new approach for estimating the acoustic pressure in the near field of a microphone based on non-intrusive direct measurement of acoustic particle velocity is proposed.

This method enables the estimation of the acoustic pressure inside a domain located in front of the microphone membrane. The acoustic pressure is calculated using the acoustic particle velocity on the frontiers of this domain and a physical model based on the Green function of the system.

Results are obtained using the acoustic velocity measured with Particle Image Velocimetry (PIV) in front of a microphone excited with a plane wave inside a rectangular waveguide. They show that the diffraction of the plane wave by the microphone leads to an increase of the acoustic pressure on the microphone edge in the order of magnitude of 0.1 dB. (C) 2009 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	157-163
Number of pages	7
Journal	Applied Acoustics
Volume	71
Issue number	2
DOIs	https://doi.org/10.1016/j.apacoust.2009.07.006
Publication status	Published - Feb 2010

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10.1016/j.apacoust.2009.07.006

Cite this

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title = "Modelling the pressure field in the vicinity of a microphone membrane using PIV",

abstract = "A new approach for estimating the acoustic pressure in the near field of a microphone based on non-intrusive direct measurement of acoustic particle velocity is proposed.This method enables the estimation of the acoustic pressure inside a domain located in front of the microphone membrane. The acoustic pressure is calculated using the acoustic particle velocity on the frontiers of this domain and a physical model based on the Green function of the system.Results are obtained using the acoustic velocity measured with Particle Image Velocimetry (PIV) in front of a microphone excited with a plane wave inside a rectangular waveguide. They show that the diffraction of the plane wave by the microphone leads to an increase of the acoustic pressure on the microphone edge in the order of magnitude of 0.1 dB. (C) 2009 Elsevier Ltd. All rights reserved.",

author = "O. Richoux and A. Degroot and B. Gazengel and R. MacDonald and M. Campbell",

year = "2010",

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doi = "10.1016/j.apacoust.2009.07.006",

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T1 - Modelling the pressure field in the vicinity of a microphone membrane using PIV

AU - Richoux, O.

AU - Degroot, A.

AU - Gazengel, B.

AU - MacDonald, R.

AU - Campbell, M.

PY - 2010/2

Y1 - 2010/2

N2 - A new approach for estimating the acoustic pressure in the near field of a microphone based on non-intrusive direct measurement of acoustic particle velocity is proposed.This method enables the estimation of the acoustic pressure inside a domain located in front of the microphone membrane. The acoustic pressure is calculated using the acoustic particle velocity on the frontiers of this domain and a physical model based on the Green function of the system.Results are obtained using the acoustic velocity measured with Particle Image Velocimetry (PIV) in front of a microphone excited with a plane wave inside a rectangular waveguide. They show that the diffraction of the plane wave by the microphone leads to an increase of the acoustic pressure on the microphone edge in the order of magnitude of 0.1 dB. (C) 2009 Elsevier Ltd. All rights reserved.

AB - A new approach for estimating the acoustic pressure in the near field of a microphone based on non-intrusive direct measurement of acoustic particle velocity is proposed.This method enables the estimation of the acoustic pressure inside a domain located in front of the microphone membrane. The acoustic pressure is calculated using the acoustic particle velocity on the frontiers of this domain and a physical model based on the Green function of the system.Results are obtained using the acoustic velocity measured with Particle Image Velocimetry (PIV) in front of a microphone excited with a plane wave inside a rectangular waveguide. They show that the diffraction of the plane wave by the microphone leads to an increase of the acoustic pressure on the microphone edge in the order of magnitude of 0.1 dB. (C) 2009 Elsevier Ltd. All rights reserved.

U2 - 10.1016/j.apacoust.2009.07.006

DO - 10.1016/j.apacoust.2009.07.006

M3 - Article

SN - 0003-682X

VL - 71

SP - 157

EP - 163

JO - Applied Acoustics

JF - Applied Acoustics

IS - 2

ER -

Modelling the pressure field in the vicinity of a microphone membrane using PIV

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