Near field acoustic holography with microphones on a rigid sphere (L)

Finn Jacobsen; Guillermo Moreno-Pescador; Efren Fernandez-Grande; Jørgen Hald

doi:10.1121/1.3575603

Near field acoustic holography with microphones on a rigid sphere (L)

Finn Jacobsen, Guillermo Moreno-Pescador, Efren Fernandez-Grande, Jørgen Hald

42 Citations (Scopus)

Abstract

Spherical near field acoustic holography (spherical NAH) is a technique that makes it possible to reconstruct the sound field inside and just outside a spherical surface on which the sound pressure is measured with an array of microphones. This is potentially very useful for source identification. The sphere can be acoustically transparent or it can be rigid. A rigid sphere is somewhat more practical than an open sphere. However, spherical NAH based on a rigid sphere is only valid if it can be assumed that the sphere has a negligible influence on the incident sound field, and this is not necessarily a good assumption when the sphere is very close to a radiating surface. This Letter examines the matter through simulations and experiments.

Original language	English
Journal	The Journal of the Acoustical Society of America
Volume	129
Issue number	6
Pages (from-to)	3461-4
Number of pages	4
ISSN	0001-4966
DOIs	https://doi.org/10.1121/1.3575603
Publication status	Published - Jun 2011
Externally published	Yes

Keywords

Acoustics/instrumentation
Computer Simulation
Equipment Design
Holography/instrumentation
Models, Theoretical
Motion
Numerical Analysis, Computer-Assisted
Pressure
Signal Processing, Computer-Assisted
Sound
Sound Spectrography
Time Factors
Transducers, Pressure

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10.1121/1.3575603

Cite this

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title = "Near field acoustic holography with microphones on a rigid sphere (L)",

abstract = "Spherical near field acoustic holography (spherical NAH) is a technique that makes it possible to reconstruct the sound field inside and just outside a spherical surface on which the sound pressure is measured with an array of microphones. This is potentially very useful for source identification. The sphere can be acoustically transparent or it can be rigid. A rigid sphere is somewhat more practical than an open sphere. However, spherical NAH based on a rigid sphere is only valid if it can be assumed that the sphere has a negligible influence on the incident sound field, and this is not necessarily a good assumption when the sphere is very close to a radiating surface. This Letter examines the matter through simulations and experiments.",

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note = "{\textcopyright} 2011 Acoustical Society of America",

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doi = "10.1121/1.3575603",

language = "English",

volume = "129",

pages = "3461--4",

journal = "Acoustical Society of America. Journal",

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TY - JOUR

T1 - Near field acoustic holography with microphones on a rigid sphere (L)

AU - Jacobsen, Finn

AU - Moreno-Pescador, Guillermo

AU - Fernandez-Grande, Efren

AU - Hald, Jørgen

PY - 2011/6

Y1 - 2011/6

N2 - Spherical near field acoustic holography (spherical NAH) is a technique that makes it possible to reconstruct the sound field inside and just outside a spherical surface on which the sound pressure is measured with an array of microphones. This is potentially very useful for source identification. The sphere can be acoustically transparent or it can be rigid. A rigid sphere is somewhat more practical than an open sphere. However, spherical NAH based on a rigid sphere is only valid if it can be assumed that the sphere has a negligible influence on the incident sound field, and this is not necessarily a good assumption when the sphere is very close to a radiating surface. This Letter examines the matter through simulations and experiments.

AB - Spherical near field acoustic holography (spherical NAH) is a technique that makes it possible to reconstruct the sound field inside and just outside a spherical surface on which the sound pressure is measured with an array of microphones. This is potentially very useful for source identification. The sphere can be acoustically transparent or it can be rigid. A rigid sphere is somewhat more practical than an open sphere. However, spherical NAH based on a rigid sphere is only valid if it can be assumed that the sphere has a negligible influence on the incident sound field, and this is not necessarily a good assumption when the sphere is very close to a radiating surface. This Letter examines the matter through simulations and experiments.

KW - Acoustics/instrumentation

KW - Computer Simulation

KW - Equipment Design

KW - Holography/instrumentation

KW - Models, Theoretical

KW - Motion

KW - Numerical Analysis, Computer-Assisted

KW - Pressure

KW - Signal Processing, Computer-Assisted

KW - Sound

KW - Sound Spectrography

KW - Time Factors

KW - Transducers, Pressure

U2 - 10.1121/1.3575603

DO - 10.1121/1.3575603

M3 - Journal article

C2 - 21682371

SN - 0001-4966

VL - 129

SP - 3461

EP - 3464

JO - Acoustical Society of America. Journal

JF - Acoustical Society of America. Journal

IS - 6

ER -

Near field acoustic holography with microphones on a rigid sphere (L)

Abstract

Keywords

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