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Design and implementation of a multi-octave-band audio camera for realtime diagnosis
- Source :
- Applied Acoustics, Applied Acoustics, Elsevier, 2015, 89, pp.281-287. ⟨10.1016/j.apacoust.2014.10.009⟩, Applied Acoustics, 2015, 89, pp.281-287. ⟨10.1016/j.apacoust.2014.10.009⟩
- Publication Year :
- 2016
-
Abstract
- International audience; Noise pollution investigation takes advantage of two common methods of diagnosis: measurement using a Sound Level Meter and acoustical imaging. The former enables a detailed analysis of the surrounding noise spectrum whereas the latter is rather used for source localization. Both approaches complete each other, and merging them into a unique system, working in realtime, would offer new possibilities of dynamic diagnosis. This paper describes the :design of a complete system for this purpose: imaging in realtime the acoustic field at different octave bands, with a convenient device. The acoustic field is sampled in time and space using an array of MEMS microphones. This recent technology enables a compact and fully digital design of the system. However, performing realtime imaging with resource-intensive algorithm on a large amount of measured data confronts with a technical challenge. This is overcome by executing the whole process on a Graphic Processing Unit, which has recently become an attractive device for parallel computing.
- Subjects :
- Engineering
Microphone array
Realtime
Acoustic imaging
Physics - Instrumentation and Detectors
Acoustics and Ultrasonics
Octave band
GPU
FOS: Physical sciences
Noise spectrum
01 natural sciences
[SPI]Engineering Sciences [physics]
Computer graphics (images)
0103 physical sciences
Octave
Sound level meter
[PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
010301 acoustics
ComputingMilieux_MISCELLANEOUS
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]
010302 applied physics
Microelectromechanical systems
business.industry
Noise pollution
Process (computing)
Instrumentation and Detectors (physics.ins-det)
[PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
MEMS
business
[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Computer hardware
Subjects
Details
- Language :
- English
- ISSN :
- 0003682X
- Database :
- OpenAIRE
- Journal :
- Applied Acoustics, Applied Acoustics, Elsevier, 2015, 89, pp.281-287. ⟨10.1016/j.apacoust.2014.10.009⟩, Applied Acoustics, 2015, 89, pp.281-287. ⟨10.1016/j.apacoust.2014.10.009⟩
- Accession number :
- edsair.doi.dedup.....0b99c50f5e1c006220fa1b10cd9a8267