Journal article
Spatial resolution limits for the localization of noise sources using direct sound mapping
One of the main challenges arising from noise and vibration problems is how to identify the areas of a device, machine or structure that produce significant acoustic excitation, i.e. the localization of main noise sources. The direct visualization of sound, in particular sound intensity, has extensively been used for many years to locate sound sources.
However, it is not yet well defined when two sources should be regarded as resolved by means of direct sound mapping. This paper derives the limits of the direct representation of sound pressure, particle velocity and sound intensity by exploring the relationship between spatial resolution, noise level and geometry.
The proposed expressions are validated via simulations and experiments. It is shown that particle velocity mapping yields better results for identifying closely spaced sound sources than sound pressure or sound intensity, especially in the acoustic near-field. (C) 2016 Elsevier Ltd. All rights reserved.
| Language: | English |
|---|---|
| Publisher: | Elsevier BV |
| Year: | 2016 |
| Pages: | 53-62 |
| ISSN: | 10958568 and 0022460x |
| Types: | Journal article |
| DOI: | 10.1016/j.jsv.2016.04.010 |
| ORCIDs: | Fernandez Grande, Efren , 0000-0003-3286-6637 and 0000-0001-7439-2375 |
ACOUSTICS Acoustic noise, its effects and control Direct sound mapping ENGINEERING, FIELD MECHANICS Measurement of acoustic variables Source localization Spatial resolution Structural acoustics and vibration acoustic excitation acoustic field acoustic intensity measurement acoustic near-field acoustic noise direct sound mapping noise level noise source localization particle velocity sound intensity sound pressure spatial resolution limits vibration vibrations
