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An acoustical model based monitoring network

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Author: Wessels, P.W. · Basten, T.G.H. · Eerden, F.J.M. van der
Type:article
Date:2010
Publisher: The Institute of Noise Control Engineering of the USA
Place: Washington,DC
Source:39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, 13 June 2010 through 16 June 2010, Lisbon, Portugal, 3, 1782-1789
Identifier: 466469
ISBN: 9781617823961
Keywords: Acoustics and Audiology · Acoustics · Monitoring · Network · Outdoor · Real-time · Acoustic model · Acoustical model · Analysis tools · Battery powered · Central stations · Meteorological effects · Monitoring network · Multi-hopping · Noise contours · Noise map · Octave bands · Outdoor · Point sources · Real-time · Sound attenuation · Sound level · Wireless communications · Acoustics · Monitoring · Networks (circuits) · Noise pollution · Wireless telecommunication systems · Acoustic noise · Industrial Innovation · Physics & Electronics · AS - Acoustics & Sonar · TS - Technical Sciences

Abstract

In this paper the approach for an acoustical model based monitoring network is demonstrated. This network is capable of reconstructing a noise map, based on the combination of measured sound levels and an acoustic model of the area. By pre-calculating the sound attenuation within the network the noise map can be shown in real-time. The monitoring network offers an analysis tool for instance for industry or legal authorities. Alternatively, it can be an extension to the EU legislated noise maps. In principle the monitoring network works as follows. Battery powered microphones are deployed in an outdoor area. SPL's are measured in octave bands. Wireless communication and multi-hopping is used to collect the data at a central station. The SPL values are used to localize non-directional point sources, while accounting for obstacles and meteorological effects in the sound attenuation. The final result is a list of reconstructed sources with their locations and strengths and a noise contour map. The monitoring network is scalable and seems feasible and useful for large areas.