Traceable sound power measurements in essentially diffuse or free fields
2016 (English)In: Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, 2016, p. 6783-6792Conference paper, Published paper (Other academic)
Abstract [en]
Current methods for the determination of sound power such as the ISO 3740 series do not have a direct traceability to a primary standard. The different methods are regarded as equal, but they do give results with systematic differences. One task of the European project "EMRP JRP SIB 56 SoundPwr" has been to develop and investigate traceable and consistent methods for sound power measurements in essentially diffuse or free fields. By using a calibrated reference sound source as a traceability source, qualification procedures for setups for sound power determinations in different environments have been investigated. Uncertainty sources such as sound field sampling, directivity, frequency content and impedance of the device under test have been analysed. The results are presented in the contribution. © 2016, German Acoustical Society (DEGA). All rights reserved.
Place, publisher, year, edition, pages
2016. p. 6783-6792
Keywords [en]
Sound power, Traceability, Acoustic fields, Acoustic variables control, Acoustics, Uncertainty analysis, Device under test, European project, Frequency contents, Primary standards, Sound power determination, Uncertainty sources, Acoustic noise
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27614Scopus ID: 2-s2.0-84994666739OAI: oai:DiVA.org:ri-27614DiVA, id: diva2:1059675
Conference
45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016, 21 August 2016 through 24 August 2016
Note
References: (2010) ISO 3741 Acoustics - Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure - Precision Methods for Reverberation Test Rooms; (2010) ISO 3744 Acoustics - Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure - Engineering Methods for An Essentially Free Field over A Reflecting Plane; (2012) ISO 3745 Acoustics - Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure - Precision Methods for Anechoic Rooms and Hemi-anechoic Rooms; (2010) ISO 3746 Acoustics - Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure - Survey Method Using An Enveloping Measurement Surface over A Reflecting Plane; (1993) ISO 9614-1 Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Intensity - Part 1: Measurement at Discrete Points; (1996) ISO 9614-2 Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Intensity - Part 2: Measurement by Scanning; (1993) IEC 61043 Electroacoustics - Instruments for the Measurement of Sound Intensity - Measurements with Pairs of Pressure Sensing Microphones; Kirbas, C., Andersson, H., Guglielmone, C., Wittstock, V., Primary Sound Power Sources for the Realisation of the Unit Watt in Airborne Sound (2016) Internoise, , Hamburg, August; Brezas, S., Cellard, P., Andersson, H., Guglielmone, C., Kirbas, C., Dissemination of the unit Watt in airborne sound: Aerodynamic reference sound sources as transfer standards (2016) Internoise, , Hamburg, August; Bietz, H., Wittstock, V., Brezas, S., Investigations on the suitability of an electroacoustic sound source as secondary sound power standard (2016) Internoise, , Hamburg, August; Cellard, P., Andersson, H., Brezas, S., Wittstock, V., Automatic sound field sampling mechanisms to disseminate the unit watt in airborne sound Internoise, , Hamburg, August 2016
2016-12-222016-12-212017-09-18Bibliographically approved