Project: Realisation, dissemination and application of the unit watt in airborne sound

Sound power is the total amount of sound radiated from a source such as a speaker and is often used to describe the acoustic output of technical products. This definition makes it independent of the environment and of the distance from a source but, in reality, sound power can only be determined from other measurements such as sound pressure at a certain position. This often results in different procedures to determine the sound power of a particular source producing different results, which leads to uncertainties up to the level of several decibels. This makes it impossible to compare the defined legal requirements for noise protection with measurement results in the field. This project will establish traceable measurements of sound power and develop a primary standard to realise the unit watt in airborne sound, with a target uncertainty of 0.5 decibels. It will also develop primary sound power sources, from which the unit watt can be disseminated to users.

Acronym	SIB56 SoundPwr (Reference Number: SIB56)
Duration	01/06/2013 - 31/05/2016
Project Topic	Metrology
Project Results (after finalisation)	See Website
Website	visit project website
Network	EMRP
Call	EMRP Call 2012 - Industry, SI Broader Scope and Open Excellence

Project partner

Number	Name	Role	Country
1	Physikalisch-Technische Bundesanstalt	Coordinator	Germany
2	Istituto Nazionale di Ricerca Metrologica	Partner	Italy
3	Laboratoire national de métrologie et d'essais	Partner	France
4	SP Sveriges Tekniska Forskningsinstitut AB	Partner	Sweden
5	Turkiye Bilimsel ve Teknolojik Arastirma Kurumu	Partner	Türkiye
6	Politecnico di Torino		Italy