Estimates of mobility for prediction of structure-borne sound transmission in buildings

Gibbs, BM ORCID: 0000-0002-5146-8215 and Mayr, AR (2012) Estimates of mobility for prediction of structure-borne sound transmission in buildings. In: 19th International Congress on Sound and Vibration, 2012-7-9 - 2012-7-12, 19th International Congress on Sound and Vibrationilnius.

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Abstract

This paper aims to provide a practical approach to the prediction of structure-borne sound power of mechanical installations in buildings. For structure-borne power, two source quantities, activity and mobility, are required, in combination with one receiver quantity, the receiver mobility. The source activity, in the form of free velocity or blocked force, is usually measured. For source mobility and receiver mobility, estimates, based on simple expressions, can provide a useful starting point. Also, machine bases may be categorised as: compact, plate-like, flanged or framed. Receiver structures, floors and walls, may be categorised as: plate-like, ribbed plate or framed plate. The estimates of source mobility are based on the rigid body value, the characteristic plate mobility and the fundamental plate frequency. For ribbed and framed plate structures, the mobility will vary with location, but again simple estimates of mobility, based on characteristic values and distance from the ribs, are possible.

Item Type:	Conference or Workshop Item (Unspecified)
Depositing User:	Symplectic Admin
Date Deposited:	02 Aug 2017 15:00
Last Modified:	19 Jan 2023 06:58
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3008792