On the Characteristic Power of Structure-Borne Sound Sources

Reception plate method for characterisation of structure-borne sound sources in buildings: Installed power and sound pressure from laboratory data

“…Y infinite is frequency invariant and real-valued and therefore is the same as the desired quantity Re(Y infinite ). The term 'characteristic' will not be used in this paper, in order to avoid confusion concerning the separate term 'characteristic power', proposed by Moorhouse [9]. The spatial average of the point mobility, for forces perpendicular to the reception plate, represents the mean receiver mobility.…”

Vibration activity and mobility of structure-borne sound sources by a reception plate method

“…͑3͒ indicates that the phase difference between source and receiver mobilities, contained in ͉Y S ⌺ + Y R ⌺ ͉, will be important, particularly when the mobilities are of the same magnitude. 3,5 However, this problem can be partly circumvented by assuming that the installation source-receiver mobility condition is in one of only three possible states.…”

“…A detailed discussion of the possible forms of matching is given by Moorhouse. 3 In a recent study, the use of a mirror condition was proposed, where the real parts and imaginary parts are, respectively, equal. 8 None of the three assumed possible source-receiver conditions requires source data in complex form.…”

“…This is not the case for structure-borne sources. Reviews by Bodén, 1 Petersson and Gibbs, 2 and Moorhouse 3 have identified the need for a source characterization which will yield data and methods appropriate for transmission prediction. ten Wolde and Gadefelt highlight the difficulties in developing test methods which are simple but at the same time generate data appropriate for prediction.…”

Reception plate method for characterisation of structure-borne sound sources in buildings: Assumptions and application

“…Ohlrich obtained the structure-borne sound power by multiplication of the equivalent forces by the associated real part of the point mobilities [12,13]. There is a general consensus that structure-borne sound sources should be characterised in terms of their sound power [10,14]. This is equivalent to the treatment of airborne sound sources by reference to the airborne sound power.…”