A power transmissibility method for assessing the performance of vibration isolation of building services equipment

Cheuk Ming Mak, Su Jianxin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


Force transmissibility is commonly adopted in building services engineering to assess the performance of vibration isolation. However, it neglects the effect of floor mobility on structure-borne sound power transmitted from a vibratory machine to the floor/roof and the interactions among several contact points between the vibratory machine and the floor/roof. The problem that motivated this study is the occasional occurrence of unsatisfactory performance of vibration isolators observed in building services engineering. This problem may be due to the over-simplification of the vibratory problem in the usual definition of the un-damped force transmissibility or isolation efficiency commonly used in engineering practice. In this paper, use of a "power transmissibility", which includes the effect of floor mobility and the interaction of all dynamic forces transmitted to the floor through the vibration isolators, is proposed.
Original languageEnglish
Pages (from-to)1281-1299
Number of pages19
JournalApplied Acoustics
Issue number12
Publication statusPublished - 1 Jan 2002

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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