Selective Intensimetry for the Measurement of Sound Power Radiation from Building Elements
Abstract
Available from UMI in association with The British Library. A computer-based measurement system has been developed by means of which the sound intensity from a selected source, in the presence of incoherent background noise, can be determined, and the system has been used to investigate the feasibility of such selective conditioning techniques in the estimation of radiated power in the room-to-room transmission loss problem. A substantial degree of selective conditioning against background noise has been shown to be possible when the building element under investigation is subject to multi-sine (but not random) excitation. The effects of background noise in the receiving room on measurement accuracy when standard, non-selective, intensity measurement is used to infer radiated power, has been quantified, and results are presented to illustrate the way in which selective conditioning can reduce these effects. Some preliminary information is given to demonstrate the possible use of selective conditioning when background noise is present in the source room. Whilst selective conditioning might not lend itself to precision measurement, it does appear to encourage further exploration for diagnostic purposes in specific problems that are intractable to non-selective approaches.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1991
- Bibcode:
- 1991PhDT.......243L
- Keywords:
-
- SELECTIVE CONDITIONING;
- Physics: Acoustics