The use of numerical simulation to investigate measurement methods of the sound reduction index in the very low frequency range
Sound reduction index measurements of building elements in the very low frequency range is being studied by a European project. The aim of this project is to promote measurement reproducibility between laboratories. Results to date are reported here. During the first phase, a numerical approach has been carried out to study both problems related to the acoustic measurements, and laboratory arrangement. For the measurement part, it appeared that in the source room the use of the averaged value of sound pressure level (SPL) over the test object was limiting the spread of results. In the receiving room intensity measurement is preferable. Concerning the laboratory arrangement, a better reproducibility may be achieved when the test object radiates in a free field or in a duct, compared with the classical reverberant field. The use of the simulation appeared to be well suited for measuring technique investigations because it allows the avoidance of many heavy experiments especially in the field of inter-laboratory comparison.
Bibliographic Reference: Paper presented: Euro-Noise 95, Lyon (FR), March 21-24, 1995
Availability: Available from (1) as Paper EN 39615 ORA
Record Number: 199512098 / Last updated on: 1996-01-15
Original language: en,fr
Available languages: en,fr