Page 30 - ALLOY Partitioning Systems

(Sound Transmission Class)

Introduction.

ALLOY
tested for sound transmission performance.

Test Method Measurement Results
Specimen were installed between two reverberation The Transmission Loss is determined by the sound
chambers The space and time averaged sound levels on both sides of the sample and analyzing
pressure levels in the two rooms were determined, the data in accordance with ISO 10534-2 (1998).
as well as the sound absorption in the receiving The airborne sound transmission loss (TL) of the
room. The sound pressure levels in the two rooms, test sample for each individual 1/3 octave band
the sound absorption in the receiving room and center frequency and the STC rating number is
the area of the specimen was used to calculate the shown in the next page.
transmission loss value.
The graphical representation of the values in
The air temperature and the relative air humidity the table is also shown.
in both the source and receiving room were
measured. BS EN ISO 717-1:1997, “Acoustics The calculated weight noise reduction as
– Rating of sound insulation in buildings and of described in ISO 717-1 is 45 dB.
building elements” was used in the interpretation
and calculation of the results.

DSG The sound transmission-loss measurements of the double glazing panel

Stimulus Response

30 ALLOY