Classification for Rating Sound Insulation
|Publication Date:||1 September 2010|
This classification covers methods of calculating singlenumber acoustical ratings for laboratory and field measurements of sound attenuation obtained in one-third octave bands.
The name given to the single-number rating is assigned by the test method that invokes this classification.
Test methods that invoke this classification include:
Test Method E90-The single-number rating is called sound transmission class (STC).
Test Method E336-Single-number ratings are field sound transmission class (FSTC), noise isolation class (NIC), and normalized noise isolation class (NNIC).
Test Method E596-The single-number rating is called noise isolation class (NIC).
Test Method E1414-The single-number rating is called ceiling attenuation class (CAC).
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.