1. Scope

1.1 This classification provides methods of calculating single-number acoustical ratings for laboratory and field measurements of sound transmission obtained in one-third octave bands. The method may be applied to laboratory or field measurements of the sound transmission loss of a partition in which case the single-number ratings are called sound transmission class (STC) or field sound transmission class (FSTC), respectively. The method may also be applied to laboratory and field measurements of the sound isolation between two spaces, in which case the single-number ratings are called the noise isolation class (NIC) or normalized noise isolation class (NNIC).

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C634 Terminology Relating to Building and Environmental Acoustics

E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements

E336 Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings

E596 Test Method for Laboratory Measurement of Noise Reduction of Sound-Isolating Enclosures

E1332 Classification for Rating Outdoor-Indoor Sound Attenuation

E1414 Test Method for Airborne Sound Attenuation Between Rooms Sharing a Common Ceiling Plenum

ISO Standard

Keywords

architectural acoustics; building design; ceiling attenuation class (CAC); field sound transmission class (FSTC); noise isolation class (NIC); normalized noise isolation class (NNIC); partitions (buildings); sound insulation rating; sound transmission class (STC); Acoustical materials/applications; Architectural acoustics; Chemical-resistant mortars; Classification (standards)--acoustic materials; Field sound transmission class (FSTC); Field testing--sound transmission; Noise isolation class (NIC); Normalized noise isolation class (NNIC); One-third octave band sound pressure levels; Partitions; Sound absorbing/insulating materials/applications; Sound transmission--building materials/applications; Sound transmission class (STC);

ICS Code

ICS Number Code 91.120.20 (Acoustics in buildings. Sound insulation)

DOI: 10.1520/E0413-87R99

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