ASTM E1332-10a
Standard Classification for Rating Outdoor-Indoor Sound Attenuation
- Standard No.
- ASTM E1332-10a
- Release Date
- 2010
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM E1332-16
- Latest
- ASTM E1332-22
- Scope
This classification provides a single number rating for transmission loss or noise reduction data that have been measured or calculated. This rating is based on the difference between the overall A-weighted sound level of the sound spectrum given in Table 1 and the overall A-weighted sound level of the spectrum that results from arithmetically subtracting the transmission loss or noise reduction data from this spectrum. The spectrum shape is an average of three typical spectra from transportation sources (aircraft takeoff, freeway, and railroad passby). A study showed that this classification correlated well with the A-weighted and loudness reductions (see ISO 532) calculated for each of the typical spectra for the one-third octave band range of 50 to 5000 Hz. The calculated numeric value of the rating is based on the sound transmission loss or noise reduction values for a particular specimen and depends only on that data and the shape of the reference source spectrum used in the calculation. The values shown in Table 1 have an arbitrary reference level. Single-number ratings should always be used with caution. Specimens having the same rating can result in different indoor spectra depending on the variation of their transmission loss with frequency. Also, if the actual spectrum of the outdoor sound is different from that assumed in Table 1, the overall A-weighted outdoor-indoor noise reduction may be different from the OINIC.
This classification requires sound transmission loss (TL), apparent outdoor-indoor transmission lost (AOITL(θ)) , or outdoor-indoor noise reduction measurements (OILR(θ)) in one-third octave bands from 80 to 4000 Hz. Due to accuracy limitations given in Test Method E90 and Guide E966, measurements below the 100 Hz one-third octave band are not usually reported. Studies have shown that data in the 80 Hz one-third octave band are necessary to obtain acceptable correlations for transportation sound sources. For the purposes of this classification, measurements of sound transmission loss in the 80 Hz one-third octave band from qualified laboratories are deemed to be of acceptable accuracy.
Users of this classification should recognize that low frequency measurements of sound transmission loss may be affected by the test specimen size or the specimen edge restraints, or both, particularly for small modular specimens such as doors or windows. Consequently, the outdoor-indoor transmission class (OITC) may also be affected by these factors, resulting in some uncertainty of the field performance of assemblies bearing a rating number using this classification, but to what extent is unknown.
1.1 The purpose of this classification is to provide a method to calculate single-number ratings that can be used for assesing the isolation for the outdoor sound provided by a building or comparing building facade specimens including walls, doors, windows, and combinations thereof, including complete structures. These ratings are designed to correlate with subjective impressions of the ability of building elements to reduce the penetration of outdoor ground and air transportation noise. These ratings provide an evaluation and rank ordering of the performance of test specimens based on their effectiveness at controlling the sound of a specific outdoor sound spectrum called the reference source spectrum.
1.2 In addition to the calculation method, this classification defines some ratings not defined in other standards. Other standards may define additional ratings based on the method of this classification.
1.3 The rating does not necessarily relate to the perceived aesthetic ......
ASTM E1332-10a Referenced Document
- ASTM C634 Standard Terminology Relating to Building and Environmental Acoustics
- ASTM E413 Classification for Rating Sound Insulation
- ASTM E90 Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
- ASTM E966 Standard Guide for Field Measurements of Airborne Sound Insulation of Building Facades and Facade Elements
- ASTM E989 Standard Classification for Determination of Impact Insulation Class (IIC)
- ISO 532 Calculation method for acoustic loudness levels Technical Corrigendum 1
ASTM E1332-10a history
- 2022 ASTM E1332-22 Standard Classification for Rating Outdoor-Indoor Sound Attenuation
- 2016 ASTM E1332-16 Standard Classification for Rating Outdoor-Indoor Sound Attenuation
- 2010 ASTM E1332-10a Standard Classification for Rating Outdoor-Indoor Sound Attenuation
- 2010 ASTM E1332-10 Standard Classification for Determination of Outdoor-Indoor Transmission Class
- 1990 ASTM E1332-90(2003) Standard Classification for Determination of Outdoor-Indoor Transmission Class
- 1990 ASTM E1332-90(1998) Standard Classification for Determination of Outdoor-Indoor Transmission Class
