ASTM E413-87(1999)

Classification for Rating Sound Insulation

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).

General Information

• Status: Historical
• Publication Date: 09-Feb-1999
• ICS: 91.120.20 - Acoustics in building. Sound insulation
• Technical Committee: E33 - Building and Environmental Acoustics
• Drafting Committee: E33.03 - Sound Transmission

Relations

• Replaced By: ASTM E413-04 - Classification for Rating Sound Insulation
• Effective Date: 01-Apr-2004
• Referred By: ASTM E1704-95(2018) - Standard Guide for Specifying Acoustical Performance of Sound-Isolating Enclosures
• Effective Date: 10-Feb-1999
• Referred By: ASTM E336-23 - Standard Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings
• Effective Date: 10-Feb-1999
• Referred By: ASTM E596-22 - Standard Test Method for Laboratory Measurement of Noise Reduction of Sound-Isolating Enclosures
• Effective Date: 10-Feb-1999
• Referred By: ASTM E2249-19 - Standard Test Method for Laboratory Measurement of Airborne Transmission Loss of Building Partitions and Elements Using Sound Intensity
• Effective Date: 10-Feb-1999
• Referred By: ASTM C919-22 - Standard Practice for Use of Sealants in Acoustical Applications
• Effective Date: 10-Feb-1999
• Referred By: ASTM C1172-19 - Standard Specification for Laminated Architectural Flat Glass
• Effective Date: 10-Feb-1999
• Referred By: ASTM C634-22 - Standard Terminology Relating to Building and Environmental Acoustics
• Effective Date: 10-Feb-1999
• Referred By: ASTM E1264-23 - Standard Classification for Acoustical Ceiling Products
• Effective Date: 10-Feb-1999
• Referred By: ASTM E557-12(2020) - Standard Guide for Architectural Design and Installation Practices for Sound Isolation between Spaces Separated by Operable Partitions
• Effective Date: 10-Feb-1999
• Referred By: ASTM E2964-21 - Standard Test Method for Measurement of the Normalized Insertion Loss of Doors
• Effective Date: 10-Feb-1999
• Referred By: ASTM E1414/E1414M-21a - Standard Test Method for Airborne Sound Attenuation Between Rooms Sharing a Common Ceiling Plenum
• Effective Date: 10-Feb-1999
• Referred By: ASTM E90-09(2016) - Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
• Effective Date: 10-Feb-1999
• Referred By: ASTM E1332-22 - Standard Classification for Rating Outdoor-Indoor Sound Attenuation
• Effective Date: 10-Feb-1999
• Referred By: ASTM E1425-14(2023) - Standard Practice for Determining the Acoustical Performance of Windows, Doors, Skylight, and Glazed Wall Systems
• Effective Date: 10-Feb-1999

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: E 413 – 87 (Reapproved 1999)
Classification for
Rating Sound Insulation
This standard is issued under the fixed designation E 413; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (ϵ) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope quantities measured in accordance with Test Method
E 336E 336, to derive field sound transmission class (FSTC),
1.1 This classification provides methods of calculating
noise isolation class (NIC), and normalized noise isolation
single-number acoustical ratings for laboratory and field mea-
class (NNIC) and to (2) noise reductions measured in accor-
surements of sound transmission obtained in one-third octave
dance with Method E 596E 596 to derive noise isolation class.
bands. The method may be applied to laboratory or field
4.2 These single-number ratings correlate in a general way
measurements of the sound transmission loss of a partition in
with subjective impressions of sound transmission for speech,
which case the single-number ratings are called sound trans-
radio, television, and similar sources of noise in offices and
mission class (STC) or field sound transmission class (FSTC),
buildings. This classification method is not appropriate for
respectively.Themethodmayalsobeappliedtolaboratoryand
sound sources with spectra significantly different from those
field measurements of the sound isolation between two spaces,
sources listed above. Such sources include machinery, indus-
in which case the single-number ratings are called the noise
trial processes, bowling allies, power transformers, musical
isolation class (NIC) or normalized noise isolation class
instruments, many music systems and transportation noises
(NNIC).
such as motor vehicles, aircraft and trains. For these sources,
2. Referenced Documents
accurate assessment of sound transmission requires a detailed
analysis in frequency bands.
2.1 ASTM Standards:
4.3 The single-number ratings obtained can be used to
C 634 Terminology Relating to Environmental Acoustics
compare the potential sound insulation of partitions or floors
E90 Test Method for Laboratory Measurement ofAirborne
tested in laboratory conditions or the actual sound isolation
Sound Transmission Loss of Building Partitions
between different suites in buildings. The rating for a partition
E 336 Test Method for Measurement of Airborne Sound
built and tested in a building may be lower than that obtained
Insulation in Buildings
for a partition tested in a laboratory because of flanking
E 596 Test Method for Laboratory Measurement of the
transmission or construction errors.
Noise Reduction of Sound-Isolating Enclosures
2.2 ISO Standard
NOTE 1—A similar rating procedure, described in ISO 717, provides
ISO717 Rating of Sound Insulation for Dwellings
single figure sound insulation ratings with a frequency range that extends
from 100 to 3150 Hz and with no maximum deficiency specified at
3. Terminology
individual frequencies.
3.1 For definitions of terms used in this classification, see
5. Procedure
Terminology C 634C 634.
5.1 The reference contour is defined by the array of levels
4. Significance and Use
given in Table 1 and shown in Fig. 1.
4.1 The procedure may be applied to one-third octave band
sound transmission losses of test specimens measured in
TABLE 1 Reference Sound Insulation Contour for Calculation of
accordance with Test Method E 90E90 to derive sound trans-
Single-Number Ratings
mission class (STC). It can also be applied to (1) similar
NOTE 1—Reference sound insulation contour for calculation of single-
number ratings. This contour has a rating of zero. Other contours may be
derived by adding the same integer simultaneously to all values in the
This classification is under the jurisdiction of ASTM Committee E33 on
table.
EnvironmentalAcousticsandisthedirectresponsibilityofSubcommitteeE33.03on
Sound Transmission.
Frequency, Hz 125 160 200 250 315 400 500 630
Current edition approved Sept. 16, 1987. Approved October 1987. Originally
Level, dB −16 −13 −10 −7 −4 −1 0 1
e1
published as E 413 – 70 T. Last previous edition E 413 – 87 (1994) . Frequency, Hz 800 1000 1250 1600 2000 2500 3150 4000
Annual Book of ASTM Standards, Vol 04.06. Level, dB 2 3 4 4444 4
Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
E 413 – 87 (1999)
adjusting initially by trial and error, then making finer adjustments until
the criteria are satisfied.
6. Presentation of Results
6.1 It is recommended that the data be plotted to the scale
sizes recommended in Note 3, along with the shifted reference
contour (see Fig. 2). This type of presentation draws attention
FIG. 1 Reference Contour for Calculating Sound Transmission
Class and Other Ratings
5.2 Round the data to which the contour is to be fitted to the
nearest integer if this is not already specified in the measure-
ment standard.
5.3 Fit the reference contour to the data by increasing
simultaneously all the values in Table 1 in 1 dB increments
until some of the measured data are less than the shifted
reference contour.
FIG. 2 Ex
...