ASTM E1123-86(2009)
(Practice)Standard Practices for Mounting Test Specimens for Sound Transmission Loss Testing of Naval and Marine Ship Bulkhead Treatment Materials
Standard Practices for Mounting Test Specimens for Sound Transmission Loss Testing of Naval and Marine Ship Bulkhead Treatment Materials
SIGNIFICANCE AND USE
The sound transmission loss provided by a material that covers a flat surface depends not only on the physical properties of the material but also on the type of structure to which it is mounted and the mounting method used.
Naval and marine architects and design engineers require specific transmission loss characteristics of acoustical treatment materials as they would exhibit installed on a ship's structure. The mounting structure and procedures specified in these practices are intended to simulate such a shipboard environment.
Test reports may refer to this mounting by Practices E 1123 instead of providing a detailed description of the mounting used.
SCOPE
1.1 These practices describe test specimen mountings to be used for naval and marine ship applications during sound transmission loss tests performed in accordance with Test Method E 90.
1.2 The structure specified in these practices is intended for mounting of single-layer treatments or composite treatments consisting of various materials and configurations. Acoustical treatment materials may be combinations of acoustical absorbent materials, limp mass septums, and insulation materials.
1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: E1123 − 86(Reapproved 2009)
Standard Practices for
Mounting Test Specimens for Sound Transmission Loss
Testing of Naval and Marine Ship Bulkhead Treatment
Materials
This standard is issued under the fixed designation E1123; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 Naval and marine architects and design engineers re-
quire specific transmission loss characteristics of acoustical
1.1 These practices describe test specimen mountings to be
treatment materials as they would exhibit installed on a ship’s
used for naval and marine ship applications during sound
structure. The mounting structure and procedures specified in
transmission loss tests performed in accordance with Test
these practices are intended to simulate such a shipboard
Method E90.
environment.
1.2 The structure specified in these practices is intended for
3.3 Test reports may refer to this mounting by Practices
mounting of single-layer treatments or composite treatments
E1123 instead of providing a detailed description of the
consisting of various materials and configurations. Acoustical
mounting used.
treatment materials may be combinations of acoustical absor-
bent materials, limp mass septums, and insulation materials.
4. Mounting Structure and Methods
1.3 The values stated in SI units are to be regarded as the
4.1 The mounting structure consists of a fabricated alumi-
standard. The values in parentheses are for information only.
num bulkhead.This bulkhead is designed to fit within a 2.44-m
1.4 This standard does not purport to address all of the
(8-ft) opening in the filler walls between the reverberation
safety concerns, if any, associated with its use. It is the
rooms of a test facility. Test result measurements due to the
responsibility of the user of this standard to establish appro-
effects of the filler walls may be accounted for as specified in
priate safety and health practices and determine the applica-
Test Method E90. A larger mounting structure may be used if
bility of regulatory limitations prior to use.
it can be demonstrated that this structure yields results com-
parable to the 2.44 by 2.44-m (8 by 8-ft) mounting structure.
2. Referenced Documents
4.1.1 The bulkhead is fabricated in two sections, 1.22 by
2.1 ASTM Standards:
2.44 m (4 by 8 ft) and is fastened together by a 10.2 by 10.2 by
C634 Terminology Relating to Building and Environmental
10.2-cm (4 by 4 by 4-in.) aluminum I-beam.
Acoustics
4.1.2 The coupling is accomplished by using 8-mm ( ⁄16-in.)
E90 Test Method for Laboratory Measurement of Airborne
SAE grade B steel stove bolts, torqued to 3.33 m/kg (25 ft/lb).
Sound Transmission Loss of Building Partitions and
4.1.3 The 6.4-mm ( ⁄4-in.) sheet aluminum panels, 1.22 by
Elements
2.44 m (4 by 8 ft), are supported with 10.2 by 10.2 cm (4 by
4 in.), 2.976-kg per linear metre (2-lb per linear ft) tee beams.
3. Significance and Use 1
4.1.3.1 The tee beams are welded to the 6.4-mm ( ⁄4-in.)
aluminum sheets with welds on either side of the center
3.1 The sound transmission loss provided by a material that
member of the tee at 53.3-cm (21-in.) intervals.
covers a flat surface depends not only on the physical proper-
4.1.3.2 Weld areas should be approximately 7.6 cm (3 in.)
ties of the material but also on the type of structure to which it
long. Welding in excess of these intervals may cause severe
is mounted and the mounting method used.
warpage of the bulkhead. The tee beams are positioned on the
aluminum sheets to obtain a distance of 61 cm (2 ft) between
These practices are under the jurisdiction of ASTM Committee E33 on
tee beam centers with the I-beam serving as the bulkhead
Building and EnvironmentalAcoustics and are the direct responsibility of Subcom-
center support.
mittee E33.03 on Sound Transmission.
4.1.4 Fig.1illustratestheconstructiondetails.Thebulkhead
Current edition approved April 1, 2009. Published August 2009. Originally
approved in 1986. Last previous edition approved in 1998 as E1123 – 86 (2003).
shall be installed with the smooth side facing the acoustical
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
source room and fastened in the filler wall opening by any
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
means which will provide a secure, rigid structure. Tapered
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. wooden wedges driven between the filler wall at each tee beam
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E1123 − 86 (2009)
NOTE 1—6.4-mm sheet plate.
NOTE 2—10.2 by 10.2-cm tees, 2.976 kg per linear metre.
NOTE 3—Two 1.22 by 2.44-m bulkhead sections joined with I-beam using 8-mm bolts.
NOTE 4—Bulkhead sections delivered unassembled.
FIG. 1 Aluminum Bulkhead Details
support will provide the necessary rigidity. Acoustical sealant 4.2.4 A typical stud pin pattern is shown in Fig. 2.
shall be applied around the bulkhead edges, between the filler
4.3 Acoustical treatment material shall be secured on the
wall and the bulkhead and the I-beam panel connector to
stud p
...
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