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Test Method for Measuring Thickness of Resilient Insulating Paddings

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1355_201708
  • Current
Published 2017-08-14 by SAE International in United States
This SAE Recommended Practice describes a laboratory test procedure for measuring the thickness of various resilient insulating padding materials that are used in the automotive industry. Such padding materials may include synthetic or non-synthetic materials, fibrous or cellular materials, high loft or compressed materials, single layer homogeneous or multilayer products, low and high surface density products. Some of these samples may be deformable and elastic, high loft thermal and acoustical fibrous materials, as well. The test method described herein has been developed to establish a means of a uniform procedure for measuring the thickness of different types of samples not only for application to all ground vehicles, but also may be applicable to other situations or conditions. The test method is designed to measure the thickness of flat samples and not formed parts. This test method 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…
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Laboratory Measurement of the Acoustical Performance of Body Cavity Filler Materials

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J2846_201708
  • Current
Published 2017-08-11 by SAE International in United States
This SAE Recommended Practice describes a laboratory test procedure for measuring the acoustical performance of a system consisting of a body cavity filler material formed into a rectangular cross-section channel. Materials for this test may include both heat reactive and chemically reactive products, with or without a shelf to simulate a baffle in an application, or a combination of body cavity filler and aluminum foil to enhance the performance. These materials are commonly installed in transportation systems such as ground vehicles, and thus reduce the noise propagation through the rails, rockers, and pillar/posts. This document is intended to rank order the acoustical performance of materials for application on channels using general automotive steel, such that the effects of sealing of pinch welds in addition to the material could be easily evaluated. However, the channel is not an actual part (i.e., real life section) of the vehicle, and therefore results obtained from this study will have to be carefully interpreted considering limitations of section size/shape and full sealing (or not) of the section. The acoustical performance…
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Laboratory Measurement of the Airborne Sound Barrier Performance of Flat Materials and Assemblies

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1400_201707
  • Current
Published 2017-07-13 by SAE International in United States
This SAE Recommended Practice presents a test procedure for determining the airborne sound insulation performance of materials and composite layers of materials commonly found in mobility, industrial and commercial products under conditions of representative size and sound incidence so as to allow better correlation with in-use sound insulator performance. The frequency range of interest is typically 100 to 8000 Hz 1/3 octave-band center frequencies. This test method is designed for testing flat samples with uniform cross section, although in some applications the methodology can be extended to evaluate formed parts, pass-throughs, or other assemblies to determine their acoustical properties. For non-flat parts or assemblies where transmitted sound varies strongly across the test sample surface, a more appropriate methodology would be ASTM E90 (with a reverberant receiving chamber) or ASTM E2249 (intensity method with an anechoic or hemi-anechoic receiving chamber).
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Acoustical and Thermal Materials Test Procedure

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1324_201608
  • Current
Published 2016-08-02 by SAE International in United States
This SAE Recommended Practice provides test methods for determining the characteristics of acoustical and thermal materials. Where applicable, methods of test developed by SAE and ASTM have been referenced.

Standard Formats for Presenting Acoustical Data

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J2629_201508
  • Current
Published 2015-08-11 by SAE International in United States
SAE developed this document and associated spreadsheets at the request of automobile manufacturers to help compare products from multiple suppliers using standard data presentation formats. This document includes several preferred formats for presenting acoustical data on materials, components, systems, or vehicles. These formats cover the range of acoustical tests commonly conducted in the automotive industry. These tests follow SAE and ASTM test practices as well as vehicle specific test methods. For each test, the details of samples and test conditions can be entered into an applicable electronic spreadsheet together with the acoustical results data. These data are then linked to standard graphical display(s) for each test. All manufacturers and suppliers in this industry are encouraged to present data and results in these formats. Although this practice was developed specifically for use in the automotive industry, the formats may be usable in other industries and applications as well.
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Laboratory Measurement of Random Incidence Sound Absorption Tests Using a Small Reverberation Room

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J2883_201504
  • Current
Published 2015-04-30 by SAE International in United States
This SAE Recommended Practice describes a laboratory test procedure for measuring the random incidence sound absorption performance of a material or a part in a small size reverberation room by measuring decay rates. The absorption performance may include sound absorption coefficient of the test sample and or the amount of energy absorbed by the test sample. Materials for absorption treatments may include homogeneous materials, nonhomogeneous materials, or a combination of homogeneous, nonhomogeneous, and/or inelastic impervious materials. These materials are commonly installed in the mobility products and in the transportation systems such as ground vehicles, marine products, aircraft, and commercial industry (in industrial and consumer products) to reduce reverberant sound build-up and thus reduce the noise level in the environment by minimizing reflections off of hard surfaces. The test method described herein was developed also to describe a way to measure the absorption performance of a part or a sound package system that will relate to an application. It can be used to rank order materials for application on panels using general automotive steel but also…
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Vibration Damping Materials and Underbody Coatings

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J671_201406
  • Current
Published 2014-06-06 by SAE International in United States
The materials classified under this specification are: a Mastic vibration damping materials used to reduce the sound emanating from metal panels. b Mastic underbody coatings used to give protection and some vibration damping to motor vehicle underbodies, fenders, and other parts.
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Hot Plate Method for Evaluating Heat Resistance and Thermal Insulation Properties of Materials

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1361_201311
  • Current
Published 2013-11-20 by SAE International in United States
This test method is applicable for rating various materials, such as automotive trim materials and insulation composites, for their ability to resist heat transfer, heat degradation, odor, smoking, and exothermic reaction under prescribed temperature.
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Compression and Recovery of Insulation Paddings

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1352_201310
  • Current
Published 2013-10-29 by SAE International in United States
This test method is applicable for determining the relative compression and recovery of fibrous insulation padding materials.
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Laboratory Measurement of the Composite Vibration Damping Properties of Materials on a Supporting Steel Bar

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1637_201306
  • Current
Published 2013-06-18 by SAE International in United States
This SAE Recommended Practice describes a laboratory test procedure for measuring the vibration damping performance of a system consisting of a damping material bonded to a vibrating cantilevered steel bar. The bar is often called the Oberst bar (named after Dr. H. Oberst) and the test method is often called the Oberst Bar Test Method. Materials for damping treatments may include homogeneous materials, nonhomogeneous materials, or a combination of homogeneous, nonhomogeneous, and/or inelastic (such as aluminum foil) materials. These materials are commonly installed in transportation systems such as ground vehicles, marine products, and aircraft to reduce vibration at resonance, and thus reduce the noise radiation from the vibrating surface. The test method described herein was developed to rank order materials for application on panels using general automotive steel but also may be applicable to other situations or conditions. Damping performance for most materials and systems varies as a function of both frequency and temperature. Accordingly, this test procedure includes provisions for measuring damping over a range of frequencies and temperatures found applicable to many transportation…
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