SAE J2846-2017
SAE J 2846-2010

Laboratory Measurement of the Acoustical Performance of Body Cavity Filler Materials

SAE J2846-2017 发布历史

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 is expressed in terms of insertion loss (IL) which is described in Section 3 Test Method. The test procedure described here is based on the method described in SAE J1400. However@ this document differs from the SAE J1400 method in that the J1400 measures sound transmission loss@ and this document measures IL of body cavity materials in a cavity. This document covers the useful frequency range of interest in 1/3 octave band center frequencies. The lower limit of the actual frequency range is limited by the size of the channel and/or the volume of the reverberation room. Two rectangular cross-section channels are cited in this standard. These are 75 mm x 75 mm and 150 mm x 150 mm in cross-section and provide valid data at and above 800 Hz and 400 Hz 1/3 octave band frequencies@ respectively@ provided the reverberation room can generate diffuse sound field at those frequencies.

SAE J2846-2017由SAE - SAE International 发布于 2017-01-01，并于 2017-01-01 实施。

SAE J2846-2017的历代版本如下：

• 2010年05月01日 SAE J2846-2010 SAE J 2846-2010
• 2017年01月01日 SAE J2846-2017 SAE J 2846-2010

标准号

SAE J2846-2017

发布日期

2017年01月01日

实施日期

2017年01月01日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

SAE - SAE International

适用范围

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 is expressed in terms of insertion loss (IL) which is described in Section 3 Test Method. The test procedure described here is based on the method described in SAE J1400. However@ this document differs from the SAE J1400 method in that the J1400 measures sound transmission loss@ and this document measures IL of body cavity materials in a cavity. This document covers the useful frequency range of interest in 1/3 octave band center frequencies. The lower limit of the actual frequency range is limited by the size of the channel and/or the volume of the reverberation room. Two rectangular cross-section channels are cited in this standard. These are 75 mm x 75 mm and 150 mm x 150 mm in cross-section and provide valid data at and above 800 Hz and 400 Hz 1/3 octave band frequencies@ respectively@ provided the reverberation room can generate diffuse sound field at those frequencies.