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 limitations prior to use. This test method provides a different thickness measuring device than what has been mentioned in SAE J1355 Apr87.
Rationale
This method has been significantly modified from the earlier version, including the apparatus, sample size, conditioning, and procedure. This method provides a way to measure the thickness of a resilient insulating padding correctly as the thickness affects the sound absorption performance and the thickness of the padding needs to be reported for which the absorption data is provided. The thickness of the resilient insulating padding may need to be reported for applications other than absorption data also.
The Acoustical Materials Committee is dedicated to developing, coordinating, reviewing, approving, maintaining and revising documents related to ground vehicle noise and vibration control materials through the participation of material suppliers, part suppliers, system integrators, consultants, test laboratories and ground vehicle manufacturers. Committee activities shall provide a forum for the cooperative interchange of ideas and experience of the participants, resulting in the publication of Standards, Recommended Practices and Information Reports that embody established ground vehicle industry practices and requirements to serve the suppliers and customers of ground vehicle materials. At its discretion, the committee shall also sponsor and support SAE International technical meetings such as conferences, workshops and symposia to further the exchange of information and ideas.
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Test Method for Measuring Thickness of Resilient Insulating Paddings
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Test Method for Measuring Thickness of Resilient Insulating Paddings
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