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Problems With Using In-Vehicle Acoustic Absorption Measurements to Develop Interior Trim Parts Based on Laboratory Measurements
Technical Paper
2001-01-1622
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Setting accurate acoustic performance targets for trim components early in a vehicle program is essential to develop the vehicle on-time, with appropriate acoustical performance, at lowest weight, and at lowest cost. The laboratory measurement of acoustic absorption (ASTM C 423 and ISO 354) of flat stock trim parts is used to obtain these targets or the specific trim part is measured in a vehicle to obtain the acoustic absorption. However, the in situ measurement often does not agree with the laboratory measurement even if the variations between formed parts and flat stock materials are accounted for. A statistical energy analysis model is used to illustrate the problems with in situ absorption measurements. An approach to correct the in situ test method to obtain an approximation of the laboratory result is discussed.
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Citation
Unglenieks, R. and Eppard, P., "Problems With Using In-Vehicle Acoustic Absorption Measurements to Develop Interior Trim Parts Based on Laboratory Measurements," SAE Technical Paper 2001-01-1622, 2001, https://doi.org/10.4271/2001-01-1622.Also In
References
- Qian, Y. Vanbuskirk, J. “Sound Absorption and Their Use in Automotive Interior Sound Control” SAE Noise and Vibration Conference Proceedings, 951244 1995
- Sorenson, S. “Steady State Reverberation Time Measurement” SAE Noise and Vibration Conference Proceedings, 972032 1997