This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Automotive Technical Center Quiet Room Improvement Study - Part I
Technical Paper
2015-01-2348
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper presents the results of a study to reduce the background noise level within a large Quiet Room located adjacent to other laboratory testing environments and below a mechanical mezzanine which houses an extensive array of mechanical and electrical equipment including banks of low-temperature chiller compressors, air handling units, and electrical switchgear that serves the entire building complex. This equipment was installed atop the concrete mezzanine floor deck without provisions for isolating vibration. As a result, structure-borne noise from that equipment travels through the floor, radiates from the underside of the floor deck, and intrudes into the Quiet Room below. This causes the background noise level within the Quiet Room to be too high for conducting low sound level measurements and studies on vehicles brought into the Quiet Room.
Conclusions of the study are that provisions originally intended to isolate the Quiet Room from the mezzanine floor deck were both insufficient and poorly installed, resulting in excessive noise transmitted into the Quiet Room. Recommended corrective measures include enhancement of the Quiet Room ceiling to improve the sound transmission loss performance of that assembly, and changes made to the mezzanine floor deck to isolate structure-borne noise. This work is being installed in phases and completion of the initial phase has shown very promising results.
Authors
Citation
Kolano, R., "An Automotive Technical Center Quiet Room Improvement Study - Part I," SAE Technical Paper 2015-01-2348, 2015, https://doi.org/10.4271/2015-01-2348.Also In
References
- International Standard Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms ISO 3745 second December 2003
- Duda , John Basic Design Considerations for Anechoic Chambers Noise Control Engineering 9 2 September 1977 10.3397/1.2832070
- Mason Industries, Hauppauge, NY
- Noise criteria as defined by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) in the ASHRAE Handbook
- American Society for Testing and Materials ASTM E 336-10 Standard Test Method for Measurement of Airborne Sound Insulation in Buildings
- Wentzel , R. and Saha , P. Empirically Predicting the Sound Transmission Loss of Double-Wall Sound Barrier Assemblies SAE Technical Paper 951268 1995 10.4271/951268
- Handbook of Acoustical Measurements and Noise Control 3 rd 31.10 Cyril M. Harris, McGraw Hill 0-07-026868-1 1991
- Ibid, page 27.4
- Noise Control in Buildings: A Practical Guide for Architects and Engineers Cyril M. Harris, McGraw Hill 0-07-028887-8 1994