A Reduced-Noise Gas Flow Design Guide provides a useful reference that enables Glenn Research Center engineers to design quieter systems, facilities and equipment in accordance with hearing conservation and community noise goals. The Guide comprises a written manual and a collection of powerful computerized design tools that may be used to estimate noise emission for a variety of equipment noise sources as well as the effects of piping and noise-attenuating elements such as silencers and pipe lagging. Although the Guide was developed with GRC equipment and systems in mind, it provides a model for solutions to problems that occur in general industrial environments.

Please note that this program is focused solely on hearing loss prevention and does not address other important noise exposure issues such as speech intelligibility and work environment comfort that are often associated with moderate- or lower-level noise sources. A comprehensive approach to noise exposure management will consider these lower and moderate level noise issues as well as hearing loss prevention when developing requirements for any siting, procurement, and design projects.

The Reduced-Noise Gas Flow Design Guide was developed for the NASA Glenn Research Center under contract by  Nelson Acoustics.

For more information the "Quiet By Design" program at NASA Glenn Research Center, please see the publications below:

Nelson, David A. and Cooper, Beth A. "A Reduced-Noise Gas Flow Design Guide" for NASA Glenn Research Center." Proceedings of Inter-Noise 1999. Fort Lauderdale, FL. 06-08 Dec. 1999. (.pdf file)

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