Tag Archives: SAE

Industry Associations

Students and individuals looking for general information pertaining to industry are encouraged to keep in mind that DPS Technical, Inc. is a professional consulting and services company.  Our available time for conversation is very limited, and we typically will provide educational information by directly participating in educational activities at industry functions, or as a guest lecturer at an educational facility or event.

We regularly participate with the media in issues related to education and public information.

People who wish to contact us for education should keep in mind that fees for services are required when consulting services are provided.

We have posted educational information and several resources for people needing educational assistance.  The following information of industry associations, that may have technical research papers, publication libraries, or contacts available to aid students in finding the information that may be useful for research.

We are driven to provide the highest level of services, and to respect our client’s sensitive and confidential information.  Ladies & Gentlemen, as we address and overcome the obstacles of the present, we set the foundation of the future.

DPS Technical, Inc. is proud to be a committed organization and we recognize the lasting importance of international standards and the code of professional practices.  We urge other organizations to participate in the development and maintaining of internationally recognized procedures.

Contact Us

Chris Real
(909) 981-5228

E-Mail: Chris.Real@DPSTechnical.com

ASTM: American Society for Testing & Materials 100 Barr Harbor Dr., West Conshohocken, PA 19428-2959  (610) 832.9686
ANSI: American National Standards Institute 11 West 42nd. Street, New York, NY 10036  (212) 642.4900
ASME: American Society of Mechanical Engineers 345 East 47th. Street, New York, NY 10017-2392  (212) 705.8500
SAE: Society of Automotive Engineers, International 400 Commonwealth Drive, Warrendale, PA 15096-0001  (412) 776.4841
STLE: Society of Tribologists & Lubrication Engineers 840 Busse Highway, Park Ridge, IL 60068-2376  (847) 825.5536
APC: The Association of Professional Consultants Orange County, CA

Development of the J2835 On-Highway Motorcycle Sound Test Procedure

motorcycle-industry-council-logo1The MIC, MIC consultant Tom Austin (Sierra Research), MIC member Chris Real (DPS Technical, Inc.), and SAE Motorcycle Technical Steering Committee Chairman John Lenkeit (Dynamic Research Inc.) co-authored a paper on the development of the SAE J2825 on-highway stationary sound test procedure. The SAE published the paper, which was presented at the 2011 SAE Noise and Vibration Conference in Grand Rapids, Michigan on May 17th. The 14-page paper details the field testing, data analysis, evaluation of test site conditions, validation testing and even field testing.

In response to a growing need for a practical and technically valid method for measuring exhaust sound pressure levels (SPL) of on-highway motorcycles, the SAE Motorcycle Technical Steering Committee has developed Surface Vehicle Recommended Practice J28251, “Measurement of Exhaust Sound Pressure Levels of Stationary On-Highway Motorcycles,” which includes a new stationary sound test procedure and recommendations for limit values. Key goals of the development process included: minimal equipment requirements, ease of implementation by non-technical personnel, and consistency with the federal EPA requirements; in particular, vehicles compliant with the EPA requirements should not fail when assessed using J2825. Development of the recommended practice involved a comprehensive field study of 25 motorcycles and 76 different exhaust systems, ranging from relatively quiet OEM systems to unbaffled, aftermarket exhaust systems. For the various motorcycle/exhaust system configurations, SPL measurements were made using the EPA pass-by procedure and several different stationary measurement methods.