Web-Based Product Noise Declarations for the Information Technology Industry

A standard was published in 1985 that was to have far-reaching consequences: ISO 7574: Statistical Methods for Determining and Verifying Stated Noise Emission Values of Machinery and Equipment. For the first time, consumers and other purchasers were able to get noise emission information for the products they buy just as they were able to get nutritional information on the food they eat, power usage information on the electrical appliances they use, or gas mileage information on the cars they drive. ISO 7574 was published in four parts and promulgated the benefits of declaring noise emission values while describing, in great detail, the statistical methods needed for determining and verifying the declared value. In an attempt to make the statistical requirements of ISO 7574 a bit more tractable for the manufacturers of machinery and equipment who would be doing the declaring, ISO 4871: Declaration and Verification of Noise Emission Values of Machinery and Equipment was drafted. It condensed the information in ISO 7574 and assigned a value to the so-called reference standard deviation. A procedure was specified for verifying the declared value based on a random sample of three machines. While it is true that in the two decades since its original publication, ISO 4871 has been referenced extensively in national and international standards, industry test codes, and European Directives, a large percentage, if not the majority, of noise-emitting products on the market today are still being bought and sold without any noise emission information being made available to the purchaser. In 1988, the Information Technology industry was the first industry to specialize the requirements of ISO 7574 and ISO 4871 to its own products, by drafting ISO 9296: Acoustics—Declared Noise Emission Values of Computer and Business Equipment. Based on the measurement test codes of the IT industry and the particular family of products common to the industry, a standard deviation of reproducibility and a reference standard deviation were defined and incorporated into the standard. The IT industry has had good success with its ISO 9296 standard on at least two fronts: (1) there is virtually unanimous support for it within the IT industry; and (2) many standards, regulations, environmental labeling documents, and company specifications refer to its requirements and procedures for declaring and verifying product noise emission levels. Yet in terms of the availability and accessibility of noise declarations for IT products, ISO 9296 may not be as successful as originally envisioned. Despite this fact the authors feel that there is no reason the IT industry cannot again take the lead and be the first to fully embrace the worldwide web as the vehicle for providing acoustical noise declarations to consumers and prospective customers.


  • English

Media Info

  • Media Type: Audiotape
  • Features: Figures; References;
  • Pagination: pp 983-993
  • Monograph Title: Noise-Con 04. The 2004 National Conference on Noise Control Engineering

Subject/Index Terms

Filing Info

  • Accession Number: 01054370
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 26 2007 3:04PM