ANSI - American National Standards Institute
 Print this article  Previous Next 

Voluntary Standards Cover the Spectrum: From Audiometers to Gas-Fired Pool Heaters

New York, Aug 26, 2004

In an effort to communicate the vital role that standards play in daily life, ANSI Online will publish, on an ongoing basis, a series of snapshots of the diverse standards initiatives undertaken in the global and national standards arena, many of which are performed by ANSI members and ANSI-accredited standards developers. Two of the latest selections follow:

Hearing is not only a near-essential sense ability for communication and language, but the ability to hear or decipher noises also helps to keep people out of harm's way. Testing and determining levels of hearing sensitivity is a major element in ensuring the proper protection and maintenance of one’s hearing, and audiometers are special tools that help to accomplish this.

Simply put, audiometers are electronic instruments intended for the testing of human hearing, which can be gauged and recorded on a scale. These devices are used for diagnostic purposes and are critical for determining the power and sensitivity of hearing. ANSI S3.6: Specification for Audiometers provides specifications and tolerances for pure tone, speech, and masking signals and describes the minimum test capabilities of different types of audiometers. It also includes specifications and tolerances for audiometers and standard reference threshold levels for audiometric transducers such as supra-aural, circumaural, and insert earphones, bone vibrators, and loudspeakers. The audiometers covered in this specification are devices designed for use in determining the hearing threshold level of an individual in comparison with a chosen standard reference threshold level. ANSI S3.6 is developed by the Acoustical Society of America, an ANSI member and accredited standard developer.

Gas-Fired Pool Heaters
Although the summer is winding down and the weather will soon be cooling off, aquatic enthusiasts can continue to enjoy their pools and spas into the cool autumn months. This is possible because of several devices available that are used to heat pool water to warm, comfortable temperatures, even when there is a chill in the air. There are several types of pool heaters, including heat pumps, solar heating systems, and gas heaters. Gas heaters are energy efficient and allow users to consume only as much gas as they prefer, as it is thermostat controlled. Gas heaters have an on/off switch, pressure switch, gas valve and high limit switches in its safety circuitry.

ANSI Z21.56b-2004, Gas-Fired Pool Heaters, details test and examination criteria for pool heaters for use with natural, manufactured and mixed gases, liquefied petroleum gases, and LP gas-air mixtures. Pool heaters are designed to heat non-potable water stored at atmospheric pressure, such as water in swimming pools, spas, hot tubs and similar applications. ANSI Z21.56b is developed by CSA America, which is a division of ANSI member CSA International, Inc.

This "standards snapshot" was made possible by the steady stream of press information disseminated by standards developing organizations to keep the ANSI Federation abreast of their achievements. As the Institute receives news of published voluntary standards and voluntary standards initiatives with broad appeal and impact, similar articles will be posted to the ANSI Online News page. Please continue to forward your updates to the Communications and Public Relations department at (f) 212.398.0023 or (e) For additional information on the wide array of standards applications, see the Media Tips and Case Studies section of the Institute's website.