Other
American National Standards Institute
The home page of the American National Standards Institute.
Other
Noise Pollution Clearinghouse
THE Noise Pollution website. Large number of links covering a vast amount of information on all aspects of noise pollution.
Other
Npc: Dictionary of Noise Control
A large dictionary of words and terms related to noise control and pollution. A good starting place and/or excellent reference site.
Wikimedia
Wikipedia: Ansi
A Wikipedia description of the American National Standards Institute (ANSI).
National Institute of Standards and Technology (NIST)
International Systemn of Units (Si)
The official sources from which NIST forms its decisions for "official usage". Most useful if you're doing serious research about SI.