Sound Research WIKINDX |
Resource type: Journal Article Peer reviewed BibTeX citation key: Howard2004 Email resource to friend View all bibliographic details |
Categories: General Keywords: Hearing, Ultrasound Creators: Hansen, Howard, Zander Collection: Journal of Occupational Health and Safety - Australia and New Zealand |
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Abstract |
"Research has indicated that airborne ultrasonic sound impinging on the ear drums of humans has the potential to cause undesirable effects. The United States of America’s Occupational Health and Safety Administration have changed their guidelines to permit an additional 30dB increase in the acceptable ultrasonic amplitudes under certain conditions. This paper contains a review of current recommended acceptable exposure limits from standards organisations around the world." |
Notes |
Deals with airborne ultrasound up to 50kHz.
Added by: Mark Grimshaw-Aagaard Last edited by: Mark Grimshaw-Aagaard |
Quotes | ||||||||||||
p.254
Concensus on ultrasound exposure in SPL below 4 hours.
Later (p. 258) cites recommendations (American Conference of Governmental Industrial Hygienists) suggesting that exposure levels may be 30dB higher than the above. Added by: Mark Grimshaw-AagaardKeywords: Hearing Ultrasound |
Paraphrases |
p.259
Claims that the output at 1m of some parabolic speakers is +130dB and even as high as 140dB.
Added by: Mark Grimshaw-Aagaard
Keywords: Hearing Ultrasound |