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Dolder, C. N., Fletcher, M. D., Jones, S. L., Lineton, B., & Leighton, T. G. 2019, September 9–13, Exposure levels for parametric arrays in light of guideline ambiguities. Paper presented at 23rd International Congress on Acoustics. 
Added by: Mark Grimshaw-Aagaard (12/8/22, 6:43 AM)   
Resource type: Proceedings Article
Peer reviewed
DOI: 10.18154/RWTH-CONV-239179
BibTeX citation key: Dolder2019
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Categories: General
Keywords: Hearing, Ultrasound
Creators: Dolder, Fletcher, Jones, Leighton, Lineton
Collection: 23rd International Congress on Acoustics
Views: 1/33
"Recent revelations about ambiguities in guidelines for very-high frequency sound and ultrasound require many everyday devices to be revisited in terms of guideline compliance. One device that has a high ultrasound component but is designed for audio broadcast is a parametric array. Acoustic radiation for commercial parametric arrays was measured at a distance of 3.5 m in an anechoic chamber. The output of the device is compared against three international regulations and guidelines for ultrasound exposure. The authors found that the device was not compliant under the conditions tested in the laboratory."
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