28 minutes | Aug 13th 2020

Understanding Acoustics for Dynamic Building Enclosures With Wind-Driven Kinetic Façade Systems

By Jim Leslie and Kevin Smith

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  1. The Los Angeles ordinance states: “Sound Level Meter” is an instrument including a microphone, an amplifier, an output meter, and “A” frequency weighting network for the measurement of sound levels which satisfies the pertinent requirements for Type S2A meters in American Standard Specifications for sound level meters in S1.4-1971 or the most recent revision thereof. (Amended by Ord. No. 156,363, Eff. 3/29/82.)
  2. Environmental Protection Agency Office of Noise Abatement and Control. Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare With an Adequate Margin of Safety. 550/9-74-004. March 1974. https://nepis.epa.gov/Exe/ZyPDF.cgi/2000L3LN.PDF?Dockey=2000L3LN.PDF
  3. Centers for Disease Control and Prevention. “What Noises Cause Hearing Loss?” Oct. 7, 2019. https://www.cdc.gov/nceh/hearing_loss/what_noises_cause_hearing_loss.html
  4. United States Department of Labor Occupational Safety and Health Administration. 1910.95 – Occupational Noise Exposure. Part 1910 Subpart G. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.95
  5. National Institute for Occupational Safety and Health. “Noise and Hearing Loss Prevention Guidance and Regulations” “Occupational Noise Exposure.” 1998. https://www.cdc.gov/niosh/topics/noise/reducenoiseexposure/regsguidance.html and https://www.cdc.gov/niosh/docs/98-126/pdfs/98-126.pdf?id=10.26616/NIOSHPUB98126
  6. National Institute on Deafness and Other Communication Disorders. “Noise-Induced Hearing Loss.” Updated March 2014. https://www.nidcd.nih.gov/health/noise-induced-hearing-loss
  7. Ibid.
  8. Hearing Health Foundation. “Hearing Loss & Tinnitus Statistics.” Accessed June 30, 2020. https://hearinghealthfoundation.org/hearing-loss-tinnitus statistics. See also: World Health Organization. “Deafness and Hearing Loss.” March 1, 2020. https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss
  9. The study did not evaluate noise at higher wind speeds. Higher sound levels may be expected, dependent on material selection and detailing; however, as wind speed increases, so does the surrounding ambient noise, which can mask that produced by the kinetic façade.
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