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How to Protect Workers from Noise
https://www.cdc.gov/niosh/z-draft-under-review-do-not-cite/noise/hcp/audio.html
Audiometric testing and audiograms An audiogram is a hearing test that measures the lowest level of sound that can be heard across several frequencies (pitches). Audiometric testing is required for employees exposed to noise above the Recommended Exposure Limit 85 dBA TWA. Perform annual hearing tests to monitor employees’ hearing.
Noise & Hearing Loss Prevention | NIOSH | CDC
https://www.cdc.gov/niosh/topics/noise/default.html
The NIOSH Recommended Exposure Limit (REL) for occupational noise exposure is 85 decibels, A-weighted, as an 8-hour time-weighted average (85 dBA as an 8-hr TWA) using a 3-dB exchange rate. Exposures at or above this level are considered hazardous.
Noise & Hearing Loss Prevention: Hearing Loss …
https://www.cdc.gov/niosh/topics/noise/preventhearingloss/hearlosspreventprograms.html
NIOSH recommends an improved criterion for significant threshold shift: an increase of 15 dB in the hearing threshold level (HTL) at 500, 1000, 2000, 3000, 4000, or 6000 Hz in either ear, as determined by two consecutive audiometric tests. The new criterion has the advantages of a high identification rate and a low false-positive rate.
HETA 89-100-2040 NIOSH INVESTIGATOR: ST. …
https://www.cdc.gov/niosh/hhe/reports/pdfs/1989-0100-2040.pdf
Ministry of Health to conduct audiometric testing on selected employees from several industries in St. Lucia, West Indies. This testing was a follow up on the initial effort of NIOSH to help in the development of a hearing conservation program for the Ministry of Health, Housing, and Labour (HETA 87-413).(1) Audiometric testing was
Audiometric testing using insert earphones | …
https://www.osha.gov/laws-regs/standardinterpretations/2013-03-11-0
Based on scientific developments and accepted practices in audiometric testing, NIOSH recommends that insert earphones may be used interchangeably with supra-aural earphones for obtaining audiograms. OSHA's original concern with audiometric testing using insert earphones was not whether they were reliable, hygienic or user-friendly.
Audiometry Procedures Manual - Centers for Disease …
https://www.cdc.gov/nchs/data/nhanes/nhanes_05_06/AU.pdf
examinees (such as children or adults). Table 1-1 summarizes the audiometric procedures included in each of the health examination surveys since 1960: Table 1-1. Review of NHANES audiometric procedures Pure tone testing Survey Years Age Tympanometry 250 500 1000 2000 3000 4000 6000 8000 Bone Speech NHES* I 1960-1962 18-74 √ √ √ √ √ √
Occupational Noise Exposure - Hearing Conservation …
https://www.osha.gov/noise/hearing-programs
Covers monitoring, audiometric testing, hearing protectors, training, and recordkeeping requirements. Hearing Conservation for the Hearing-Impaired Worker. OSHA Safety and Health Information Bulletin (SHIB), (December 27, 2005).
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