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Audiometric Symbols - American Speech-Language …
https://www.asha.org/policy/GL1990-00006/
The air conduction threshold symbols should be drawn on the audiogram so that the midpoint of the symbol centers on the intersection of the vertical and horizontal axes at the appropriate frequency and hearing level (for example, see Figures 2, …
1910.95 - Occupational Safety and Health Administration
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.95
1910.95 (d) (2) (i) All continuous, intermittent and impulsive sound levels from 80 decibels to 130 decibels shall be integrated into the noise measurements. 1910.95 (d) (2) (ii) Instruments used to measure employee noise exposure shall be calibrated to ensure measurement accuracy. 1910.95 (d) …
Overview - Occupational Safety and Health Administration
https://www.osha.gov/noise
Standards. OSHA requires employers to implement a hearing conservation program when noise exposure is at or above 85 decibels averaged over 8 working hours, or an 8-hour time-weighted average (TWA). Hearing conservation programs strive to prevent initial occupational hearing loss, preserve and protect remaining hearing, and equip workers with the knowledge and hearing …
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 √ √ √ √ √ √
8 HEARING MEASUREMENT - World Health …
https://www.who.int/occupational_health/publications/noise8.pdf
Table 8.2. Maximum permissible background noise level during audiometric testing: Accordance with ANSI S3.1-1991, OSHA table D-2 (1981), and OSHA table D-1 (1983). Levels shown are octave-band sound pressure levels (dB re 20 µPa) for ears covered with standard MX41/AR cushions. Octave-Band Center Frequency 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
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