ASA S3.44-Part 1-2016 PDF Download

A method for calculating the anticipated hearing loss brought on by noise exposure is provided by the standard ANSI/ASA S3.44-Part 1-2016/ISO 1999:2013 (MOD). Based on various degrees and lengths of noise exposure, it determines the adult populations' permanent threshold shift, or change in hearing threshold levels. Based on the audiometric frequencies that were measured surpassing a specific threshold, this standard is used to identify hearing impairment. It permits the replacement of the LEX,8h measure of noise exposure with an equivalent effective level (EEL) with a different exchange rate. 

The standard covers any noise at frequencies below 10 kHz, regardless of whether it is constant, sporadic, fluctuating, or irregular. Its goal is to determine the likelihood that populations exposed to noise over an extended period of time will suffer from noise-induced hearing loss. The standard may, however, call for extrapolation for sound pressures greater than 200 Pa (140 dB relative to 20 Pa). To reduce the hazards related to excessive noise exposure, this standard offers a methodical and standardised way to estimate the effect of noise exposure on hearing thresholds.