Impairment of the Hearing Function in Pistol Tester-Assemblers,
Abstract
The state of the acoustic function in 31 pistol tester-assemblers was studied. Their ages were from 25 to 45 years, period of service from one month to 2.5 years. For the workers subjected to prolonged action of industrial noise and vibrations, several types of audiograms were encountered that reflect different stages of the development of occupational deafness. The limited suppression of hearing can be represented in the form of a curve with a trough at 4000 Hz; earlier impairment persists over a relatively long period, and then slowly and to a less marked degree, covers 3000 Hz, 2000 Hz and lower frequencies. For those workers with a considerable degree of hearing impairment at 4000 Hz and higher, it was observed that with a relatively greater period of industrial service, there was retention of the normal perception of the lower sounds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 23, 1974
- Accession Number
- AD0780369
Entities
People
- P. S. Kublanova
Organizations
- National Air and Space Intelligence Center