Inner ear damage in guinea pigs exposed to stable and impulse noise

摘要

Conclusin For seamen who are working in heavy noise environment, corresponding measures should be taken to protect their ears from noise which induces hearing loss. Objective To investigate the inner ear damage after exposure to stable noise, impulse noise and sta- ble plus impulse noise in guinea pigs. Methods Ninety-six healthy guinea pigs were di- vided into 3 equal groups. (1) Stable noise group: ex- posed to 110 dBA stable noise for 3 days, 4 hours per day.(2) impulse noise group: exposed to 165 dBA simulated cannon fire impulse noise 10 times success- sively at an interval of 10 seconds.