職業性失聰介紹 - Introduction to Occupational Deafness (video in Cantonese with English subtitle) скачать в хорошем качестве

職業性失聰介紹 - Introduction to Occupational Deafness (video in Cantonese with English subtitle)

Source: https://odcb.org.hk/ 職業性失聰，是神經性失聰的一種，成因主要是長期在高噪音環境下工作而引致，當中的傷害，主要是噪音經過外耳的耳殼、耳道，及耳膜，然後進入中耳和內耳，噪音會慢慢破壞內耳的神經細胞，這些細胞一旦死亡，就不可以再生。受影響人士的聽力，因而會受到永久性的損害，逐漸形成失聰。在噪音環境下工作，噪音的劑量愈大，受損的程度便愈大。 Occupational deafness is a type of sensorineural hearing loss. It is caused by prolonged exposure to high level of noise at work. The noise passes through the outer ear, ear canal and ear drum and enters into the middle and inner ears. The noise damages the auditory cells of the inner ear. Once destroyed, these auditory cells would not recover. The resulting hearing impairment will be permanent, leading to hearing loss. When a person works in a noisy environment, the damage caused to his hearing will be in direct proportion to the intensity of the noise and the duration of exposure time.