Noise Induced Hearing Loss

Question 1

What are the effects of noise exposure

Answer 1

Depends on:
Intensity
Duration
Proximity
Period of absence
Impact/ banging noise above 140db will cause immediate hair cell damage

Question 2

3 types of noise exposure

Answer 2

1. Noise induced hearing loss : high intensity, long duration. Can cause a temporary threshold shift (hair cells bend but come back) or permanent threshold shift (hair cells stay bent)
2. Acoustic trauma: high intensity short exposure
3. Blast injury: explosive noise. Can cause conductive loss due to perforation or ossicular dislocation. Or can cause cochlea damage which would be a mixed or total loss