Noise Induced Hearing Loss

Question 1

What laws apply for excessive noise?

Answer 1

The control of noise at work regulations 2005 (enforced 2006)

The health and safety at work act 1974 (event safety in noise)

Question 2

What is DPNE?

Answer 2

Daily personal noise exposure, calculated over 8hrs

Question 3

What unit is the daily personal noise exposure (DPNA) measure in?

Answer 3

dB(a) decibel A-weighted

Can’t be added normally eg
90dB(a) + 90dB(a) = 93dB(a)

Question 4

What level of dB(a) will cause hearing damage?

Answer 4

Most people will suffer hearing damage with repeated exposure above 85dB(a)

Or

Even shock above 137dB(a)

Question 5

What factors influence noise induced hearing loss? (3)

Answer 5

Sound level / intensity

Proximity

How long exposed

Question 6

What types of hearing protect are available in workplace? (4)

Answer 6

Ear plugs
Moulded ear plugs
Ear muffs
Electronic devices

Question 7

Types of noise induced hearing loss? (3)

Answer 7

Noise induced hearing loss

Acoustic trauma

Blast injury