Noise at work
Download
1 / 27

Noise at Work - PowerPoint PPT Presentation


  • 121 Views
  • Updated On :

Noise at Work. Awareness of Noise and Hearing Protection in the University of Sheffield. Scope of the Problem. In the UK there are over 170,000 people with significant work-related hearing damage 14,200 are serious enough affected to receive disablement benefit. Noise is an ancient problem!.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Noise at Work' - shadi


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Noise at work l.jpg

Noise at Work

Awareness of Noise and Hearing Protection in the

University of Sheffield


Scope of the problem l.jpg
Scope of the Problem

  • In the UK there are over 170,000 people with significant work-related hearing damage

  • 14,200 are serious enough affected to receive disablement benefit


Noise is an ancient problem l.jpg
Noise is an ancient problem!

  • Roman poets complained about the racket of iron cart-wheels on the cobbles


What is noise l.jpg
What is noise?

  • Unpleasant or unwanted sound

  • When unwanted noise gets loud enough

    • It is unpleasant

    • It is distracting

    • It is tiring & stressful

    • Higher levels cause permanent hearing damage


Likelihood of damage l.jpg
Likelihood of Damage

Depends mainly on:

  • Volume (loudness)

  • Frequency (pitch)

  • Exposure time

    Can be work exposure, social exposure or both


Damage can include l.jpg
Damage can include:

  • Temporary hearing loss

    • hearing returns after a short period away from noise

  • Permanent hearing loss

    • Permanent damage or destruction of hair cells in the ears.

    • Hearing cannot be restored


Signs of developing hearing loss l.jpg
Signs of developing hearing loss

  • Inability to hear soft or high pitched sounds

  • Trouble understanding conversation at a distance or in a crowd

  • Ringing in the ears

  • Others can hear something you can’t


There is no cure for hearing damage l.jpg
There is no cure for hearing damage!

  • Normal hearing can never be restored

  • Hearing aids do not restore noise-damaged hearing

  • At best, they help the person a little


Frequency of sound l.jpg
Frequency of Sound

Infra- Normal Ultra-

Sound Sound Sound


Noise levels l.jpg
Noise Levels

  • Ear is most sensitive to normal frequency sound

  • The dBA scale takes this into account when measuring noise levels


Measurement of noise loudness is measured in decibels l.jpg
Measurement of Noise Loudness is measured in decibels

170 dB Jet airliner

120 dB Riveting hammer

110 dB Shouting loudly

70 dB Street sounds

38 dB Quiet bedroom

This is a logarithmic scale – an increase of 1dB means about 30% more noise


What law applies l.jpg
What Law applies?

  • The Control of Noise at Work Regulations 2005 (Commencement date April 2006 except for music industry)

  • The Health & Safety at Work etc Act 1974


Risk assessment l.jpg
Risk Assessment

  • Observe procedures

  • Refer to standard data

  • If necessary, measure noise levels

  • Compare with action levels

  • Identify control measures


Action and limit values l.jpg
Action and Limit Values

  • Lower action value (LAV)

    • 80dBA – 8hrs Peak – 135dBA

  • Upper action value (UAV)

    • 85dBA – 8hrs Peak – 137dBA

  • Exposure limit value (ELV)

    • 87dBA – 8hrs Peak – 140dBA

    • Can take account of hearing protection


If your average daily exposure is over 80db a l.jpg
If your average daily exposure is over 80dB(A)

  • The employer must:

    • Inform you of the risks to your hearing from noise and how you can reduce those risks

    • Make hearing protective equipment available


If your average daily exposure is over 85db a l.jpg
If your average daily exposure is over 85dB(A)

Your employer must:

  • Try to reduce noise at source

  • Provide hearing protection & insist on its use

  • Identify & sign ear protection zones

  • Conduct noise assessments & keep records of them

  • Provide hearing checks if requested


If your average daily exposure is over 87db a l.jpg
If your average daily exposure is over 87dB(A)

  • This is a maximum & must not be exceeded

  • Noise to the ear must be reduced

    • Preferably at source

    • Otherwise by hearing protection


Control of noise l.jpg
Control of Noise

  • Preferably eliminate or reduce it at source eg

    • Maintenance & lubrication

    • Anti-vibration mounting

    • Sound absorbing materials

    • Enclosure

    • Reducing exposure time


Hearing protection l.jpg
Hearing protection

Ear Plugs

  • Must be kept clean (many are single use)

  • Must be put in properly (there is a special technique)

  • Generally comfortable to wear especially in hot weather


Hearing protection20 l.jpg
Hearing protection

Canal Caps

  • Like in-ear ear plugs on a headband

  • Pleasant to wear

  • Often do not completely seal in the ear

  • Generally not a good idea for >85dB for prolonged periods


Hearing protection21 l.jpg
Hearing protection

Ear Muffs

  • Must fit snugly – one size fits most people

  • Generally very effective if worn properly – beware of glasses

  • Tend to be uncomfortable in hot weather

  • Special types available eg. for wearing safety helmets, for workers near high voltage

  • Can be shared but cleaning routine required


Hearing protection22 l.jpg
Hearing protection

  • The effectiveness of hearing protection varies according to type, manufacture and correct wearing.

  • Most will reduce noise at the ear by about 15 - 20dBA

  • Don’t over-protect or warnings may not be audible


Hearing protection23 l.jpg
Hearing protection

  • Ensure it is suitable for the job

  • Regular maintenance & record keeping required

  • Home-made protectors don’t work (eg cotton wool)

  • Wear it when you are supposed to – you MUST BY LAW


Hearing protection24 l.jpg
Hearing protection

  • Try to limit your time in noisy areas

    • Remember the effect is cumulative


Hearing protection25 l.jpg
Hearing protection

Protect your hearing in a social context too eg:

  • Loud music

    • Personal stereos

    • Car entertainment

  • DIY & garden tools


Don t take noise for granted l.jpg
Don’t take noise for granted!

  • Hearing damage creeps up on you

  • Once it has happened, there is no cure


Further advice l.jpg
Further Advice?

  • Contact Safety Services

  • The Health & Safety Executive have a useful leaflet which can be found:

    http://www.hse.gov.uk/pubns/indg362.pdf