Compulsory Audiometry (Hearing Testing), when is this required?

Many of our clients operate practical businesses in construction, engineering, manufacturing and similar sectors which expose their staff to noise.  Almost all of these businesses will have assessed employee exposure to noise and a majority of them will have had noise assessment completed by one of our consultants and a report issued explaining the exposures, legal duties and what might be able to be done to reduce or otherwise control noise exposures.

What is often less understood is that you also have a clear legal duty to carry out health surveillance for staff who are regularly exposed above the Upper Exposure Action Level of 85 dB(A).  Your noise report will identify who these staff are and you will then be required under the Regulations (Regulation 9) to provide audiometry (hearing tests.  Interestingly the employee is under a duty to attend these tests in addition to the employer’s duty to provide one but please note that these tests are typically required to take place during the employee’s normal working hours (in the absence of other arrangements being agreed by both parties.

Exceptions are rare but you may have staff who are only present in these hearing protection zones for short periods.  Please be wary of any signed disclaimers by staff (these are very likely worthless and likely to get you into further trouble) and beware of making audiometry ‘optional’ or making appointments and leaving it to staff to attend or not. Your duty of care means that you retain a duty to ensure staff do attend these appointments where they fall into scope.

Ideally, you will have a system which covers all staff already but if you are only just putting this into place then look to check all employees at first employment (if practicable) and every annually for the first two years of employment.  Beyond this, you may choose to move to less frequent checks unless otherwise advised with three yearly checks not being unusual.

Make sure whoever you are working with is qualified and reputable.  You will often find that a health surveillance partner is able to offer fr more than audiometry and so you can often combine checks for lung function, hand-arm vibration and similar with a single provider which can be useful as a single source of contact and be more efficient.  Make sure you retain the results of this health surveillance for at least 40 years as they provide very useful information in the event of a claim.

Finally, don’t be afraid of beginning this type of health surveillance.  At worst, you are only uncovering what is already there and you will then be able to make changes to address any concerns.  People will lose hearing as they age and some staff will have experienced hearing loss which has nothing to do with their work. However, being able to identify this through tests across your staff (for example, not everyone in a workshop will also play in a rock band at the weekend!) you will have great data to defend a health claim from the outliers in your data.  You will also be able to help your insurers defend a historical claim using data from other staff who have worked in the same or similar areas and not suffered hearing loss.

If you choose to bury your head in the sand and not complete any audiometry tests you are not only breaking the law, you’re also missing all of this data for your defence of any claim and your staff are still going deaf – whether from your own workplace or what they do when they’re not working!

If you would like to talk through noise exposure monitoring or if you are (or would be interested in becoming) a member of our Safety~net competent person scheme please get in touch or ask us to call you back

You can find further guidance on the HSE website here: https://www.hse.gov.uk/noise/healthsurveillance.htm

Posted by Roger Hart

Understanding noise exposure terms

Noise exposure terminology – Take a look at our explanatory video below and check below that for our glossary:

Exposure action values (EAV): Levels of noise exposure to noise at which certain actions need to be taken. The values are:

  • Lower exposure action values (LEAV):
  • daily or weekly exposure of 80 dB:
  • peak sound pressure of 135 dB;
  • Upper exposure action values (UEAV):
  • daily or weekly exposure of 85 dB;
  • peak sound pressure of 137 dB.
Exposure action values and noise exposure limit values
Daily or weekly personal average noise exposurePeak sound levelActions
Below lower exposure action valuesLess than 80 dB
(A-weighted)
Less than 135 dB
(C-weighted)
Reduce noise levels as far as reasonably practicable.
Lower exposure action values80 dB
(A-weighted)
or aboveCannot take the effect of hearing protection into account
135 dB
(C-weighted)
or aboveCannot take the effect of hearing protection into account
Undertake risk assessment. If any employees are identified as being particularly susceptible to noise, health surveillance should be implemented.

Make suitable hearing protection available.

Establish a maintenance programme for equipment supplied to reduce noise risk such as noise limiters and hearing protection.

Provide training.

Upper exposure action values85 dB
(A-weighted)
or aboveCannot take the effect of hearing protection into account
137 dB
(C-weighted)
or aboveCannot take the effect of hearing protection into account
Implement the actions required by lower exposure action values (above).

Establish and implement a programme of control measures.

If these measures are not sufficient to reduce exposure below 85 dB then:

  • suitable hearing protection must be worn; and
  • a health surveillance programme implemented.
Exposure limit values87 dB
(A-weighted)

Allowed to take hearing protection into account
140 dB
(C-weighted)
Allowed to take hearing protection into account
Must reduce to below limit values.

LAeq: The ‘equivalent’ continuous noise level that would deliver the same noise dose as a varying level over a given period, and is a good way of describing the average level of noise.

LEP,d: Daily personal noise exposure level. It is averaged over an 8-hour period rather than the actual time in the work environment.

LEP,w: Weekly personal noise exposure level. It is averaged over a period of 5 days (40 hours) by measuring the noise exposure on each of 7 days, then dividing the result by 5.
Limit values: See ‘Exposure limit values’.

Noise dose: See ‘Noise exposure’.

Noise exposure: ‘The noise dose’, which can be calculated, takes account of the actual volume of sound and how long it continues. Noise exposure is not the same as sound level, which is the level of noise measured at a particular moment.

Noise limiters: Sometimes known as volume regulatory device (VRD), controls noise exposure from amplified music. Modern noise limiters can be fitted with anti-tamper relays connected to external switches to improve system security.

Noise measurements: Decibels (dB) are used for measuring noise. A-weighting is used to approximate to the frequency response of the human ear. C-weighting is used to measure peak, impact or explosive noise.

Occlusion effect: Occurs when an object (like an unvented earplug) completely fills the outer portion of the ear canal. This changes the way sounds are produced in the ear canal, especially noises produced by the body (for example breathing, swallowing and noise travelling through bone and tissue.) The result is these noises appear louder.

Simple listening checks: An easy way of establishing whether there might be a noise problem. Where it is difficult to hold a normal conversation without shouting or where there is live amplified music (as in a pub, club or pop concert) it is probable that the noise is above the lower exposure action value.

Single number rating (SNR) value: Method of indicating the degree of protection offered by a hearing protector.

Sound restoration: Device in earmuffs that reduces ambient noise levels to allow relayed communication or other signals at a reduced level.

Three-decibel rule: The sound intensity doubles with every three dB increase. Thus sounds at 88 dB are actually twice as intense as they are at 85 dB and 115 dB is 1000 times as intense as 85 dB.

Tinnitus: Buzzing, ringing or tone in the ear. Temporary tinnitus is a warning; a sign that ‘you got away with it that time.’

VRD: Volume regulatory device (see noise limiter).

We carry out all noise assessments requirement using our experienced safety consultants.  If you have a need for noise assessment please call us on 01453 800100.

Posted by Roger Hart