Osicus User Guide V8
09/09/2021
Page
35
of
46
These recommendations are followed in the Osicus program, where the four categories, as they are
described on the screen, are as follows.
Category
Calculation
Action
1
Acceptable Hearing
Ability
Hearing within normal
limits.
Sum of hearing levels at 1,
2, 3, 4 and 6 kHz.
None
2 Mild Hearing Impairment
Hearing within 20th
percentile, i.e. hearing level
normally experienced by 1
person in 5. May indicate
developing NIHL.
Sum of hearing levels at 1,
2, 3, 4 and 6 kHz. Compare
value with figure given for
appropriate age band and
gender in Table A1.
Warning
3 Poor Hearing
Hearing within 5th
percentile, i.e. hearing level
normally experienced by 1
person in 20. Suggests
significant NIHL.
Sum of hearing levels at 1,
2, 3, 4 and 6 kHz. Compare
value with figure given for
appropriate age band and
gender in Table A1.
Referral
4 Rapid Hearing Loss
Reduction in hearing level
of 30dB or more, within 3
years or less. Such a change
could be caused by noise
exposure or disease.
Sum of hearing levels at 3,
4 and 6 kHz.
Referral
Unilateral Hearing Loss
Suggesting a problem due
to disease or infection
Sum of hearing levels at 1,
2, 3 and 4kHz for both ears.
If the difference between
the ears is greater than
40dB the individual should
be advised of the findings.
Referral
The HSE Categorisation Scheme
1.
NIHL: Noise Induced Hearing Loss
2.
Reference: HSE Controlling Noise at Work The Control of Noise at Work Regulations 2005, pg
118 & 119.
