Noise presentation 2 What is noise 1 2 What are the health effects of noise 3 Who is at risk 4 How can the risk from noise be reduced What is the problem with noise 3 Noise is part of everyday life but too much noise can cause permanent ID: 932263
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Slide1
Noise
Occupational Health Hazards
Slide2Noise presentation
2
What is noise?
1
2
What are the health effects of noise?
3
Who is at risk?
4
How can the risk from noise be reduced?
Slide3What is the problem with noise?
3
Noise is part of everyday life, but too much noise can cause permanent
and disabling hearing damage. This can be hearing loss that gets worse over time,
damage caused by sudden loud noises, or tinnitus.
With hearing damage, conversations becomes difficult or impossible, your
family complains about the television being too loud, you have trouble using the telephone and you may be unable to sleep. By the time you notice, it is probably too late.VideoAudio demonstration of noise induced hearing loss [4 mins - 4MB][1]
Slide4What is noise?
defined as “unwanted sound”
can be harmful and result in permanent hearing damage and loss
has 2 main characteristics
intensity
frequency
is measured in decibels (dB)
levels above 75 – 80 dB (A) known to cause hearing damage
4
Levels above 75 – 80 dB (A) can cause hearing damage
Slide5Decibel range
5
Hearing protection
shall
be worn whilst using all power tools that are over 80db, currently
all tools on site are over this. The tool id/tag identifies the level of noise produced.
Slide6What are the health effects?
Noise induced hearing loss is the most common preventable
occupational health condition in the world
6
Affecting approximately 250 million people
Slide7Ear hair cells
7
Normal hair cells
This is a picture of the top of a healthy hair cell. The
stereocilia
are standing in perfect rows
Damaged hair cells
This is a picture of the top of the hair cell that has been in a very loud noise. Look at what happened to the
steriocilia
. They are bent over. This hair cell will die and never send signals to the brain again. This is a cause of tinnitus (ringing in the ears)
Slide8How noise affects your health
8
Long-term health effects
Include sleep disruption, high blood pressure, stress related illness, headaches, heart problems, mental health and behavioural issues, and difficulty concentrating
Chronically ill
or
elderly
people are more sensitive to noise.
Children are more sensitive to loud noises
. Their ears register sound up to 20 decibels louder than adult ears.
> 64 decibels
The risk of high blood pressure rises by more than 90%90%
> 60 decibelsThe risk of high blood pressure rises by more than 25%25%
Slide9Who is at risk?
9
No noise exposure
9%
30%
Manufacturing
33%
Firefighters
36%
Agriculture
37%
Navy
42%
Airforce
44%
Carpenters
48%
Plumbers
50%
Army
60%
Construction
60%
Mining
Incidence of hearing loss
by profession (at 50 years of age)
Slide10How can the risk from noise be reduced?
10
The two most common types of hearing protection worn are ear plugs and ear muffs. To get the maximum benefit form these they must be work properly.
Remember
– earplugs are of little value if they do not fit snug and well with your ear – while if you don’t use ear muffs properly or they are damaged – there is no effective seal around the ear meaning that you have less hearing protection and increased risk form noise damage.
Slide11Thank you.
Questions?
Slide12