Rank: Forum user 
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Quick question .
does anyone knopw of any information regarding the difference effects of loud music verus loud 80 dBd same note fan noise .
regards
p
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Rank: Forum user
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I’m not sure it’ll be a quick answer, without more info.
Is the loud music at work or at a concert? Has it been measured? Is it just a loud radio in the office?
Is one compensating for the other? i.e. is the music being played loudly cause of the annoying fan?
Is the fan from a rotating office fan to blow round air? Is it a fan from a computer?
Once there is a bit more info, it might be easier to help.
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Rank: Super forum user 
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Like a lot of physical effects it's about dose over time, though if it's very very loud music the time needed to cause damage could be very very short, but like james says more info would be needed
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Rank: Super forum user 
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Remember though that decibels are decibels - does not matter what the source. As has been said, it is about dose. Bear in mind though that frequency plays a part, some frequencies are more annoying and the human ear responds differently according to the frequency. If you are above 80db get some competent advice.
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Rank: Super forum user
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I guess this is using a radio to drown out the fan noise?
If so the radio would add to the overall noise level and as such you risk changing the area from no protection to an optional hearing protection zone.
What is correct though is single tonal sounds can be a lot more distracting/irritating.
It normally wouldnt be difficult to argue adding minor noise into a area to reduce irritation (a radio), but in this case you are pushing yourself over the 80dBA level.
IMO, fix the fan / the source of the problem first
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Rank: Forum user
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the noise level is from a faulty extractor fan which has being measured to 80 plus dBd .there are controls in place such as switching off ,rotating staff out of the area and so forth and it is due to be fixed within a few weeks
in a safety meeting one of the guys made the comment that a loud radio /muisc if played at 80dbd had the same effect as any other noise at that level . While i agree to a point .i am now looking to see if the mulitude of frequencies ,tonal change and other patch work quilt of sounds that mades up music has a lessr effect on people .The single tone of the fan noise for want of a better word seems to get into your head more and effects concentration/dulls the senses . where as loud music seems to not have this effect .So i was wondering f there was any research /studies on this apparent difference .
thanks for your inputs
regards
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Rank: Super forum user 
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Hi Clifden, the fan noise is unwanted and seen as an intrusion whereas the radio is more likely to be seen as a benefit, hence the difference in perception and nuisance value.
The fan noise is unlikely to be pure tone and will be a mixture of frequencies due to harmonics.
The 80 plus dB measurement needs some context: is this close to the source or at the ear position, what weighting was used on the meter, how long is the exposure etc etc.
It will be most annoying to be subject to that kind of nuisance noise but when properly measured as a time-weighted average may well be less of a hearing-loss exposure than it appears. During an 8 hour shift, how much time is spent actually exposed to the noise, taking in to account breaks and other movements away from the specific work stations?
I share an office with another computer user and the fan on her machine irritates me intensely but presents no risk to my hearing, merely my blood pressure! Happily she is often away from her desk and the sleep function on her computer is a blessing.
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Rank: Forum user
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I completely agree that fixing the cause is the answer .does anyone know of any research into the effects of this sort of noise on concentration tried a couple of online searchs but not getting any info that seems to be noise specific .Thanks again to all for their inputs
regards
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Rank: Super forum user
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I believe tonal noise has a highing weighting for risk of environmental complaints. If your interested on research into noise and effects on human goggle the risks of noise and effects on the human heart. Also try http://scholar.google.co...+noise+and+concentration
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