There’s an old saying
that “silence is golden”, and as far as biking is
concerned, that’s certainly the case if you’re the
rider (or the pillion for that matter). That new end can
you bought may make wonderful music when you wind it on, and
the induction growl from the bike’s airbox might
send a tingle up your spine, but even with the quietest helmet
on the market, at legal motorway speeds your ears may be subjected
to noise levels fifty to a hundred times higher than the allowed
industrial limits. And you don’t have to be travelling
to get a good dose of noise. Just sitting in a traffic jam can
hit your ears with noise levels approaching Concorde during
take-off. This is not good. Your passion for motorcycling could
risk making you deaf. There’s no cure and it’s not
reversible.
So what’s the answer? Well, it’s
quite simple – use earplugs.
“But I’ve ridden
for years without ear plugs and haven’t had any ill effects”.
That’s quite possibly true, but I bet you’ve had
ringing in your ears from time to time after a run, and each
time that happens you’ve done some damage. Deafness due
to exposure to high sound levels is cumulative, and it can be
thirty to forty years before you notice a problem. In pretty
much the same way that smoking a cigarette isn’t going
to kill you overnight, but in later life however you’re
going to be a sure-fire candidate for lung cancer.
Convinced now? Well I hope
so, because the alternative could be learning sign language
and lip reading before you’re sixty.
Earplugs are either disposable or made-to-measure
re-useable.
Disposable earplugs come in
four basic types; pvc foam, down-filled, polyurethane foam,
and rubber, but which is best for you can only be found out
by trial and error. Just because the press gives one particular
brand a good write-up doesn’t mean that it will work for
you, it just means that they worked for the journalist. You
don’t know whether his ears are the same as yours, and
how noisy was his helmet? You’ll want to use an earplug
that’s comfortable and fits well, but you also need to
know how effective it’s going to be in cutting down that
damaging noise. For this you need to know its SNR value, and
to explain what this is we’re going to have to get technical
for a moment.
The SNR is the “single
number rating” that determines the amount of noise protection
that the plug offers over an averaged spectrum of sound frequencies,
and it’s derived from the EN352 European standard. Earplugs
designed for use in noise hazard areas should be tested to this
standard and they can then be CE marked. But this in itself
doesn’t mean that they’ve ‘passed’,
just that they’ve been tested. The higher the SNR value,
the greater the level of noise attenuation the earplug will
offer. It’s not a linear scale though, and an increase
of three gives twice the protection, an increase of six gives
four-times the protection, and an increase of eight gives nine-times
the protection. Values of commercially available plugs range
from around 22 to 35, but for bike use 27 is about as low as
you’d want to go. If you’ve got a noisy helmet,
and most of them are – even the expensive ones, or you’re
doing high speed work like track days then you should be using
an earplug with a much higher value that this.
The made-to-measure and re-usable
earplug is custom-made for the shape of your ear canal and isn’t
usually tested because the one-off test cost would be prohibitive.
So there’s no way of knowing how well it will work, and
the harder material that they’re made of is usually less
effective at absorbing noise. And not only are they fairly expensive,
but as your ear canal shape constantly changes as you age, they’ll
need replacing every couple of years. This means that you’d
have to get through an awful lot of disposable plugs in a twenty
four month period to make them cost effective and you’d
be unlikely to have such good noise protection during this time.
Of the disposables, down-filled
are generally the least effective and most have low SNR values.
The earplugs are slim plastic sheaths filled with fibres and
some people find them difficult to fit in their ears. You also
need to be careful about damaging the outer sheath, as it can
be very dangerous to get the bare fibres in the ear canal. Foam
pvc plugs have medium SNR values and are perhaps the longest-running
type of plug around. The pvc material is quite resilient and
for some it can make this type of plug a little uncomfortable,
although others swear by them. The greatest range of earplugs
are made from polyurethane foam which is more comfortable, gives
a better fit for many than pvc, and also has better noise attenuation
properties. These make them suitable for very noisy environments.
Both these types of foam plugs have to be rolled up before they’re
inserted in the ear. Finally there’s rubber plugs. These
are a straight push fit and many have a rigid stem that can
be useful if you’ve got dirty hands(?). However, they’re
much less affective then either of the foam types. If you’re
the kind of person that’s prone to dropping things like
earplugs in muddy car parks, then you might want to consider
plugs joined together with a cord. Many types of earplug have
a corded option and the cord can be useful to help getting the
plug out of the ear. But don’t tug the cord sharply or
you could tear it away from the plug and be left with a lump
of foam stuck in your ear (been there, done that, but failed
to find someone who could sell me the T-shirt!).
| Earplug Type | Make | SNR |
| PVC Foam | EAR Classic | 28 |
| | EAR Grande | 34 |
| | EAR Amigo | 28 |
| Polyurethane Foam | Laserlite | 35 |
| | Multimax | 35 |
| | Max | 34 |
| | Maxlite | 34 |
| | 3M-1100 | 31 |
| | Down Bilsom 202 | 27 |
| Rubber | Airsoft | 30 |
| | Quiet | 28 |
| | Ultrafit | 25 |
| | Comfifit | 24 |
Although disposable plugs
are supposed to be use-once and throw away, most can be cleaned
and re-used a couple of times if you’re careful. The rubber
ones can be washed and re-used without problems and pvc earplugs
can be cleaned around three times before they should be discarded.
Polyurethane foam plugs are not supposed to be washed, but I’ve
found that if you’re careful then one clean up is possible.
Only down earplugs really can’t be washed at all. Earplugs
should be washed in warm water with a little detergent, fully
rinsed and carefully dried before use. But whether new or cleaned,
make sure that the plug is OK before you fit it in your ear.
If there are any signs of damage then throw it away and use
another one.
And that’s about it.
There’s no law that says you have to use earplugs when
riding your bike, but you’ve only got one set of ears
and for around only 50p for a pair of disposable earplugs it’s
worth hanging on to them.
Earplugs and hearing protection for motorcyclists
The Sound of Silence
feature by dick henneman
There’s an old saying
that “silence is golden”, and as far as biking is
concerned, that’s certainly the case if you’re the
rider (or the pillion for that matter). That new end can
you bought may make wonderful music when you wind it on, and
the induction growl from the bike’s airbox might
send a tingle up your spine, but even with the quietest helmet
on the market, at legal motorway speeds your ears may be subjected
to noise levels fifty to a hundred times higher than the allowed
industrial limits. And you don’t have to be travelling
to get a good dose of noise. Just sitting in a traffic jam can
hit your ears with noise levels approaching Concorde during
take-off. This is not good. Your passion for motorcycling could
risk making you deaf. There’s no cure and it’s not
reversible.
So what’s the answer? Well, it’s
quite simple – use earplugs.
“But I’ve ridden
for years without ear plugs and haven’t had any ill effects”.
That’s quite possibly true, but I bet you’ve had
ringing in your ears from time to time after a run, and each
time that happens you’ve done some damage. Deafness due
to exposure to high sound levels is cumulative, and it can be
thirty to forty years before you notice a problem. In pretty
much the same way that smoking a cigarette isn’t going
to kill you overnight, but in later life however you’re
going to be a sure-fire candidate for lung cancer.
Convinced now? Well I hope
so, because the alternative could be learning sign language
and lip reading before you’re sixty.
Earplugs are either disposable or made-to-measure
re-useable.
Disposable earplugs come in
four basic types; pvc foam, down-filled, polyurethane foam,
and rubber, but which is best for you can only be found out
by trial and error. Just because the press gives one particular
brand a good write-up doesn’t mean that it will work for
you, it just means that they worked for the journalist. You
don’t know whether his ears are the same as yours, and
how noisy was his helmet? You’ll want to use an earplug
that’s comfortable and fits well, but you also need to
know how effective it’s going to be in cutting down that
damaging noise. For this you need to know its SNR value, and
to explain what this is we’re going to have to get technical
for a moment.
The SNR is the “single
number rating” that determines the amount of noise protection
that the plug offers over an averaged spectrum of sound frequencies,
and it’s derived from the EN352 European standard. Earplugs
designed for use in noise hazard areas should be tested to this
standard and they can then be CE marked. But this in itself
doesn’t mean that they’ve ‘passed’,
just that they’ve been tested. The higher the SNR value,
the greater the level of noise attenuation the earplug will
offer. It’s not a linear scale though, and an increase
of three gives twice the protection, an increase of six gives
four-times the protection, and an increase of eight gives nine-times
the protection. Values of commercially available plugs range
from around 22 to 35, but for bike use 27 is about as low as
you’d want to go. If you’ve got a noisy helmet,
and most of them are – even the expensive ones, or you’re
doing high speed work like track days then you should be using
an earplug with a much higher value that this.
The made-to-measure and re-usable
earplug is custom-made for the shape of your ear canal and isn’t
usually tested because the one-off test cost would be prohibitive.
So there’s no way of knowing how well it will work, and
the harder material that they’re made of is usually less
effective at absorbing noise. And not only are they fairly expensive,
but as your ear canal shape constantly changes as you age, they’ll
need replacing every couple of years. This means that you’d
have to get through an awful lot of disposable plugs in a twenty
four month period to make them cost effective and you’d
be unlikely to have such good noise protection during this time.
Of the disposables, down-filled
are generally the least effective and most have low SNR values.
The earplugs are slim plastic sheaths filled with fibres and
some people find them difficult to fit in their ears. You also
need to be careful about damaging the outer sheath, as it can
be very dangerous to get the bare fibres in the ear canal. Foam
pvc plugs have medium SNR values and are perhaps the longest-running
type of plug around. The pvc material is quite resilient and
for some it can make this type of plug a little uncomfortable,
although others swear by them. The greatest range of earplugs
are made from polyurethane foam which is more comfortable, gives
a better fit for many than pvc, and also has better noise attenuation
properties. These make them suitable for very noisy environments.
Both these types of foam plugs have to be rolled up before they’re
inserted in the ear. Finally there’s rubber plugs. These
are a straight push fit and many have a rigid stem that can
be useful if you’ve got dirty hands(?). However, they’re
much less affective then either of the foam types. If you’re
the kind of person that’s prone to dropping things like
earplugs in muddy car parks, then you might want to consider
plugs joined together with a cord. Many types of earplug have
a corded option and the cord can be useful to help getting the
plug out of the ear. But don’t tug the cord sharply or
you could tear it away from the plug and be left with a lump
of foam stuck in your ear (been there, done that, but failed
to find someone who could sell me the T-shirt!).
Although disposable plugs
are supposed to be use-once and throw away, most can be cleaned
and re-used a couple of times if you’re careful. The rubber
ones can be washed and re-used without problems and pvc earplugs
can be cleaned around three times before they should be discarded.
Polyurethane foam plugs are not supposed to be washed, but I’ve
found that if you’re careful then one clean up is possible.
Only down earplugs really can’t be washed at all. Earplugs
should be washed in warm water with a little detergent, fully
rinsed and carefully dried before use. But whether new or cleaned,
make sure that the plug is OK before you fit it in your ear.
If there are any signs of damage then throw it away and use
another one.
And that’s about it.
There’s no law that says you have to use earplugs when
riding your bike, but you’ve only got one set of ears
and for around only 50p for a pair of disposable earplugs it’s
worth hanging on to them.
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