Hearing damage and high powered sound equipment
Self infliction hearing loss
Frightening to think that 50 years back 10W per channel for a stereo system was classified as loud in a fairly large room whilst today 100W is merely entry level. The audio enthusiasts, and there are virtually millions of them, are no longer satisfied with just 200W per channel but are building systems in the kilowatt range for their home listening pleasure. Not only that, just how many youngsters are sticking very sensitive ear-plugs or head-phones into fairly powerful phones and iPods? While the mind police are playing around with the banning of cigarette smoking, lead and RoHS, alcohol and mercury tinged water our next generation is quietly killing themselves with music. Yes head room in an amplifier is one thing but head room for your ears is another.
Is it co-incidence that rock stars go deaf at an early age? Wasn’t it Beatle legend George Harrison whom stated his woes from tinnitus came from loud music through headphones. If you want some further information into our favourite rock-star, or any pop-star’s hearing impediments go to the Hearnet website. The problem with auditory loss is that more often than not it is permanent. I sit with this dilemma – two hours of loud music, sirens, explosions and rockfalls watching any movie I get tinnitus. Actually I have it all the time but one gets used to it. Listening to loud music one will realise that it gets softer over time as well. And no, it’s not an AGC or automatic gain control in your eardrums causing this, you are going deaf. Reaching for the syringe to inject water into the ear canal to clear wax buildup no longer works. You learn to lip read, you follow body language and suddenly you realise that this is not something which is just going to go away. It may take a while but the facts remain – it’s here to stay.
When the sound pressure level emanating from a speaker system is on par with that of a real live explosion next to one we realise the horror of modern high powered sound systems. Kids start becoming irritable at the movie house, perhaps even crying, should set warning bells off. If you can hear them. Movies, live concerts and your state of the art sound system is causing permanet hearing loss, not the environmental ‘unfriendly’ sound of cars coming down the street, the construction workers jackhammer or the helicopter overhead. We are doing this to ourselves. And I am one of them.
In the 1970s car audio was designed around that magical power of 4W~5W per channel. Then we bridged two audio outputs to get 20W and in the not very distant future we started building car audio with outputs exceeding 100W per channel. Here we are not looking at headroom, many of these audio amplifiers are run at full power, most of it into big bass bins in the boot or under the seat. It’s become so important to have a high powered system in the car that we now have competitions to boast of the SPL. Kilowatts is not uncommon, forget about 20W. Now just where did bass bins crawls into this winning formula? If the power output is so high that your shirt sleeves can be seen vibrating what is happening to those little bones in your ears?
Just how many music and movie fans have turned up the power of their systems to appreciate the extra headroom? Most. It may prove to be boasting rights but in all honesty having gobs of power to deliver into the speaker load makes one appreciative of modern designs and technology. High powered music systems are really a great investment if used properly. For explosions and other sound effects I wonder. In a real life situation this is what will make you permanently deaf. Ask any ex-service man. If they can hear you.
Maybe in a few years time we will have a new term to describe being shell-shocked.
(Admin/Moderator: These words are not necessarily our belief although being hearing impaired is certainly no joke. We have long listened to and appreciated musical instruments which are loud without been electronically amplified. This goes back thousands of years. Whether used as warning devices, in a musical concert (think steam driven organs or calliopes), trumpets and saxophones are loud, very loud. The question here may be more around sustained high levels of sound).