In a message dated 10/16/98 6:16:07 PM, nhunt@jagat.com wrote: <<". . A harmful noise level without use of a noise canceling device is just as harmful with the use of one." Jim, this is not true.">> Newton; As calmly as I can I must insist that it is. The devices we are speaking of are noise 'cancelling' devices and not a form of hearing 'protection'. What these jewels do is remove a perceptible noise and keep the noise, i.e. sound waves, from 'perceptibly' reaching the eardrum. They work by creating a reverse, or mirror image, of the sound frequency (ies) you want to attenuate as perceived or audible sound. They do nothing about keeping these sound waves, both of them, from reaching your eardrum. If these dillys worked for 'protection' as well as they work for 'cancellation' they would be mass marketed with a zeal and perspicacity the likes of which have yet to be seen. Jim Bryant (FL)
This PTG archive page provided courtesy of Moy Piano Service, LLC