One way that noise can permanently damage your hearing is by a single brief exposure to a high noise level, such as a firecracker going off near your ear. But hearing damage can also occur gradually at much lower levels of noise, if there is enough exposure over time. To protect your hearing, you'll want to limit your exposure to these moderately high noise levels and give your ears a chance to recover after any period of noise exposure.
|Instantaneous permanent damage||140+||Shotgun, rifle, jetplane takeoff|
|Less than one second||130||jackhammer, heavy industry|
|Less than ten seconds
Threshold of pain
|1.5 minutes||110||Power tools, snowmobile|
|15 minutes||100||Chainsaw, motorcycle|
|2.5 hours||90||Lawn mower|
|8 hours||85||Beginning of Danger Zone|
|Prolonged exposure to noise levels 85dB and higher can result in permanent hearing loss.||80||City Traffic|
|70||Vacuum cleaner, hair dryer|
|60||Office, sewing machine|
|Common noise levels (dB), and their effect upon hearing.||10||Breathing|
|0||Threshold of normal hearing|
This product is designed for people with normal hearing only! The purpose of hearing protection is to reduce the impact of the sound and to reduce the potential for hearing loss. Hearing protection devices, including DefendEar products, do not eliminate sound. The user is responsible for determining whether the noise reduction provided by DefendEar products will provide adequate hearing protection based on the user’s unique medical history and exposure level. Your medical history, particularly any prior trauma to the ear or prior hearing loss, as well as the noise (decibel level and exposure time) the user will be exposed to should be considered prior to using DefendEar products. If you have any questions concerning the appropriate exposure levels or the level of hearing protection provided by DefendEar products, or if you have hearing loss or ear injuries, contact your local hearing professional before using.