So sad...
from wikipedia:
Quote:
Long term exposure to environmental noise
Populations of people living near airports or freeways are exposed to levels of noise typically in the 65 to 75 dbA range. If lifestyles include significant outdoor or open window conditions, these exposures over time can degrade hearing. The U.S. EPA and various states have set noise standards to protect people from these adverse health risks. The EPA has identified the level of 70 db(A) for 24 hour exposure as the level necessary to protect the public from hearing loss (EPA, 1974).
Noise-Induced Hearing Loss (NIHL) typically is centered at 4000 Hz.
The louder the noise is, the shorter the safe amount of exposure is. Normally, the safe amount of exposure is reduced by a factor 2 for every additional 3 dB. For example, the safe daily exposure amount at 85 dB is 8 hours, while the safe exposure at 91 dB(A) is only 2 hours (National Institute for Occupational Safety and Health, 1998). Sometimes, a factor 2 per 5 dB is used.
Personal electronic audio devices, such as iPods (which can reach 115 decibels or higher), can produce powerful enough sound to cause significant Noise-Induced Hearing Loss, given that lesser intensities of even 85 dB can also cause hearing loss.
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These concerts must be the cause of it, and the things she puts in her ears I always thought were NOT ear plugs, but headphones to be able to take direction from the producer/director, which would have to be on SUPER loud for her to be able to hear them over the whole concert...which is really sad cos it's the inner ear headphones (see the note on Ipod above) which can do the most damage wiithout you realising....
I hope the right ear isn't too bad, she can't let it deteriorate any further...
And all her fans should stop shouting and screaming so much!!!! whisper from now on! OK?!?!