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Contents contributed and discussions participated by Damonte Johnson

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Damonte Johnson

SPACE.com -- Stars Become Two-Faced When They Explode - 0 views

www.space.com/...plosions-two-faces-100630.html

stars space supernova very credible source lead researcher at University oldest comment is from yesterday newest comment is from today

shared by Damonte Johnson on 01 Jul 10 - Cached
  • Damonte Johnson on 01 Jul 10
     
    Story about supernova's and their second faces
Damonte Johnson

How Loud Is Too Loud? Bookmark [NIDCD Health Information] - 1 views

www.nidcd.nih.gov/...ruler.asp

loud NIDCD decibels decibel levels

shared by Damonte Johnson on 30 Jun 10 - Cached
  • Damonte Johnson on 30 Jun 10
     
    The national institute on deafness and communication disorders gives me decibel levels of everyday things people might hear. It gives what decibel levels are safe and which ones are dangerous.
Damonte Johnson

News : New study provides guidelines for safe levels of iPod listening - 1 views

www.deafnessresearch.org.uk/els+of+iPod+listening+3211.twl

study news iPod deafness

shared by Damonte Johnson on 30 Jun 10 - Cached
  • The study, by researchers at the University of Colorado at Boulder and Children's Hospital in Boston, indicates a typical person can safely listen to an iPod for 4.6 hours per day at 70 percent volume using stock earphones, according to Cory Portnuff, a doctoral researcher in CU-Boulder's speech language and hearing sciences department.
  • The researchers found that listening to music at full volume through an iPod for more than five minutes a day using stock earphones can increase the risk of hearing loss in a typical person
  • Typical individuals can tolerate about two hours a day of a decibel unit known as 91-dBA before risking hearing loss, Portnuff said. The term dBA stands for "A-weighted decibels, a scale that takes into account that the human ear has different sensitivities to different frequency levels,"
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  • Loud sounds can stress and potentially damage delicate hair cells in the inner ear that convert mechanical vibrations, or sound, to electrical signals that the brain interprets as sound. "Over time, the hair cells can become permanently damaged and no longer work
  • No one set of earphones is more dangerous than another," he said. "While isolator style earphones are capable of producing higher levels of sound than earbuds, most people use them at a lower volume than earbuds because they block out background noise. It's important to monitor the level of volume control settings."
  • Damonte Johnson on 30 Jun 10
     
    Website specifically on iPod vollume levels. It was a study done back in 2006 but with the new iPods with louder music it can only get worse.
Damonte Johnson

Teen Health - Health Topics - Hearing - 0 views

www.cyh.com/...HealthTopicDetails.aspx

teen health ears music decibels

shared by Damonte Johnson on 30 Jun 10 - Cached
  • The amount of energy in the noise and the damage it can do to your hearing increases very rapidly as it gets louder. In fact, noise energy doubles for every 3 decibels (3dB) increase in the loudness of the sound - and 3dB is such a small increase in loudness that you probably wouldn't even notice it.
  • What sort of noise causes the harm? For young people in particular, the most dangerous noise is amplified music, for example in gigs and clubs. Headphones, car stereos and mobile phones are also having a bad effect on the hearing of young people.
  • Research shows that 25% of people listen to headphones at a level that will cause hearing damage. Follow the 60/60 rule - don't have your player above 60% of the maximum volume, and don't listen to it for more than 60 minutes at a time.
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  • One study suggests that listening to headphones at 80% for 90 minutes a day can lead to hearing loss. The authors say that this can take years for the damage to show up, so young people might not notice a loss of hearing until they are in their late 20s. At 100% for only five minutes you could do damage.
  • dulled hearing difficulty in understanding speech feeling full inside your ears ringing or high-pitched noise in your ears
  • In night clubs - where much of the damage is done - do not stay long, don't go too often and keep well away from the loudspeakers - or go somewhere else where the music is not so loud.
  • Damonte Johnson on 30 Jun 10
     
    Information specifically on the effects on teens and the teenage ear
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