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Tasha Dickerson

Rock Candy - 1 views

candy.about.com/...rock_candy.htm

shared by Tasha Dickerson on 11 Jul 12 - Cached
  • Tasha Dickerson on 11 Jul 12
     
    Rock candy is a simple sugar candy that can double as a science experiment. The process can take up to a week, but it's fun to watch the sugar crystals growing over time. Note that the exact quantity of sugar syrup you will use depends on the size of the jar you have.
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.
  • ...3 more annotations...
  • 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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