A new study has shown that extended cell phone use causes hearing loss/damage. I'm not sure who pays the big money for these projects, but it doesn't take an ear scientist to figure out that prolonged use of high volumed devices shoved in your ear will damage it.

One doctor found that those who had used the phone for more than 60 minutes total a day for over four years had noticeable losses in high frequency hearing.

More details here: Hearing Loss in Phones.

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