Ring toness & adult hearing-how does this works?

Go here to find out:Ring toness %26amp; adult hearing-how does this works?
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phone rings - adult hears it - adult answers it?Ring toness %26amp; adult hearing-how does this works?
There was a news report today about this. Over time adults lose hearing in the highest ranges. So kids are setting ringtones to the highest possible pitches so they can send and receive text messages while in classes without the instructor hearing to ringtone.

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