Monday, June 12, 2006

What Frequencies can 'you' hear?

This was of interest to me because of a recent article about kids in school setting their cell phone ring tones to high frequencies so only they could hear their phones ring.

The older "teacher" ears could not hear the ring tones. Sound unbelievable? Test your hearing with different frequencies of the same noise at the same volume.

This was an impressive demonstration and has really cool practical value for being sneaky...


read more | digg story

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