Can you hear me now?

From NPR & NY Times:

New York Times, "A Ring Tone Meant to Fall on Deaf Ears."

It's about an invention from Britain called the Mosquito Teen Repeller, a device that sends out a high pitched tone that older adults can't hear. The intention was to disperse groups of teenagers with the annoying noise, but youngsters quickly figured out how to use the high frequency signal as a ringtone for incoming cell phone text messages. Kids in classrooms could hear the tones, but the older teachers couldn't.

Only teenagers can hear this sound. (audio) Most adults can't.

Can you hear it? Leave a comment or two.