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Test your hearing (and age)

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(Gabe Palmer / CC BY-ND 2.0)

Listen carefully. Can you hear that sound?

Clicking the play button [...] will produce a tone that is generally only heard by people under the age of 25. It has been used as a deterrent device to keep teenagers from loitering in malls and shops, and sounds similar to a buzzing mosquito. The elderly and people with hearing damage often cannot hear the sound.





link: The Teenager Audio Test

**related: Name that tune

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