Teenagers who hang out inside one apartment building in Jamaica, Queens are getting an earful these days.

A new security device called "The Mosquito" has been installed in the lobby of a building on 170th St. where there have been chronic problems with noisy teens.

The wall-mounted device emits a high-frequency screech that can only be heard by people aged 13 to 25. Most older people cannot hear it.

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"It sounds like when you put a microphone close to the TV," said Jerry Brown, one of the younger residents, who admits the noise bothers him "a little bit."

Another teen added, "it's annoying."

But one young adult said, "it doesn't bother me."

The building superintendent said the mosquito has kept the lobby free of loitering teenagers, so far.