Story highlights The beeping starts softly and gets louder over the course of about a minute

"We don't even notice it because we're so used to it," the homeowner said

(CNN) Jerry Lynn hasn't had a quiet evening in 13 years.

Every night at 6:50 ET -- 7:50 during daylight saving time -- the alarm clock stuck in the Pennsylvania homeowner's living room wall rings. And rings. And rings.

"It doesn't bother us," Lynn told CNN. "It's kind of cute."

Lynn thought the clock's batteries would run out within two or three months.

But every night since he dropped it down the second-floor air vent in September 2004, the incessant beeping starts like clockwork. It starts off softly, then gets louder and louder.

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