Change your battery if the sound is coming from your smoke detector. Test your smoke detectors once a month. Do this by pressing and holding in the test button on the face of the smoke detector. Once you hear the noise, take your finger off the test button. The smoke detector should reset itself in about 10 seconds.
Smoke detectors do wear out.
Have someone go inside the bedroom with the door shut and see if they can hear the smoke detector noise when it is being tested. You should replace the detector if it's not loud enough to wake someone up. If your bedrooms are spread out throughout the house, you probably need a smoke detector outside each bedroom. Holiday Driving Safety Tips Make sure your car is in good operating condition. Check all fluids and the air in your tires.