A room noise detector could serve as a burglar alarm during the night and when away from home, of course, if no noisy dogs or other pets. It could serve as a child protection device, near a door to the outside of the home or near a swimming pool gate to alert the adults of he child's presence near the pool, or a road with traffic.
examples of internal noise.thermal noise,short noise,i/f noise
Perhaps a two-stage process. Firstly, gain access to the electrical output in the smoke detector, that drives the noise transducer. Use this (amplified?) to drive the mechanism of your electrically-operated lock.
to detect maximum peak os AC signal and convert to DC signal
A Bolometer.
To use the PLL (Phase Lock Loop) as FM detector, you need to know the Free-running frequency.
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A noise detector is a device to use in detecting noise in a certain area or room. Detection device can be set or program accordingly to a desired level of noise or decibels (db) to activate the alarm for the detector,
If you make a noise, a man wearing just boxers will attack you
microphone
1) It can be used as a type of burglar alarm. 2) Someone who needs to know, for example, if a baby is crying.
examples of internal noise.thermal noise,short noise,i/f noise
by using a metal detector or looking everywhere for it
*Linearity is not defined *It doesnot take care about the noise and spurious signals therefore the output of balanced slope detectors may contain some noise
An ademco smoke detector is from the company Honeywell. It detects when a room is heating up. It alerts the owner when a fire is about to arise or if a fire has already started.
Of course soundproof foam will reduce the noise escaping from the room. If you cover the walls and ceiling there will be very little noise escape through the floor.
You dont ride as hard !