Room Noise Detector Project Report

The 70 db setting is for living rooms.

Room noise detector project report.

Willard boyle and george e. The fascinating fact about the project sound detector circuit using op amp 741 is that it can be designed within a small area on a pcb or veroboard as well. Noise detector a room noise detector could serve as a burglar alarm during the night it could serve as a child protection device near a door to the outside of the home. The main purpose of doing this project is to build a detecting sensor to detect the noise level around us.

This circuit is intended to signal through a flashing led the exceeding of a fixed threshold in room noise chosen from three fixed levels namely 50 70 85 db. Mos technology is the basis for modern image sensors including the charge coupled device ccd and the cmos active pixel sensor cmos sensor used in digital imaging and digital cameras. The room noise detector circuit can detect the intensity of noise in a room and signal through a series of flashing led s. Place the small box containing the circuit in the room where you intend to measure ambient noise.

If the noise in the room exceeds a particular threshold it is indicated with the help of led s. If the led is steady on or flashes bright often then your bedroom is inadequate and too noisy for sleep. While researching the mos process they realized that an electric charge was the analogy of the magnetic bubble and that it could be stored on a. With sw1 in the first position the circuit is off.

To attain maximum possible gain of ic1 and sensitivity of ic2 adjust the respective values of potentiometer vr1 and vr2 as stated in the earlier paragraphs. This circuit is intended to signal through a flashing led the exceeding of a fixed threshold in room noise chosen from three fixed levels namely 50 70 85 db. Smith developed the ccd in 1969. The 50 db setting is provided to monitor the noise in the bedroom at night.

Unfortunately its price is usually prohibitive for a normal diy maker and the uv neons are expensive anyway if you re thinking of building one. Like that we can away from the noise which can influence our health or reduce the noise level. Three threshold noise levels like 50db 70db and 85db are fixed. A bromograph or uv exposure unit or uv screen exposure system is a fundamental instrument for making pcbs using the photo etching method.

Two op amps provide the necessary circuit gain for sounds picked up by a miniature electret microphone to drive a led.