Db Meter Circuit

The display is calibrated in dbμ decibel referred to 1 microvolt.

Db meter circuit. Ge 552944652 at 28 92. Audio vu meter 9 leds 5 led vu meter kit is based on lb1409 ic from sanyo which will indicates the volume level of the audio signal it senses contact. The scale factor is 100mv db 1 so that an input signal of 100 dbμ results in an output voltage of 1 v. The main areas of application of decibel meter are audio level indicators record level indicator spectrum analyzers and the like.

Decibel meter the circuit below responds to sound pressure levels from about 60 to 70 db. 6 function mini clamp meter 14 99. We will use a normal amplifier circuit to amplify the sound signals and feed it to arduino in which we will use regression method to calculate the sound signals in db. 7 function digital multimeter.

It has 5 measurement domains between 70 and 120 db. Here is a interesting circuit by dreamlover technology noise meter used to measure the level of noise indicting by led and in addition it give warning when noise crosses the safe level of 30 db by beeping sound. Circuit description of noise meter. Radio decibel meter construction the meter circuit is best built on the printed circuit board shown in figure 2 but this is not available ready made.

The led indicator may work in line or spot mode. To check if the values obtained are correct we can use the sound meter android application if you have a better meter you can use that for calibration. Fuse buddy esi305m at 23 37. The diodes were scaled in db transmitting irn from d4 to d13 respectively the following weights.

The sound is picked up by an 8 ohm speaker amplified by a transistor stage and one lm324 op amp section. It is selected by placing the mode jumper. 7 function digital multimeter. Here is a design progress of my diy analog vu meter that i made.

The measurement range can identify noises from 30 dba to 130 dba which is the most common variety of noise levels a normal person is likely to encounter at work or in their everyday life. Microphone m1 is used to receive the acoustic signal and is coupled to c1 c2 r1 and r2. Noise pollution is tends to many non communicable diseases and. The vlike lcd digital audio decibel meter provides plenty of options for ensuring total safety for you friends staff and customers in a wide range of scenarios.

Add to cart add to my list. 6 function mini clamp meter. Reading accuracy is 0 5 db. 20 db 10 db 7 db 5 db 3 db 1 db 0 db 1 db 2 db 3 db.

I had some analog gauges from old akai cassette player lying around the workshop for ages an. Safe level of noise is considered up to 30 db. A decibel meter is an instrument to measure levels of input signal s in decibel units. Lm3916 vu meter circuit indicator rna 10 point reading field made of leds.

The project a versatile decibel meter circuit shows here provides a resolution of 20 steps.