Sound Pressure Meter

Sound Pressure Meter
Here is a basic circuit of "Sound Pressure Meter" to check the weight of sound. An am-meter of couple of miniaturized scale amperes is utilized as a part of its yield with a specific end goal to demonstrate the diversion relating to power of sound. The circuit sound weight meter uses a receiver, an operational intensifier, and a moving loop am-meter. Amplifier gets the sound to be measured and transform it into electrical flag relating to power of sound. 


The yield of mouthpiece is given to stick 2 of IC1 (TLC272) through bipolar capacitor C1, where IC1 is a 2-operational intensifier. Variable resistor VR1 is used to choose the intensification control associated with stick 1 and 2. The reference voltage is given to non-reversing pin (stick 3) of IC1 through resistor R3 and R4. As TLC272 (IC1) is a blend of two individual operational speaker, so for further intensification of half voltage of voltage at non-transforming input (stick 3) second operational enhancer is utilized.
A moving loop am-meter of 30 μA extend having inward resistance of 6.5 Kω is utilized as a part of its yield. 

Resistors (all ¼-watt, ± 5% Carbon) R1 = 10 Kω; R2 = 220 Ω; R3, R4 = 100 Kω; R5 = 8.2 Kω; VR1 = 500 Kω (preset) 

C1 = 10 μF/40V; C2 = 470 μF/16V; C3 = 4.7 μF/63V; C4 = 15 pF; C5 = 100 KpF 

IC1 = TLC272 (2-operational speaker); D1 – D4 = BAT85; D5 = 1N4148 Various SW1 = On/Off switch; M1 = 30 μA/6.5 Kω (am-meter); MIC1 = MCE2000


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