Noise Level Notifier

This paper involves utilizing an Arduino Uno as the primary hardware to measure sound level in a library. The amount of noise region is measured using sensor. sensor signals are amplified operational amplifier function integrated circuit LM 567. There two types output available: audio and visual. takes form personalized message that played over speakers. LEDs employed offer visual feedback, with white used noise-free environments (sound 45 dB, yellow when levels above 65 decibels, red significantly 80 decibels). A TIP 220 transistor amplify signals. amplifies create for speaker. corresponds each level.