E3S Web of Conferences (Jan 2023)

Noise Level Notifier

  • P.M Dinesh,
  • B Yogesh Bala,
  • S Manoj Kumar,
  • R.S Sabeenian,
  • M.E Paramasivam,
  • A Manjunathan

DOI
https://doi.org/10.1051/e3sconf/202339904011
Journal volume & issue
Vol. 399
p. 04011

Abstract

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