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5th Semester
ME-502
Unit 5 Notes

ME-502 Mechanical Vibrations Unit 5 Notes

Notes and important questions for unit 5: Noise Engineering – Subjective Response of Sound.

Unit 5 · Short notes Noise Engineering – Subjective Response of Sound Frequency‑dependent human response to sound and the decibel scale · Relationship among sound pressure level (SPL), sound power level and sound intensity level · Addition, subtraction, averaging of sound levels; sound spectra and octave‑band analysis · Loudness, weighting networks, equivalent sound level, auditory effects of noise · Hazardous noise, exposure from machines/equipment, hearing conservation, damage‑risk criteria and daily noise dose · Noise sources, isolation and control – road and industrial sources, construction equipment, industrial noise control strategies at source, along the path and at the receiver

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