Decibel -

The is a logarithmic unit used to express the ratio between two values, most commonly sound intensity or electrical power. Unlike linear scales (like inches or pounds), the decibel scale compresses vast ranges of numbers into manageable figures, reflecting how human senses—specifically hearing—actually perceive change. Core Concepts

Understanding dB levels is crucial for hearing safety, as prolonged exposure to sounds over can cause permanent damage. Sound Level Source / Example Perceptual Context 0 dB Threshold of hearing Near silence 30 dB Whisper, quiet library Very quiet 60 dB Normal conversation 85–90 dB Lawnmower, hair dryer Danger Zone : Risk of damage over time 110 dB Chainsaw, rock concert Painful/dangerous after short exposure 140 dB Jet engine, gunshot Immediate hearing damage The "3 dB Rule" and Adding Sound Decibel

: The scale is not linear. An increase of 10 dB represents a 10-fold increase in sound intensity and roughly a doubling of perceived loudness. The is a logarithmic unit used to express

: Dedicated Sound Level Meters (SPL meters) use calibrated microphones to provide high accuracy for workplace or legal standards. Sound Level Source / Example Perceptual Context 0