The decibel unit is used for the intensity of sound. It quantifies the level of sound intensity based on a logarithmic scale, where each increase of 10 decibels represents a tenfold increase in intensity. This unit helps measure and compare the loudness or volume of sounds, ranging from faint whispers (around 20 dB) to extremely loud noises like jet engines (over 120 dB).
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The decibel (dB) unit is primarily used for [C] the intensity of sound. It provides a logarithmic scale to measure the loudness or intensity of sound waves. Decibels allow us to quantify sound levels across a wide range, from the faintest audible sounds to extremely loud noises that can cause hearing damage. This unit is crucial in various fields such as acoustics, engineering, and environmental science for assessing and managing noise levels.
Unlike options [A], [B], and [D], which are associated with different physical quantities (speed of light, intensity of heat, and frequency of radio waves, respectively), the decibel specifically denotes sound intensity. It helps describe how sound energy is perceived by the human ear, providing a standardized way to communicate and regulate sound levels in various contexts, from everyday environments to industrial settings and entertainment venues.