Sound is measured in which unit?

Sound is measured in decibels, which is a logarithmic unit that quantifies sound intensity. Decibels provide a way to express the relative loudness of sounds, with each increase of 10 decibels representing a tenfold increase in intensity. This measurement is crucial in various applications, such as sound engineering, environmental noise assessment, and ensuring compliance with noise regulations.

Other units mentioned in the options have different specific applications; for example, hertz measures frequency, indicating how many cycles of a sound wave occur per second, while pascals measure pressure, and watts are units of power. Each of these alternatives plays an important role in understanding sound and its effects, but decibels specifically focus on the perception and intensity of sound itself.