How is the intensity of sound or its loudness measured?

The intensity of sound or its loudness is measured in decibels (dB). Decibels provide a logarithmic scale to quantify sound levels, allowing for a more manageable way to express the vast range of human hearing sensitivity. This measurement reflects how our ears perceive variations in sound intensity, making it crucial for understanding noise levels in various environments, including workplaces.

Hertz is a unit of frequency, which indicates how many cycles of sound waves occur per second. While frequency is related to the pitch of a sound, it does not measure loudness. Pascals are units of pressure, which can be associated with sound pressure levels but do not specifically indicate how loud a sound is in terms of human perception. Decameters, a unit of length, are not relevant to measuring sound intensity. Thus, decibels are the standard and most appropriate measure for sound loudness.