What is the unit of noise?

The unit of noise is typically measured in decibels (dB), which is a logarithmic scale used to express the intensity of sound and noise levels relative to a reference level. A change of 10 dB represents a tenfold increase in intensity, meaning that a sound measured at 80 dB is ten times more intense than one at 70 dB. In real-world applications, noise levels are monitored in various environments, such as urban areas, workplaces, and concert venues, to ensure they remain within acceptable limits for health and comfort. For instance, OSHA guidelines recommend that noise levels in work settings not exceed 90 dB for an 8-hour workday to protect employees' hearing.