Discussion
The unit of measuring the intensity of sound is
Answer: D
The intensity (loudness) of sound is measured in decibels.
Sound intensity level is expressed on a logarithmic scale in decibels (dB): an increase of 10 dB means ten times the intensity. Normal conversation is about 60 dB and sounds above about 85 dB can damage hearing over time.
The watt is a unit of power, the joule of energy, and the calorie of heat. Intensity in absolute terms is in W/m2, but the unit used for the intensity of sound in everyday measurement is the decibel.
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