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Unit of intensity of sound is Decibel(dB)
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The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2).
1 micropascal (μPa) = 10-6 Pa – commonly used when measuring sound pressures. decibel (dB) – a measure of the intensity of a sound; 1/10 of a Bel. Decibels are a relative unit comparing two pressures; therefore, a reference pressure must also be indicated.
Sound intensity may be measured in units of energy or work—e.g., microjoules (10-6 joule) per second per square centimetre—or in units of power, as microwatts (10-6 watt) per square centimetre. Unlike loudness, sound intensity is objective and can be measured by auditory equipment independent of an observer's hearing.
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decibel is the s.i unit of intensity of sound
watt / metre ² is the absolute unit of intensity of sound
Thus, sound intensity has been evaluating power per square meter.
In fact, common unit of power is measuring as Watt and unit of SI is called the decibel.
I is the intensity of the sound. It is expressed in watts per meter and IO is the reference intensity as defined to be 10-12w/m2.
Unit of intensity of sound:-decibel Unit of work:-Joule
The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2). One application is the noise measurement of sound intensity in the air at a listener's location as a sound energy quantity