Overview of Intensity
Sound Intensity is the power per unit area carried by a wave . Power is the rate that energy is transferred by a wave.
The equation used to calculate this intensity, I, is:
Sound intensity can be found from the following equation:
Although the units for sound intensity are technically watts per meter squared, it is much more common for it to be referred to as decibels, dB.
A decibel is a ratio of the observed amplitude, or intensity level to a reference, which is 0 dB.
The equation for this is:
For a reference point on intensity levels, below are a list of a few different intensities: