## 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

Sound intensity can be found from the following equation:_{w} - speed of observed sound.Now we have a way to calculate the sound intensity, so lets talk about observed intensity. The pressure variation, amplitude, is proportional to the intensity, So it is safe to say that the larger your sound wave oscillation, the more intense your sound will be.
This figure shows this concept.

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:*β - *decibel levelI - Observed intensityI_{0}- Reference intensity.For more on decibels, please refer to the Decibel Atom.

For a reference point on intensity levels, below are a list of a few different intensities: