Intensity Level of Sound

Intensity Level of Sound

### Formula

$$\beta=10\log\frac{I}{I_0}$$

### Terminologies

- β → Sound intensity level.

- I → Intensity of sound.

- I₀ → Reference intensity.

### SI Unit

$$decibel(dB)$$

### Conditions / Special Cases

Reference intensity:

$$I_0=10^{-12}Wm^{-2}$$

### Usage

- Used to measure loudness of sound.