Here's why:
* Intensity: The actual power of sound waves per unit area is measured in watts per square meter (W/m²). However, this unit is not very practical for human perception.
* Loudness: Humans perceive sound intensity logarithmically, meaning a small change in intensity can be perceived as a large change in loudness.
* Decibel: The decibel scale is a logarithmic scale that relates the intensity of a sound to a reference level. This makes it more intuitive to describe the loudness of sounds.
Key points:
* Reference level: The reference level for sound intensity is usually set at 0 dB, which corresponds to 10⁻¹² W/m².
* Logarithmic scale: A 10 dB increase in sound level represents a tenfold increase in sound intensity.
* Relative measurement: The decibel scale measures the relative intensity of a sound compared to the reference level.
Let me know if you'd like to know more about the decibel scale!
