* Decibel (dB): This is the most common unit used to measure sound intensity, which is the amount of energy carried by sound waves. Higher decibel levels correspond to louder sounds.
* Phon: This unit measures loudness, which is the subjective perception of sound intensity. Loudness is influenced by factors like frequency and duration, so a sound with a certain decibel level might be perceived as louder or softer depending on these factors.
While decibel is the standard unit for measuring sound intensity, phon is used to measure how loud a sound is perceived by humans.
