: While decibels (dB) measure the physical pressure of a sound wave, sones measure how a human ear actually hears it. One sone is typically defined as the loudness of a 1,000 Hz tone at 40 dB.
Outside of entertainment codes, it is important to distinguish this from the scientific unit . SONE-053
: You will often see "sone ratings" on household appliances like bathroom fans or kitchen hoods to indicate how quiet or loud the motor sounds to the average person. Misidentifications : While decibels (dB) measure the physical pressure