Audio frequencies refer to the range of sound waves that can be heard by the human ear, typically from 20 Hz to 20,000 Hz (20 kHz). These frequencies are categorized into different ranges, including bass (low frequencies), midrange, and treble (high frequencies). Each range contributes to the overall sound quality and character of music and speech. Different audio frequencies are produced by various instruments and sounds. For example, a bass guitar produces lower frequencies, while a flute generates higher frequencies. Understanding audio frequencies is essential in fields like music production, acoustics, and audio engineering, as it helps in creating balanced and clear sound.