Audio characteristics refer to the qualities of sound that define how we perceive it. These include attributes such as pitch, which determines how high or low a sound is, and loudness, which indicates the intensity of the sound. Other important characteristics are timbre, which describes the color or quality of the sound, and duration, which refers to how long a sound lasts. Additionally, audio characteristics can be influenced by factors like frequency, measured in Hertz (Hz), which affects pitch, and amplitude, which impacts loudness. Understanding these characteristics is essential for fields like music production, acoustics, and audio engineering, as they help in creating and manipulating sound effectively.