Which of the following is NOT a characteristic of sound?

Rhythm is not a characteristic of sound in the technical sense, whereas the other options—frequency, amplitude, and temporal—are fundamental properties that define sound waves.

Frequency refers to the number of vibrations or cycles per second of a sound wave, measured in hertz (Hz), and determines the pitch of the sound. Amplitude relates to the intensity or loudness of the sound, often described in decibels (dB). Temporal characteristics, although not as commonly used as the other two, typically refer to the timing aspects of sound, such as the duration and timing of sound events.

In contrast, rhythm is more of a musical or perceptual property related to the pattern of sounds over time, which does not inherently define sound waves themselves. Therefore, rhythm is not classified as a characteristic of sound in the same way that frequency, amplitude, and temporal aspects are.