an electrical signal which represents spoken or other sounds which vary with time, and may be in digital or analog form (this form implies a conversion to digital form before the digital data processing)
an example of an analogue signal
a whole lot simpler than a video signal
Any signal or sound that can be heard, as opposed to ultrasonic sound, radio-frequency information, or other signals inaudible to human hearing.
An audio frequency signal in electronic form or after conversion to sound.
An electrical representation of a sound wave in the form of AC (alternating current).
An electrical signal with varying voltage that becomes sound when amplified and converted to vibrations played by an audio speaker.