A frequency of oscillation capable of being perceived by the human ear, generally between 20 and 20,000 Hz.
- ‘However, we believe most engineers would have discounted adverse effects from audio frequency magnetic fields at a distance of 60 to 70 metres.’
- ‘Now, the station's six o'clock newscast can be heard in Spanish Monday through Friday on a separate audio frequency on newer TVs and VCRs.’
- ‘Such a signal resides in the audio frequency band.’
- ‘Spectrogram analyses of the audio frequency of the imitations were nearly perfect matches to the original sounds.’
- ‘It is designed to faithfully reproduce and amplify analog signals well beyond the normal audio frequency range of 20 to 20k Hz.’
- ‘One objection that had been raised in the past is that this rate is too slow for motors to cause oscillations at audio frequencies.’