BasicB-005-007-002
What approximate range of frequencies can most humans hear?
D
Answer
Transmitters, receivers, and measurements
Type
A
20 Hz to 30 000 Hz
B
300 Hz to 3 000 Hz
C
200 Hz to 200 000 Hz
D
20 Hz to 20 000 Hz
Answer Notes
The generally accepted biological range for human hearing spans from a low, deep bass at 20 Hertz (Hz) up to a high-pitched treble at 20,000 Hertz (20 kHz). This specific spectrum represents the mechanical vibrations in the air that a healthy human eardrum can detect.
The distractor '300 Hz to 3 000 Hz' represents the typical, restricted bandwidth used for intelligible human speech in voice communications (like a telephone or SSB radio), but it does not represent the full limit of human hearing. The other options simply provide numbers that extend far beyond what the human ear is actually capable of perceiving.
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Why is the range of frequencies from 20 Hz to 20 kHz termed audio frequencies?