Human audible frequency range

Steps:

• Identify the standard physiological limits for sound perception in young, healthy humans.
• Note the lower threshold where sound becomes audible, around 20 Hz.
• Recognize the upper threshold for high-frequency detection, up to 20,000 Hz in youth.
• Match these limits to the provided options for the full hearing spectrum.

Why C is correct:

• It aligns with the established audiology definition of the human hearing range (20 Hz–20 kHz), covering infrasonic boundary to ultrasonic edge for clear perception.

Why the others are wrong:

• A: Starts at 2 Hz, which is infrasound below audible range, not heard as sound.
• B: Caps at 2000 Hz, excluding higher frequencies like those in speech consonants or music highs.
• D: Identical to B, so same error in limiting upper range.

Final answer: C