Human audible frequency range

Steps:

• Recall that healthy human ears detect sounds from 20 Hz to 20,000 Hz.
• Identify ranges where all frequencies fall within this audible spectrum.
• Eliminate options including infrasound below 20 Hz or ultrasound above 20,000 Hz.
• Select the option fully contained in the audible range.

Why C is correct:

• The range 50-5000 Hz lies entirely within the 20-20,000 Hz human hearing threshold, per standard audiology definitions.

Why the others are wrong:

• A includes 0-5 Hz, which is infrasound inaudible to humans.
• B includes 5-20 Hz, partly infrasound below the hearing threshold.
• D includes 20,000-50,000 Hz, which is ultrasound inaudible to humans.

Final answer: C