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The human ear can detect sounds in the frequency range from 20 Hz to 20,000 Hz. Dogs still judge silently.

✓ TRUE FACT
That 20 Hz–20 kHz range is a typical benchmark for young, healthy hearing. Sensitivity usually drops with age (especially above 12–15 kHz), which is why high frequencies fade first.

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The human ear can detect sounds in the frequency range from 20 Hz to 20,000 Hz. Dogs still judge silently. | SmartAss Facts