O-LevelPhysicsWaves5054/12 · May/June 2023 · Q231 Mark
Ultrasound is a type of sound wave that is not audible to a healthy human ear. Which range of frequencies contains only ultrasound?
A30 Hz–3.0 kHz
B300 Hz–30 kHz
C3.0 kHz–3.0 MHz
D30 kHz–30 MHz
✓ Correct answer
D: 30 kHz–30 MHz
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