Which everyday process explains how noise-cancelling headphones work?
A
Reflecting sound waves outward
B
Absorbing sound with foam only
C
Increasing inner air pressure
D
Generating sound waves that cancel incoming noise
Correct Answer: Option D — Generating sound waves that cancel incoming noise
Explanation:
Noise-cancelling headphones use microphones to detect ambient sound and generate opposing sound waves that cancel out the incoming noise through destructive interference.