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Sound — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsSound1 Mark
MCQ
A 'hearing aid' is device that:
  • A
    Converts nuclear energy to sound waves.
  • ✓
    Converts sound waves to electrical signals, which are subsequently amplified before being converted back to sound waves.
  • C
    Convert sound waves to mechanical waves.
  • D
    None of the above
✓

Answer

Correct option: B.
Converts sound waves to electrical signals, which are subsequently amplified before being converted back to sound waves.
(b)
Converts sound waves to electrical signals, which are subsequently amplified before being converted back to sound waves.
Explanation:
Hearing aid is an electronic device used by people with hearing loss. It first converts sound waves to electrical signals, which are subsequently amplified by an amplifier before being converted back to clear and louder sound waves.

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