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Sound — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsSound1 Mark
MCQ
How a blind person recognizes a person?
  • ✓
    Unique waveform of vocal cord of an individual
  • B
    Unique loudness of an individual
  • C
    Unique amplitude of sound of an individual
  • D
    All of the above
✓

Answer

Correct option: A.
Unique waveform of vocal cord of an individual
(a)
Unique waveform of vocal cord of an individual
Explanation:
Every individual have their unique waveform of vocal cord. By that we can identify any person without seeing him/her.

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