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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
Infrasound can be heard by:
  • A
    Dog
  • B
    Bat
  • ✓
    Rhinoceros
  • D
    Human beings
✓

Answer

Correct option: C.
Rhinoceros
Rhinos have extremely good ears, picking up infra$-$sound far deeper than the range of human hearing.
Rhinos, can hear down to a frequency of four hertz, whereas even a human baby, with entirely undamaged ears, can normally only pick up sounds as low as $20$ hertz. Giraffes and elephants can also hear in this infra$-$sound range.

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