Sound with frequencies below and above the audible frequency range are known…
2024
Sound with frequencies below and above the audible frequency range are known as ________________.
A. Feeble sound
B. Infrasound
C. Parasound
D. Ultrasound
Choose the correct answer from the options given below:
- A.
A and C
- B.
B and C
- C.
B and D
- D.
A and D
Attempted by 32 students.
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Correct answer: C
Correct answer: Infrasound and Ultrasound.
Explanation: The terms refer to sounds outside the human audible frequency range.
Audible frequency range for humans is approximately 20 Hz to 20 kHz.
Infrasound: frequencies below about 20 Hz (below the audible range).
Ultrasound: frequencies above about 20 kHz (above the audible range).
"Feeble sound" describes low loudness (intensity), not a particular frequency range, so it is not the correct term here.
"Parasound" is not a standard scientific term for sounds outside the audible frequency range.
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