Question
Download Solution PDFSound of frequency below 20 Hz known as _________.
This question was previously asked in
Navik DB 27th April 2025 Memory Based Paper (Section I)
Answer (Detailed Solution Below)
Option 1 : Infrasonic.
Free Tests
View all Free tests >
CRPF Constable (Technical & Tradesmen) Full Mock Test
100 Qs.
100 Marks
120 Mins
Detailed Solution
Download Solution PDFCONCEPT:
- Supersonic speed: An object moving with a speed greater than the speed of sound is said to move with a supersonic speed.
Frequency can be divided into three categories based on their frequency range:
- Audible sound waves: The frequency range of this wave is 20Hz - 20000Hz. Humans can easily detect these types of waves.
- Example: Sound produced by Vocal cords.
- Infrasonic waves: The frequency range of these types of waves is below 20Hz. Humans cannot detect it.
- Example: Sound produced by Earthquake, Volcanic eruption and ocean waves, etc.
- Ultrasonic waves or Ultrasound waves: The sound frequency above 20,000Hz or 20 kHz is known as ultrasonic waves. Humans cannot detect it too.
EXPLANATION:
- Infrasonic is the sound waves having a frequency of less than 20 Hz. So option 1 is correct.
Latest Indian Coast Guard Navik DB Updates
Last updated on Jun 11, 2025
-> The Indian Coast Guard Navik DB Notiifcation has been released for 50 vacancies under the 02/2026 batch.
-> Candidates can apply online from 11th June to 25th June 2025.
-> Candidates who have completed their 10th grade are eligible for this post.
-> Candidates must refer to the Indian Coast Guard Navik DB Mock Tests and Indian Coast Guard Navik DB Previous Year Papers to improve their preparation for the exam.