Q

What is sound with frequency below 20 Hz called?

RRB Ministerial & Isolated Categories (All PGTs and TGTs) 10/09/2025 (Shift-II) 2025
✓ Answer: B Infrasonic sound
Infrasound has frequencies below the conventional lower human hearing limit of 20 Hz.
← Previous Question Next Question →

📚 Related Questions

1 What is the angle between the incident and emergent rays called in… 2 A ball of mass 50 g moves at 15 m/s. Find its… 3 The floating of an object on water is explained by: 4 How does the size of atmospheric particles affect the scattering of sunlight? 5 Which of the following best describes kinetic energy? 6 The sensation of sound is conventionally said to persist for about: