Q
A sound wave with a frequency of 15 Hz would be best categorized as which type?
RRB Group D
21 Aug, 2026 (12:45 PM - 2:15 PM)
2026
✓ Answer:
D
Infrasonic sound
The correct choice is Infrasonic sound. Sound behaviour is determined by wave properties such as frequency, amplitude, wavelength and the medium of propagation.