Sound & Acoustics MCQs with Answers

One-liner

In a stationary wave, the particle velocity at the node is zero because nodes are points of zero displacement where destructive interference permanently cancels out motion.

One-liner

The velocity of sound is greatest in steel because sound travels fastest in solids due to closely packed particles that transmit vibrations more efficiently.

One-liner

In a radio station, a person talks into a microphone, which converts sound waves into electrical signals for transmission.

One-liner

The wave equation is v = fλ, where velocity (v) equals frequency (f) multiplied by wavelength (λ).

One-liner

The perception of sound intensity is called loudness.

One-liner

Louder sound is characterized by High Amplitude because amplitude determines the energy and intensity of a sound wave, which our ears perceive as loudness.

One-liner

Frequency of sound remains unchanged when it travels from one medium to another.

One-liner

The speed of sound in air becomes double of its value at 27°C at 927°C.

One-liner

The ratio is 1:1 because the velocity of sound in air is independent of pressure at a constant temperature.

One-liner

The inaudible sound is 22,000 Hz (above 20,000 Hz), which falls in the ultrasonic range beyond human hearing.