Sound Design Sound 2

Question 1

Which phenomenon causes a sound wave to bend around obstacles and spread into regions behind them?

Accepted Answer

Diffraction

Answer

Diffraction is the bending and spreading of waves around obstacles or through openings, and it explains why you can hear sound even when not in a direct line of sight.

Question 2

What term describes the number of complete wave cycles that pass a fixed point per second?

Accepted Answer

Frequency

Answer

Frequency, measured in hertz (Hz), is the number of complete oscillations or wave cycles per second.

Question 3

When two sound waves of slightly different frequencies combine, the resulting periodic variation in loudness is called:

Accepted Answer

Beating

Answer

Beating occurs when two frequencies close together interfere, creating a periodic rise and fall in amplitude at a rate equal to the difference between the two frequencies.

Question 4

At approximately what temperature does the speed of sound in air equal 343 meters per second?

Accepted Answer

20°C

Answer

At 20°C (68°F), sound travels through air at approximately 343 m/s; temperature increases raise this speed slightly.

Question 5

Which type of wave requires a medium to propagate and cannot travel through a vacuum?

Accepted Answer

Sound wave

Answer

Sound is a mechanical wave that requires a physical medium (solid, liquid, or gas) to transmit its energy, unlike electromagnetic waves.

Sound Design Practice Test

Sound Design Practice Test

Sound Design Sound 2