Sound

What is the term for sound waves with frequencies above 20 kHz?

• Subsonic sound
• Audible sound
• Ultrasound
• Infrasound

How does the wavelength of a sound wave relate to its frequency?

• Wavelength increases as frequency increases.
• Wavelength is unrelated to frequency.
• Wavelength decreases as frequency increases.
• Wavelength is constant regardless of frequency.

Which of the following statements about the speed of sound is accurate?

• Sound travels faster in a vacuum than in air.
• Sound travels faster in liquids than in gases only.
• The speed of sound is constant in all media.
• The speed of sound in air at room temperature is approximately 343 m/s.

How do sound waves propagate in a medium?

• As both transverse and longitudinal waves
• As longitudinal waves only
• As transverse waves only
• As electromagnetic waves

How do sound waves behave when they travel through different media?

• They always travel at the same speed.
• They can be absorbed or reflected.
• They become inaudible.
• They change frequency but not amplitude.

Which of the following statements about sound propagation is true?

• Sound can travel through a vacuum.
• Sound requires a medium to travel.
• Sound waves are always transverse waves.
• Sound travels faster in a vacuum than in air.

What is the primary factor that determines the pitch of a sound?

• The speed of sound in the medium
• The amplitude of the sound wave
• The frequency of the sound wave
• The duration of the sound

What is the primary factor that determines the loudness of a sound?

• The frequency of the sound wave
• The duration of the sound
• The speed of sound in the medium
• The amplitude of the sound wave