Chapter 2 Sound Review

What is sound?

• A flow of electric current

• A type of mechanical wave that travels through a medium

• The movement of light through a vacuum

• A wave that does not need a medium to travel

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What is a vibration?

• A change in temperature of a wave

• A circular motion through space

• A rapid back-and-forth motion that produces sound

• A form of electrical energy

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What is a vacuum in relation to sound?

• A solid with lots of particles

• An area where sound travels faster

• A space without matter, where sound cannot travel

• A material that reflects sound

What does pitch describe in a sound wave?

• The strength of a wave

• The height of a wave

• The frequency of the wave that determines how high or low a sound is

• The echo of a wave

What is a hertz (Hz) used to measure?

• Loudness

• Speed

• Intensity

• Frequency

What is ultrasound?

• Sound below 20 Hz

• Sound above 20,000 Hz, often used in medicine

• The softest sound a human can hear

• Sound that echoes underwater

What is resonance?

• The bouncing of sound off surfaces

• The strengthening of a sound when an object vibrates at its natural frequency

• The breaking of sound waves in water

• The change in pitch as an object moves

What is the Doppler Effect?

• The increase in volume due to echo

• The weakening of sound intensity

• A change in the pitch of a sound caused by the motion of the sound source

• A reflection of a sound wave

What does intensity refer to in sound?

• How fast the wave moves

• The height of the sound’s frequency

• The amount of energy a sound wave carries

• The direction of sound

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What is a decibel (dB)?

• A unit for sound frequency

• A tool used in sound engineering

• A measure of sound intensity or loudness

• A type of sound

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