PS Ch. 13 *What Do You Know About Sound?

Sound is a disturbance that travels through a medium as a

• transverse wave.
• longitudinal wave.

The factors that affect the speed of sound include temperature, stiffness, and _________________ of the medium the sound travels through.

• density
• weight
• altitude

The pitch of a sound depends on the

• amplitude of the sound wave.
• frequency of the sound wave.
• speed of the sound wave.

The loudness of a sound depends on the energy and

• intensity of the sound wave.
• frequency of the sound wave.
• pitch of the sound wave.

The ________________ effect occurs because the motion of the source causes the waves to either get closer together or spread out.

• Decibel
• Echo
• Doppler

The loudness of a sound is measured in

• decibels.
• Hertz.
• wavelengths.

The lowest natural frequency of an instrument is called

• a fundamental tone.
• an overtone.
• noise.

A set of notes that combine in patterns that are pleasing is known as

• noise.
• music.

The flute is a

• percussion instrument
• stringed instrument
• brass instrument
• wind instrument

The sound quality of a musical instrument results from blending a fundamental tone with its overtones.

• True
• False