Hewitt Ch 21

What most distinguishes noise from music is the presence of

• pitch
• sympathetic vibrations
• regularity
• amplitude

Distinguish between noise and music.

• Noise is made of periodic waves, whereas music is made of irregular waves.
• Noise has a constant loudness, whereas music has a variable loudness.
• Noise is high frequency, whereas music is low frequency.
• Noise is made of irregular waves, whereas music is made of periodic waves.

What are the three principal characteristics of musical tones?

• Attack, decay, sustain
• Pitch, loudness, frequency
• Quality, quantity, harmonics
• Pitch, loudness, quality

The pitch of a note has most to do with

• intensity
• frequency
• overtones
• amplitude

How does a high-pitch musical note relate to frequency?

• High pitch is how the ear perceives high frequencies.
• Pitch and frequency are identical..
• High pitch is how the ear perceives low frequencies.
• High pitch is how the ear perceives ultrasound frequencies

How does the highest pitch one can hear vary with age?

• It increases.
• It decreases.
• It increases and then decreases.
• It stays the same.

The pitch of a note on a guitar string can be increased by increasing th

• tightness of the string
• length of the string
• mass of the string
• mass, length, and tightness of the string

Which of these can be most accurately measured?

• Loudness of sound
• Neither intensity nor loudness of sound
• Intensity of sound
• Either intensity or loudness of sound

What feature of sound is measured in decibels?

• Loudness
• Intensity
• Either intensity or loudness
• Neither intensity nor loudness

What does a decibel measure?

• A decibel is a logarithmic measure of sound frequency.
• A decibel is a logarithmic measure of sound intensity.
• A decibel is a logarithmic measure of sound resonance.
• A decibel is a logarithmic measure of sound quality.