Sounds of Music

What note is shown below?

• D

• E

• F

• G

• A

A bird sitting on a tree is exactly 100m away from me.

It sings a pure note of 480Hz. If the speed of sound in

the air is 343m/s, what is the wavelength of the bird’s

song?

• 71cm

• 140cm

• 280cm

• 343cm

• 480cm

Klebb plays a one octave A major scale on the piano,

ending and beginning on two As one octave apart.

How many notes were played on the black keys?

• 0

• 1

• 2

• 3

• 4

Two waves with frequencies 420 Hz and 424 Hz inter-

fere. What is the beat frequency between them?

• 2 Hz

• 4 Hz

• 6 Hz

• 422 Hz

• 844 Hz

The “pitch” of a note can be measured of which phys-

ical property of a wave?

• Amplitude

• Wave energy

• Frequency

• Velocity

• Wavelength

A string that is 18 cm long is plucked so that a standing

wave forms. The string then vibrates at its fundamen-

tal frequency. What is the wavelength of the standing

wave?

• 9 cm

• 18 cm

• 27 cm

• 36 cm

• 72 cm

Using the Hornbostel-Sachs classification system,

woodwind instruments are generally characterized as

what type of instrument?

• Aerophone

• Chordophone

• Electrophone

• Idiophone

• Membranophone

What interval is shown below?

• Major 3rd

• Minor 3rd

• Major 4th

• Perfect 4th

• Minor 5th

Allen has a pair of noise-cancelling earbuds. Which

of the following concepts or phenomena is behind the

noise-cancelling effect?

• Constructive interference

• Destructive interference

• Diffraction of sound

• Reflection of sound

• Refraction of sound

Sound waves are best modeled with what type of

wave?

• Elliptical waves

• Sine waves

• Sawtooth waves

• Square waves

• Triangular waves