Vibration

Question 1

an oscillation is a sound wave that is always periodic in its waveform (T or F)

Answer 1

false

Question 2

what is a mel

Answer 2

a psychoacoustic unit of pitch correlated with frequency, but not a unit of frequency

Question 3

a 1kHz wave has a ___________ wavelength (in feet and meters)

Answer 3

1 foot or .33m

Question 4

In a standing wave, the pattern of nodes and loops is ___________

Answer 4

fixed

Question 5

nodes of a standing wave are positions of ___________ movement

Answer 5

little or no

Question 6

the fundamental mode of a sting fixed at both ends ___________ in frequency as the string lengthens

Answer 6

decreases

Question 7

In a string fixed at both ends (or a tube open at both ends) length L, the wavelength of the fundamental mode of vibration is ___________

Answer 7

2L

Question 8

the interval of the tempered fifth is defined as the ratio of ___________

Answer 8

702 cents

Question 9

the fourier theorem states that a ___________ can be analyzed as a sum of its ___________

Answer 9

periodic waveform, component harmonics

Question 10

fourier analysis shows that a periodic waveform can be analyzed as the sum of a set of ___________ , each having a specific ___________

Answer 10

harmonic sine waves, amplitude

Question 11

as the duration of a periodic waveform increases, one progressively perceives___________ , then ___________ and finally ___________

Answer 11

a broad-band transient, pitch, timbral character

Question 12

what is critical bandwidth

Answer 12

smallest distance between two simultaneous tones that can be detected - can activate different groups of hair cells

Question 13

amplitudes of individual harmonics in an acoustic sound are ___________ constant

Answer 13

never

Question 14

On a logarithmic scale, the harmonics are ___________ spaced

Answer 14

unequally

Question 15

the octaves are ___________ spaced

Answer 15

equally