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COMP 419: Bender - Speech Science > Exam 1 > Flashcards

Flashcards in Exam 1 Deck (23)
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1

Sound

the vibrations of a sound source, transmitted through the air or another medium, that have the potential to stimulate the organs of hearing

2

Elasticity

the restoring force that causes an elastic medium to bounce back when stretched or displaced

3

Inertia

the tendency for motion or lack of motion to continue

4

Compression

molecules are closer together and the air pressure is tighter

5

Rarefaction

Molecules are farther apart and air pressure is lower

6

Sinusoidal motion or simple harmonic motion

moving back and forth a fixed number of times per second no matter how hard the tuning fork is struck

7

Amplitude

intensity or power of the sound

8

Wavelength

distance from any point in one cycle to the corresponding point in a neighboring cycle

9

Cycle

one cycle of vibration is completed at the point where the motion of a vibrating body or a pressure wave begins to repeat itself

10

Period

the time taken for each cycle of vibration

11

Frequency

the number of completed cycles (back-and-forth movements) per second; expressed in units of Hertz

12

Complex sound

sound having more than one sine wave component

13

Spectrum

an indication of the frequency and amplitude of each harmonic in a complex periodic wave

14

Periodicity

the pattern of vibration, however complex, repeats itself exactly over time

15

Aperiodicity

vibration is random and displays no repeatable pattern

16

Power/intensity

Magnitude of sound expressed in power or pressure; dB IL = 10(log10 Wo/Wr)

17

Pressure/SPL

force per unit area; dB SPL = 20 (log10 Po/Pr)

18

Resonance

vibratory response to an applied force

19

Natural Resonant Frequency

frequency in which the swing completes a cycle during 1 second

20

frequency from period (formula)

F =1/p

21

Period from frequency (formula)

P = 1/f

22

Wavelength from Period (formula)

fλ = c; c = 344 m/s; λ = c/f = 344(m/s)/200 Hz = 1.72 m

23

dB SPL

dB SPL = 20(log10 Po/Pr)