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Flashcards in Chapter 5 Deck (33)
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0
Q

Beats

A

Rhythmic increase/decrease due to constructive or destructive interference

1
Q

Amplitude

A

Size of wave from rest to crest or rest to trough

2
Q

Condensation

A

compression of gas molecules due to a vibration/pulse

3
Q

Cycle

A

a complete wave/vibration

4
Q

decibel scale

A

a loudness scale based on intensity level - logarithmic scale

5
Q

Doppler Effect

A

an apparent shift in the frequency of sound due to motion of the observer

6
Q

echo

A

reflected sound; has to arrive 0.1 s or more to be detected

7
Q

frequency

A

Number of cycles/vibrations in 1 second - unit is Hertz (Hz)

8
Q

fundamental frequency

A

lowest frequency that can be set up on a standing wave/stringed instrument

9
Q

hertz

A

unit of frequency

10
Q

infrasonic

A

sound waves having too low of frequency to hear below 20 Hz

11
Q

intensity

A

measure of energy carried by a wave

12
Q

longitudinal wave

A

causes particles to move closer together and further apart in the same direction the wave travels - travels through solid, liquid, and gas

13
Q

natural frequency

A

the frequency/vibration of an elastic object

14
Q

period

A

time required to complete 1 cycle/wave

15
Q

pitch

A

frequency of a sound wave

16
Q

rarefaction

A

thinning or decrease of gas pressure due to wave/vibration

17
Q

resonance

A

when the frequency of an external force matches the natural frequency of a material

18
Q

reverberation

A

apparent increase in volume caused by reflections

19
Q

sonic boom

A

sound waves that pile up when a source is traveling at or faster than the speed of sound

20
Q

standing waves

A

condition where 2 waves of equal frequency traveling in opposite directions meet and form nodes and antinodes

21
Q

Transverse waves

A

causes particles to move perpendicular to the direction of the wave

22
Q

ultrasonic

A

sound waves at frequencies too high to hear; above 20,000 Hz

23
Q

vibration

A

back and forth motion that repeats itself

24
Q

wavelength

A

horizontal distance between 2 crests or 2 troughs

25
Q

refraction

A

bending or change in direction of a wave due to different mediums or different conditions in same medium

26
Q

Constructive interference

A

2 waves interacting in which they add together

27
Q

Destructive interference

A

2 waves interacting in which they cancel each other out

28
Q

internal restoring force

A

ability of spring/elastic material to return to its original state

29
Q

simple harmonic motion

A

Back and forth motion until equilibrium is achieved

30
Q

crest

A

produced by condensations - high point of wave

31
Q

trough

A

produced by rarefactions - lowest point of wave

32
Q

lambda

A

wavelength