Physics Sound Wave Quiz
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45 Terms
Compared to the speed of light, sound travels…
Slower
Sound waves are produced by…
Vibrating objects
Sound waves are a series of…
High and low pressure regions, periodic condensations and rarefactions, and periodic disturbances
A sound wave is a ___ wave
Longitudinal
Sound waves cannot travel in a …
Vacuum
Sound waves travel faster if the air is…
Warmer
Noise canceling headphones are an example of…
Destructive interference
The phenomenon of beat interference results from…
Sound interference
A 680 Hz sound wave travels at 340 m/s, the wavelength is…
.5 meters
If a rarefaction hits a compression…
Almost nothing is heard due to destructive interference
At the speed of sound, to get a wavelength of 5, you need a frequency of…
68 Hz
If you can hear a beat frequency of 4 beats/sec, and one of the notes sounded is 369 Hz, the possible other one is…
365 Hz or 373 Hz
The pitch of sound is determined by…
Frequency
The highest frequency heard by normal humans is…
20,000 Hz
___ would be most likely to transmit sound with the highest speed
Steel
Sound travels fastest in …
Solids
If the natural frequency is one rep every 4 seconds, you should apply a vibration … (at max)
Every 4 seconds
A tuning fork of 440 Hz will not be forced into vibration by a sound of…
880 Hz
Define pitch
Pitch is our subjective frequency
Sound waves with frequencies below normal range are…
Infrasonic
True or false? Sound vibrates the air
False
It is not the ___ that travels, but the ___
Medium, pulse
When a tuning fork is struck against an open tube…
It sends a series of compressions and rarefactions
Sound travels ___ and ___ through metal than air
Louder, faster
The speed of sound in gas depends on ___ and ___
Temperature, mass of particles
Lighter gas particles travel ___ in heavier gases
Faster
The intensity of sound is proportional to…
The square of the amplitude of a wave
Natural frequency depends on…
Elasticity and shape
Larger surfaces…
Set more air in motion
Define forced vibration
A vibration set in motion by another
___ corresponds to the crest of a wave
Compressions
___ corresponds to the trough of the wave
Rarefactions
___ aids noise canceling technology
Destructive interference
In a visual representation, you see compressions as …
Darker or compressed particles
In a visual representation, you see rarefactions as…
Lighter or spread out particles
To calculate the difference…
Difference in dB/10 ^10
Resonance occurs when…
An object is forced to vibrate at its natural frequency
A singer shattering crystal is an example of…
Resonance
If an explosion occurs 340 km away, and sound travels at 340 m/s, it will take ___ to reach you
1000 seconds
Compared to 10 dB, 50 dB has _____ times more intensity
10,000
Suppose you sound a tuning fork at the same time you hit a 1053 Hz note on a piano and hear 3 beats/sec. You tighten the piano string slightly and now hear 4 beats/sec. The frequency of the tuning fork is ___
1050 Hz
Mosquito buzz = 40 dB, Normal conversation = 60 dB. Normal conversation is ___ times more intense
100
For 100 dB to match the intensity of 130 dB, it would need to be multiplied …
1000 times
110 dB is ____ more intense than 70 Hz
10,000
If an ocean scan signal returns at 5 seconds and the speed of sound is 1530 m/s, the signal is ____ deep
3825 m (1530×5)/2