Amplitude
Frequency
Amplitude & Frequency
Sound in the real world
Sound Science
100
Does amplitude tell us how loud a sound is or how high its pitch is?
How loud it is
100
Does frequency tell us about a sound's pitch or volume?
pitch
100
What controls volume: amplitude or frequency?
amplitude
100
What part of a guitar makes vibrations to produce sound?
strings
100
Sound is created by things that _______.
vibrate
200
Which sound has a bigger amplitude: a whisper or a shout?
shout
200
Which sound usually has a higher frequency: a bird chirping or a lion roaring?
a bird chirping
200
What controls pitch: amplitude or frequency?
frequency
200
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You turn up the volume on a speaker. Does the amplitude or frequency increase?
amplitude
200
Can sound travel through air, water, or both?
both
300
A sound wave has very small vibrations. Is the sound loud or quiet?
quiet
300
A sound has a low frequency. Does it have a high pitch or a low pitch?
low pitch
300
A sound becomes louder, but its pitch stays the same. What changes: amplitude, frequency, or both?
Amplitude only
300
A mosquito makes a high-pitched buzzing sound. Are its vibrations fast or slow?
fast
300
Can sound travel through space?
No
400
Which wave has the greater amplitude?
A
400
Which wave has the higher frequency?
A
400
Which wave is louder? Which has a higher pitch?
Wave B is louder.
Wave A has a higher pitch.
400
A person plays two notes on a piano. One is high-pitched and one is low-pitched. Which note has the higher frequency?
The high-pitched note
400
A bell rings inside a closed container. The air is slowly removed. Why does the bell become harder to hear?
Sound needs a medium, such as air, to travel. If there is no air, the sound can not travel.
500
A student hits a drum harder. What happens to the amplitude of the sound wave? Explain.
Amplitude increases because the vibrations are larger.
500
A guitar string vibrates faster. What happens to the frequency and pitch of the sound?
Both frequency and pitch increase.
500
A sound changes from soft and low-pitched to loud and high-pitched. Describe what happens to its amplitude and frequency.
Both amplitude and frequency increase.
500
A singer sings the same note, first quietly and then loudly. What happens to the amplitude and frequency?
Amplitude increases and frequency stays the same.
500
Explain how sound travels from a vibrating guitar string to your ear.
The string vibrates. This makes the air particles vibrate. The air particles bump against each other through the air. The air particles vibrate against the ear.
