Sound Waves 1
What is the source of all sound?
Vibrations
What does amplitude measure in a sound wave?
Loudness/volume
How does a ukulele produce sound?
The strings are plucked and they vibrate.
What part of the body vibrates when we speak or sing?
Vocal Cords
What unit is used to measure pitch?
Hertz (Hz)
What does frequency determine in a sound wave?
Pitch
What does it mean when a sound wave has a low frequency?
The pitch is lower
How does a straw kazoo produce sound?
The straw tips vibrate against eachother.
What happens to vocal cords when a singer sings a high note?
They vibrate faster
What unit is used to measure loudness?
Decibels (dB)
What happens to a sound wave when the amplitude increases?
It gets louder
What happens to sound when frequency increases?
It gets higher
How does a trumpet produce sound?
Lips vibrate into the trumpet.
What is the scientific term for how high or low someone can sing?
Range
Which animal can hear higher frequencies, a dog or a chicken?
A dog
How does the length of a sound wave affect its pitch?
Longer sound waves create lower pitches, and shorter sound waves create higher pitches
Draw a sound wave with high frequency
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What happens to the pitch when you tighten the strings of a ukulele?
The pitch goes up.
Why do men and women often have different vocal ranges?
Men’s vocal cords are typically thicker and longer, producing lower sounds
What frequency range can humans typically hear? (
20-20,000hz
Draw a high-pitch, low-volume sound wave.
(A wave with close-together peaks and small amplitude)
Draw a loud, low pitch sound wave.
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Why do larger instruments usually produce lower sounds?
Longer/larger instruments have longer sound waves, which lower the frequency
Where does your voice come from in your body?
The larynx
Estimate the frequency. The team that is closest gets the points.
3,583hz