Sound Basics
What causes sound to be made?
Vibrations
How does sound travel?
In waves
High and low
What part of the ear collects sound waves?
The outer ear
Name one animal that uses echolocation.
Examples: bats, whales, dolphins, birds
What are the mediums sound travels through?
Solids, liquids and gasses
What is the distance between two wave peaks in a sound wave?
Wavelength
How do we measure volume?
Decibels
What are the hammer, anvil and stirrup?
Bones in the ear that help transmit sound
Name an instrument that uses a vibrating string to make sound.
Examples: guitar, violin, harp
Can sound travel through space? Why or why not?
No, because there is no air for the sound waves to travel through.
What is the frequency of sound?
How fast the sound waves move
If a string is tighter, does it make a higher or lower pitch?
Higher
How are sound vibrations transformed into electrical signals?
By tiny hairs that send signals to the brain
Name one way to protect your hears from loud sounds.
Wear earplugs or stay away from loud noises
What happens to sound waves in a vacuum?
They can not travel because there is no matter to carry them.
Through what matter does sound travel the fastest?
Air
How does an object's size affect it's pitch
Larger = lower pitch
Smaller = higher pitch
Sounds above this decibel generally cause ear pain.
120 decibels
What sound technology is used to explore the ocean by sending sound waves and measuring their echos?
Sonar
What is acoustics?
The study of sound.
What is the approximate speed of sound in feet per seconds?
1,100 feet per second
What is the range of pitch human ears can hear in Hz?
20 Hz to 20,000 Hz
What causes hearing loss?
Damage to the hair cells or exposure to loud sounds
What is the Doppler effect?
How the pitch change when a sound source moves