Sound Waves
This sound wave is represented by lines, dots, or circles.
What is a longitudinal wave?
As frequency increase, this sounds higher.
What is pitch?
The speed of sound in air at 20°C.
What is 340 m/s?
A tube leading from the pinna to the ear drum.
What is the ear canal?
The height of a wave from the centreline to the crest or trough.
What is amplitude?
In this wave type, particles move perpendicular to the direction of the wave.
What is a transverse wave?
The unit of measurement for how many waves pass a point in 1 second.
What is Hertz (Hz)?
Materials like curtains and carpets do this to sound waves, reducing the possibility of an echo.
What is absorption?
Vibrates in response to sound waves.
What is the ear drum?
Used by bats to find their food.
What is echolocation?
Sound waves cannot travel through this.
What is a vacuum?
How people perceive the frequency of a sound.
What is Pitch?
Must be done when calculating the distance of an echo from a source.
What is divide by 2?
Amplifies and transmits vibrations from the ear drum to the inner ear. The smallest bones in the body.
What are the ossicles?
Done to guitar strings to increase pitch.
What is tightening?
The part of a sound wave in which the particles are compressed.
What is a peak (crest)?
The level of sound people can only JUST hear.
What is 0 dB?
The change in frequency or wavelength of a wave in relation to an observer who is moving relative to the source of the wave.
What is the Doppler effect?
How electrical signals get to your brain so you can hear.
What is the auditory nerve?
What is ultrasound?
The part of a transverse sound wave with rarefaction.
What is a trough (valley)?
Named for the Canadian inventor of the telephone, Alexander G. Bell.
What is the decibel?
When the source of a sound moves towards the observer, the sound will increase in frequency due to this.
What is wave compression?
Fluid filled structures in your ear, the first sends nerve impulses to the brain and the second is essential for balance.
What are the cochlea and semi-circular canals?
The level of sound that causes hearing damage after prolonged exposure.
85 dB