VOCAB
unit is Hz
frequency
the human perception of the frequency of sound
pitch
Sound waves cause this part of the ear to vibrate
Ear Drum
Sound waves produced by a vibrating object are called ?
compressional waves
What some waves need in order for energy to be transfered
A medium
the maximum distance particles in a wave travel from their resting place
Aplitude
the distance between one point on a wave and the nearest point moving with the same speed and direction
wavelength
Vibrations are transferred to the the hammer, the anvil and the ________
Stirrup
These waves have crests and troughs
Transverse Waves
What year was Firestone founded?
1908
the number of wavelengths that pass by a point each second
frequency
Type of interference in which the resulting wave is larger than either of the waves that created it.
Constructive Interference
The hair cells of the ear are located where?
Cochlea of the inner ear
These waves have compressions and rarefactions
Longitudinal waves
Mr. Carnahan has visited four countries outside of the United States. 300 for each one you get right (max of 4 guesses)
Canada
UK
Netherlands
Australia
the ability of an object to vibrate by absorbing energy at its natural frequency
Resonance
waves with no pattern or deliberate pitch
Noise
The part of the ear that can be permanently damaged by high decibel sound or sounds over 85 dB that accumulate over time
Hair cells in the cochlea
If the frequency of a sound wave is 7.0 Hz, and the sound wave travels through the air at a speed of 350 m/s, what is the wavelength?
50 m
If you took the total number of 7th graders (400 points) and subtracted the total number of 8th graders (400 points), what number would result? (400 point)
49 7th
52 8th
3
Wave type where particles in matter to move back and forth along the same direction in which the wave travels. Sounds waves are an example.
Longitudinal
waves that can travel through matter or empty space
Electromagnetic waves
The process of detecting objects by bouncing sounds off them is called?
echolocation
The more energy that the wave shown in this figure carries, the greater is its
Amplitude
The relationship between the frequency of a wave and it’s speed is
a. inversely proportional
b. directly proportional
c. both direct and inversely proportional
d. none of the above
B