Vocab 1
Vibrations of solids, liquids, and gasses.
Sound
The number of times a vibration occurs every second.
Frequency
If a sound wave is traveling at a speed of 340 m/s, what medium is it most likely traveling through?
Air
A sound wave has a frequency of 1700 Hz and a wavelength of 0.2m. What is its speed?
340 m/s
The sensitive cone-shaped piece of the ear that vibrates when sound hit it; the part of the ear that vibrates at the same frequency as the sound wave
Eardrum
A wave that forms from a vibrating object; wave that does not travel through space
Standing Wave
The frequency of a sound; the quality that determines how high or low a sound is
Pitch
If a sound wave is traveling at a speed of 1,500 m/s, what medium is it most likely traveling through?
A Liquid
A sound wave has a wavelength of 0.77m and is travelling at a speed of 340 m/s. What is the frequency of the sound wave?
441.6 Hz
Three small bones in the ear that as a group are called the “ossicles”; they pass vibrations to the cochlea
Hammer, Anvil, and Stirrup
The movement created by a standing wave
Pressure Wave
The loudness or strength of a sound; height of a sound wave
Amplitude
If a sound wave is traveling at a speed of 5,120 m/s, what medium is it most likely traveling through?
A solid
A sound wave travels with a speed of 340 m/s and has a frequency of 750 Hz. What is its wavelength?
0.45 m
Spiral shaped part of the ear that contains thousands of hair cells; the bottom of the spiral picks up high pitch sounds and the top of the spiral picks up low pitch sounds
Cochlea
The length of a complete standing wave from beginning node to ending node; a full cycle of a wave
Wavelength
The point along a standing wave where there is minimum amplitude; beginning and end of a wave
Node
Why does sound travel slower in air than in water or solid object?
The molecules in air and water are more spread out compared to solids. Sound is transferred from molecule to molecule. If there is more space between molecules, it takes longer for the sound to transfer.
List the units for the following:
Frequency
Wavelength
Amplitude
Speed of Sound
Frequency - Hertz (Hz)
Wavelength - Meters (m)
Amplitude - Decibels (dB)
Speed of Sound - Meters per Second (m/s)
The hair cells in the cochlea stimulate the nerve cells that send signals to the brain; this part of the ear sends those signals.
Auditory Nerve
Position of maximum displacement on a sound wave; top is a crest, bottom is a trough
Antinode
What is the difference between amplitude and frequency?
Amplitude is the height of a sound wave and frequency is cycles per second
The __ of a sound wave is NOT affected by the type of medium, but the __ of a sound wave IS affected by the type of medium.
The Frequency of a sound wave is NOT affected by the type of medium, but the Wavelength of a sound wave IS affected by the type of medium.
What is the relationship between the following:
Frequency & Wavelength
Wavelength & Amplitude
Frequency & Pitch
Inverse relationship - when one increases, the other decreases
There is no relationship
When one is high, so is the other and vice versa
The whole human ear is divided into three major parts. What are they?
Outer Ear, Middle Ear, and Inner Ear