Sound Facts
____ objects vibrate when they make sound.
All
The maximum distance the particles in a wave move from their rest position.
What is amplitude?
As the loudness of a sound increases, what will increase about the sound wave?
Amplitude
The speed of sound changes when the temperature changes. Does sound travel faster in warmer or colder air?
What is warmer air?
The term used to describe the change in frequency of a wave relative to an observer moving relative to the source of the wave.
What is the Doppler Effect?
Sound waves _____ transfer matter
Do not
What is pitch?
particles vibrating back and forth faster or slower to make a sound
When the frequency increase what happens to the pitch?
it increases
If two sounds have the same amplitude but different frequencies, what aspect of the sound is different?
What is pitch?
Whales and dolphins use this method, similar to sonar, to navigate and find prey.
What is echolocation?
Frequency
This term describes how loud or soft a sound is.
What is volume or amplitude?
Which waves carry the most energy?
High Amplitude
What are the three main parts of the ear?
outer ear, middle ear, and inner ear
This type of wave can break up kidney stones without surgery.
What is a shock wave?
To change the pitch of the sound a musician plays, she presses down on the strings on the neck of a guitar. By moving her finger to different positions on the same string, what is she changing?
Frequency
The unit used to measure the loudness of a sound.
What are decibels (dB)?
The speed of a sound wave varies as it travels through different states of matter. In which state of matter does sound travel the fastest? and WHY?
Solid, (Answers vary something about particles being close together so they can bounce off)
What is the ossicles job?
The ossicles are three tiny bones in the middle ear that transmit and amplify sound vibrations from the outer ear to the inner ear
When a sound source moves toward you, does the pitch appear higher or lower?
What is higher?
What is the relationship between frequency and wavelength?
The higher the frequency, the shorter the wavelength
This occurs when a sound wave bounces off a surface and returns to the listener.
What is an echo?
Write a claim about how the frequency of a sound wave is related to the energy is carries
High frequency sound waves carry more energy than low frequency sound waves.
What happens in the cochlea
hair cells in the cochlea transform the fluid wave into electrical signals that travel to the brain which detects different frequencies
This effect explains why an ambulance siren changes pitch as it passes by.
What is the Doppler Effect?