Vocab
This is how high or low a sound is.
What is pitch?
This is the distance measured from a point on one wave to the same point on the next one.
What is wavelength?
This is the part of the ear that funnels sound waves into your ear.
What is the outer ear?
Sound waves reflecting back in the same pattern.
What is an echo?
Why do different string instruments sound different if the strings are made off the same materials?
The strings are different lengths, thickness, and tightness.
A quick back and forth motion.
What is vibration?
To discover a sound's volume you measure this.
What is amplitude?
What is the brain?
This is the instrument used to measure sound waves.
What is an oscilloscope?
Someone is talking to you but you can't hear them. What are three strategies to hear them better.
1. Shout to them to speak louder. 2. Move closer to them. 3. Use your hand to great a bigger funnel for your ear.
A wave bouncing off a surface is called this.
What is a reflection?
How many waves that pass in a second.
What is frequency?
This is where vibrations change to electric nerve signals.
What is the cochlea?
Sound waves need this to travel.
What is a medium?
How could you test which materials absorb the most sounds?
Measure a consistent sound with an oscilloscope. Then cover the oscilloscope's microphone with different materials. Measure how much energy is lost for each material.
When a sound wave is stopped from bouncing off or moving through something.
What is absorption?
How high pitch waves look.
What are waves with peaks (crests) close together?
This is the first part of the ear to vibrate.
What is the eardrum?
This is a wave where the disturbance is perpendicular (90°) from the direction the energy moves.
What is a transverse wave?
Play the same sound, at the same volume, from the same place against different materials as backgrounds.
This is a sound that continues moving through an object.
What is transmission?
This is the unit commonly used to measure sound.
What is the decibel?
These are three smallest bones in the body, located in the inner ear.
What are the hammer, anvil, and stirrup?
This is a wave where the disturbance moves parallel (same direction) that the energy moves.
What is a longitudinal wave?
You turn on a machine and it begins to vibrate. As the machine comes to full power its pitch continues to rise. Why?
As the machine moves faster and faster the vibrations are getting faster and faster.