wave interactions
What is reflection?
When sound waves bounce off a surface
What is a medium?
Material that sound travels through
What is one factor that affects sound speed?
Stiffness
What is loudness?
Awareness of the energy of a sound
What is transmission?
When sound waves pass through a surface
How do hard surfaces affect sound?
Reflect most of the sound waves
Does sound travel faster in solids or gases?
Solids
What is pitch?
How high/low a sound seems
What is absorption?
When sound waves lose energy and is converted to thermal energy
How do soft surfaces affect sound?
Absorb more sound waves
How does stiffness affect sound speed?
Greater stiffness makes sound travel faster
What increases loudness in a sound wave?
Greater amplitude increases loudness
What is diffraction?
When sound waves bend around openings/edges
Why can sound travel between rooms?
Diffracts through openings like doorways
How does density affect sound speed?
Greater density makes sound travel slower (if stiffness is the same)
What determines pitch in a sound wave?
Frequency determines pitch
Why do porous materials absorb more sound?
They have small holes that trap/reduce the sound energy
How does the medium change sound behavior?
Determines how much sound is reflected, absorbed, transmitted, or diffracted.
How does temperature affect sound speed in different materials?
In air, higher temps increase sound speed, but in solids, higher temperature decrease sound speed
How does the Doppler effect change pitch?
Changes frequency as the sound source moves toward/away from observer