wave interactions
What is reflection?
What is a medium?
Material that sound travels through
What is one factor that affects sound speed?
Stiffness, density, temperature
What is loudness?
awareness of the energy of a sound
What is transmission?
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 or low a sound seems
What is absorption?
Sound waves lose energy and then converted to thermal energy
How do soft surfaces affect sound?
Absorb most of the sound waves
How does stiffness affect sound speed?
Greater stiffness: sound travel faster
What increases loudness in a sound wave?
Greater amplitude
What is diffraction?
Sound waves bend around openings/edges
Why can sound travel across rooms?
Diffracts through openings like doorways
How does the density affect sound speed?
Greater density: sound travel slower (if stiffness is the same)
What determines pitch in a sound wave?
Frequency
Why do porous materials absorb more sound?
have small holes that trap/reduce sound energy
How does the medium change sound behavior?
Determines how much sound is reflected, absorbed, transmitted, or diffracted
How does temp affect sound speed in different materials?
In air, higher temps increase sound speed, but in solids, higher temps decrease sound speed
How does the Doppler effect change pitch?
Frequency changes as an object moves toward or away from the observer