sound. what do you hear? did you ever wonder how you hear these things?

SOUND

What do you hear?

What do you hear?

DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?

WAVES

Transversal Waves

Crest

Longitudinal Waves

AMPLITUDE – Height of the waveThe higher the amplitude, the louder the sound

Frequency – Number of waves per second.High frequency, higher the pitch

SOUND WAVES

Must travel in a MEDIUM.

SPEED OF SOUND

SOUND TO THE EAR

How a trumpet works!

http://www.youtube.com/watch?v=olA3TrgnK7o&safety_mode=true&persist_safety_mode=1&safe=active

How a drum works!

http://www.youtube.com/watch?v=jR17iCbMMOA&safety_mode=true&persist_safety_mode=1&safe=active

How an electric guitar works!

http://www.youtube.com/watch?v=lBAZepM5F_0&safety_mode=true&persist_safety_mode=1&safe=active

How a cell phone works!

http://www.youtube.com/watch?v=xv9dRENgDoc&safety_mode=true&persist_safety_mode=1&safe=active

REVIEW

SOUND TRAVELS IN ___________

The higher the amplitude, the _________ the sound

The higher the frequency, the __________ the pitch

REVIEW

In what medium does sound travel fastest?

Solid, liquid or gas

Sound is usually measured in _________. Humans hear from _____ to ______ Htz

Label the parts of the waves

What did you learn today?