1. SOUND
A NOISY SUBJECT

2. SOUND
Compressional WAVES PRODUCED BY VIBRATING OBJECTS

3. CREATES A SERIES OF COMPRESSIONS AND RAREFACTIONS

5. SPREADS IN ALL DIRECTIONS

6. SPEED OF SOUND 346 m/s (760 mi/h)
MEDIUM-DEPENDS ON HOW WELL THE PARTICLES CAN TRANSMIT THE COMPRESSIONS AND RAREFACTIONS OF A SOUND WAVE

7. TEMPERATURE AND SPEED OF SOUND
HIGHER THE TEMPERATURE MORE MOLECULES COLLIDE MORE FREQUENTLY

8. INCREASE OF TEMPERATURE INCREASES SOUND SPEED

9. SOME SOLIDS DAMPEN VIBRATIONS
RUBBER IS A GOOD SOUND PROOFING MATERIAL

10. LOUDNESS OF SOUND DEPENDS PARTLY ON ENERGY CONTAINED IN SOUND WAVE
GREATER THE AMPLITUDE-THE LOUDER THE SOUND

11. DEPENDS ON THE DISTANCE FROM THE SOURCE
INTENSITY DESCRIBES ITS LOUDNESS AT A PARTICULAR DISTANCE FROM THE SOURCE

12. RELATIVE INTENSITY
COMPARES INTENSITY OF A SOUND WITH INTENSITY OF THE QUIETEST SOUND A PERSON CAN HEAR (THRESHOLD OF HEARING)

13. MEASURED IN DECIBELS (dB)
Near total silence - 0 dB
A whisper - 15 dB
Normal conversation - 60 dB
A lawnmower - 90 dB
A car horn dB
A rock concert or a jet engine dB
A gunshot or firecracker dB

14. PITCH
HOW HIGH OR LOW A NOTE SOUNDS

15. PITCH IS RELATED TO FREQUENCY
HIGH PITCH VIBRATES RAPIDLY (HIGH FREQUENCY)
LOW PITCH VIBRATES SLOWLY (LOW FREQUENCY)

17. WHAT WE CAN HEAR 20 Hz TO 20,000 Hz BELOW 20 Hz-INFRASOUND
ABOVE 20,000 Hz-ULTRASOUND

18. MUSICAL INSTRUMENTS USE STANDING WAVES TO PRODUCE SOUND
HAVE A CHARACTERISTIC SOUND QUALITY RESULTING FROM A MIXTURE OF HARMONICS

19. EXAMPLE:
FLUTE USES A COLUMN OF AIR
GUITAR-USES STRINGS

20. TUNING FORK
VIBRATES AT ITS FUNDAMENTAL FREQUENCY
PRODUCES A PURE TONE OF ONLY ONE PITCH

22. RESONANCE
SOUND IS AMPLIFIED BECAUSE THE VIBRATION OF THE SOUND CAUSES THE OBJECT TO VIBRATE ALSO