1. CHARACTERISTICS OF SOUND
LOUDNESS
PITCH
QUALITY

2. LOUDNESS
IT IS THE CHARACTERISTIC BY WHICH YOU CAN DISTINGUISH A LOUD SOUND FROM A FAINT ONE

3. LOUDNESS DEPENDS ON
DIRECTLY PROPORTIONAL TO THE SQUARE OF AMPLITUDE
INVERSELY PROPORTIONAL TO THE SQUARE OF DISTANCE FROM THE SOURCE
SURFACE AREA OF THE VIBRATING BODY
DENSITY OF THE MEDIUM

4. INTENSITY: AMOUNT OF SOUND ENERGY PASSING THROUGH AN UNIT AREA
DEPENDS ON
SQUARE OF AMPLITUDE OF VIBRATIONS
SQUARE OF FREQUENCY OF VIBRATIONS
DENSITY OF AIR
VELOCITY OF SOUND IN AIR