1. THE MATERIALS OF MUSIC: SOUND AND TIME

2. WHAT IS SOUND? The sensation perceived by the organ of hearing (ear) when vibrations (sound waves) reach the ear

3. VIBRATION Periodic motion of a substance Instruments: strings, sounding boards, etc. AND the air inside and around the instrument vibrate

4. COMPRESSION AND RAREFACTION -Happens when you activate the sound source

5. FREQUENCY Refers to the number of compression-rarefaction cycles that occur per second Human range: 20 to 20,000 cycles per second Video https://www.youtube.com/watch?v=zKwpv8mZHRM

6. FOUR PROPERTIES OF SOUND Pitch – how high or low a sound is Intensity – how loud or soft a sound is Duration – how long or short a sound is Timbre – quality or color of a sound

7. PITCH The greater the number of sound waves, the higher the pitch TONE – a musical sound of definite pitch

8. INTENSITY (DYMANICS)

9. DURATION (METER AND RHYTHM) METER = Regularly recurring pulses of equal duration (STEADY BEAT) FORMS MEASURES DUPLE = Two-beat TRIPLE = Three-beat RHYTHM = Patterns of uneven durations Can be almost any length

10. TIMBRE Permits us to distinguish between a clarinet and an oboe, for instance http://www.musictechteacher.com/music_quizzes/aq_identify_th e_instrument_sounds/quiz.html http://www.musictechteacher.com/music_quizzes/aq_identify_th e_instrument_sounds/quiz.html