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Musical Instruments Contents: What is the difference between high and low notes? Why do different instruments sound diff

Musical Instruments Contents: What is the difference between high and low notes? Why do different instruments sound different? What does it mean to play out-of-tune?. What is Pitch?. SIM – Pitch/Beat Freq. SIM – Pitch/Beating Freq.

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Musical Instruments Contents: What is the difference between high and low notes? Why do different instruments sound diff

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  1. Musical Instruments • Contents: • What is the difference between high and low notes? • Why do different instruments sound different? • What does it mean to play out-of-tune?

  2. What is Pitch? SIM – Pitch/Beat Freq SIM – Pitch/Beating Freq

  3. Pitch depends on length!Which trombone has the longer wavelength? Higher pitch?AB www.physicsclassroom.com Do nodes or antinodes appear at the mouthpiece? Bell?

  4. Tillery, Physical Science Do nodes or antinodes appear at the open ends of these pipes? Which pipes produce the longer wavelength? Which pipes produce higher pitch?

  5. Musical instruments create vibrations of the air to produce pitches. Wind instruments vibrate the air with either a reed or a musician’s buzzing lips. String instruments vibrate the air with a metal or plastic string. SIM – Open/Closed Pipe SIM – Both ends fixed Trumpet Tuba Flute Sax Clarinet Oboe Trombone Guitar Piano Violin Viola Harpsichord SIM – both ends open SIM – 1 end open and 1 end fixed

  6. The Soundry available at: http://library.thinkquest.org/19537/ Harmonics - the frequencies that are multiples of a wave’s fundamental frequency. Ex: if the fundamental frequency is 440 Hz, the harmonics are 880 Hz, 1320 Hz, etc. Timbre - a musical instrument’s unique sound. Ex: a clarinet doesn’t sound like a trumpet because it has a different timbre. An instrument's timbre is due to the relative intensities of harmonics present in it’s tone.

  7. Harmonic Series 1st 4th 2nd 5th 3rd www.physicsclassroom.com

  8. Along with the 1st harmonic, a wave from a CLARINET has lots of the 3rd, 5th, and 7th harmonics, while only a little of the 2nd, 4th, and 6th harmonics. Along with the 1st harmonic, a wave from a TRUMPET has lots of the 3rd, while only a little of the 2nd, 4th, and 5th harmonics. SIM – Composite Wave The Soundry available at: http://library.thinkquest.org/19537/

  9. Tillery, Physical Science When two instruments are each playing a slightly different pitch they sound out of tune. (SIM1) (SIM2) Beating Frequency – the wavering sound heard when two slightly different pitches are played together Beating Frequency = f1 - f2

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