6 th  Grade Science  Chapter 19  Sound Notes Section 19.2 Bottle Nose Dolphins
<ul><li>What is music and noise? </li></ul><ul><li>Music is sound that is deliberately produced in regular patterns. Noise...
What is music? <ul><li>The sounds that make up music usually have a regular pattern of pitches, or notes. </li></ul><ul><l...
Types of music- Rock, Jazz, country, classical
The Tacoma Narrows Bridge collapsed because of the wind creating a self induced natural frequency
<ul><li>What is a fundamental frequency? </li></ul><ul><li>The lowest frequency produced by a vibrating object is its fund...
Fundamental Frequency <ul><li>When a tuning fork is struck it vibrates. </li></ul><ul><li>This vibration is the fundamenta...
Overtones <ul><li>These higher frequencies are called  overtones . </li></ul><ul><li>Overtones have frequencies that are m...
<ul><li>How are sounds produced in stringed instruments? </li></ul><ul><li>Stringed instruments produce sounds by vibratin...
Resonance <ul><li>Resonance  occurs when an object is made to vibrate at its natural frequencies by absorbing energy from ...
Amplifying Vibrations <ul><li>The sound produced by a vibrating string usually is soft.   </li></ul><ul><li>To amplify the...
The acoustic guitar uses the body of the guitar as a sound resonator. The electric guitar uses a electric amplifier as a s...
Percussion instruments produce sounds by vibrating when they are struck. Phil Collins- Genesis, Ringo Star- Beatles, Neil ...
Percussion <ul><li>Percussion instruments are struck to make a sound. </li></ul><ul><li>Striking the top surface of the dr...
<ul><li>How do brass and woodwind instruments produce sound? </li></ul><ul><li>Brass and woodwind instruments produce soun...
Musical Scales <ul><li>A musical scale is a sequence of notes with certain frequencies. </li></ul><ul><li>The frequency pr...
Brass and Woodwinds <ul><li>To make music from these instruments, the air in the pipes is made to vibrate at various frequ...
Beats Help Tune Instruments <ul><li>A piano tuner might hit a tuning fork and then the corresponding key on the piano. </l...
The Ear
<ul><li>Describe how music and noise are different. </li></ul><ul><li>Two bars on a xylophone are 10 cm long and 14 cm lon...
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Sect 19.2

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Sect 19.2

  1. 1. 6 th Grade Science Chapter 19 Sound Notes Section 19.2 Bottle Nose Dolphins
  2. 2. <ul><li>What is music and noise? </li></ul><ul><li>Music is sound that is deliberately produced in regular patterns. Noise is sound without a pattern. </li></ul><ul><li>What is a natural frequency? </li></ul><ul><li>Every object will vibrate at certain frequencies called natural frequencies. </li></ul>Key Questions 1
  3. 3. What is music? <ul><li>The sounds that make up music usually have a regular pattern of pitches, or notes. </li></ul><ul><li>Noise is usually a group of sounds with no regular pattern. </li></ul>
  4. 4. Types of music- Rock, Jazz, country, classical
  5. 5. The Tacoma Narrows Bridge collapsed because of the wind creating a self induced natural frequency
  6. 6. <ul><li>What is a fundamental frequency? </li></ul><ul><li>The lowest frequency produced by a vibrating object is its fundamental frequency. </li></ul><ul><li>What are overtones? </li></ul><ul><li>The overtones produced by a vibrating object are multiples of the fundamental frequencies. </li></ul>Key Questions 2 The Tadpole Galaxy
  7. 7. Fundamental Frequency <ul><li>When a tuning fork is struck it vibrates. </li></ul><ul><li>This vibration is the fundamental frequency of the tuning fork. As the tuning fork changes in size, so does its fundamental frequency. </li></ul>
  8. 8. Overtones <ul><li>These higher frequencies are called overtones . </li></ul><ul><li>Overtones have frequencies that are multiples of the fundamental frequency. </li></ul><ul><li>The number and intensity of the overtones produced by each instrument are different and give instruments their distinctive sound quality. </li></ul>
  9. 9. <ul><li>How are sounds produced in stringed instruments? </li></ul><ul><li>Stringed instruments produce sounds by vibrating strings that are amplified by a resonator. </li></ul><ul><li>How are sounds produced in a percussion instrument? </li></ul><ul><li>Percussion instruments produce sounds by vibrating when they are struck. </li></ul>Key Questions 3 The Sombrero Galaxy
  10. 10. Resonance <ul><li>Resonance occurs when an object is made to vibrate at its natural frequencies by absorbing energy from a sound wave or another object vibrating at these frequencies. </li></ul><ul><li>Musical instruments use resonance to amplify their sounds. </li></ul>
  11. 11. Amplifying Vibrations <ul><li>The sound produced by a vibrating string usually is soft. </li></ul><ul><li>To amplify the sound, stringed instruments usually have a hollow chamber, or box, called a resonator, which contains air. </li></ul>
  12. 12. The acoustic guitar uses the body of the guitar as a sound resonator. The electric guitar uses a electric amplifier as a sound resonator.
  13. 13. Percussion instruments produce sounds by vibrating when they are struck. Phil Collins- Genesis, Ringo Star- Beatles, Neil Peart- Rush, Rick Allen- Def Leppard
  14. 14. Percussion <ul><li>Percussion instruments are struck to make a sound. </li></ul><ul><li>Striking the top surface of the drum causes it to vibrate. </li></ul><ul><li>The vibrating drumhead is attached to a chamber that resonates and amplifies the sound. </li></ul>
  15. 15. <ul><li>How do brass and woodwind instruments produce sound? </li></ul><ul><li>Brass and woodwind instruments produce sounds by vibrating a column of air. </li></ul><ul><li>What does the human ear do? </li></ul><ul><li>The outer ear collects sound, the middle ear amplifies sound, and the inner ear changes the sound to nerve impulses. </li></ul>Key Questions 4
  16. 16. Musical Scales <ul><li>A musical scale is a sequence of notes with certain frequencies. </li></ul><ul><li>The frequency produced by the instrument doubles after eight successive notes of the scale are played. </li></ul>
  17. 17. Brass and Woodwinds <ul><li>To make music from these instruments, the air in the pipes is made to vibrate at various frequencies. </li></ul><ul><li>A musician playing a brass instrument, </li></ul>such as a trumpet, makes the air column vibrate by vibrating the lips and blowing into the mouthpiece.
  18. 18. Beats Help Tune Instruments <ul><li>A piano tuner might hit a tuning fork and then the corresponding key on the piano. </li></ul><ul><li>Beats are heard when the difference in pitch is small. </li></ul><ul><li>The piano string is tuned properly when the beats disappear. </li></ul>
  19. 19. The Ear
  20. 20. <ul><li>Describe how music and noise are different. </li></ul><ul><li>Two bars on a xylophone are 10 cm long and 14 cm long. Identify which bar produces a lower pitch when struck and explain why. </li></ul><ul><li>Describe the parts of the human ear and the function of each part in enabling you to hear sound. </li></ul><ul><li>Predict how the sound produced by a guitar string changes as the length is made shorter. </li></ul><ul><li>Diagram the fundamental and the first two overtones for a vibrating string. </li></ul>Questions Section 19.2

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