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The Sound Of Music: Exploring the Nature, Properties, and Effects of Sound Waves

This video provides an in-depth look at the nature of sound waves, their properties like pitch and amplitude, and the fascinating Doppler Effect. It also explores the world of music, examining how notes combine to create patterns and the role of resonance in musical instruments.

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The Sound Of Music: Exploring the Nature, Properties, and Effects of Sound Waves

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Presentation Transcript

  1. SOUND

  2. The Sound Of Music?https://www.youtube.com/watch?v=BArpqYspIgU

  3. Standard and Essential Questions: • S8P4f: Diagram the parts of the wave and explain how the parts are affected by changes in amplitude and pitch • What are the distinguishing factors of sound waves? • How does the manipulation of a wave affect its performance?

  4. The Nature of Sound – Section 1 • Sound is a disturbance that travels through a medium as a longitudinal wave. • Sound begins with a vibration and the vibrations create compressions and rarefactions that travel as longitudinal waves • Sound waves carry energy through a medium without the particles traveling along. • https://www.youtube.com/watch?v=Ude8pPjawKI

  5. A common medium for sound is air, but it can also travel through liquids and solids. • Sound waves reflect off objects, diffract through narrow openings and around barriers, and interfere with each other. • Sometimes sound waves reflect and we call it an echo. • Sound waves can bend around corners and through openings.

  6. The speed of sound depends on the elasticity, density, and temperature of the medium. • The ability of a material to bounce back after being disturbed is called elasticity – sound travels quickly in mediums with high elasticity because they are compressed and quickly spread out again. • Sound travels slowly in more dense mediums. • BILL NYE: SOUND https://www.youtube.com/watch?v=lTetdgpu7MU

  7. http://dev.physicslab.org/Document.aspx?doctype=3&filename=WavesSound_IntroSound.xmlhttp://dev.physicslab.org/Document.aspx?doctype=3&filename=WavesSound_IntroSound.xml • https://www.youtube.com/watch?v=INqfM1kdfUc • https://www.youtube.com/watch?v=TKF6nFzpHBU&list=RDTKF6nFzpHBU#t=4 • https://www.youtube.com/watch?v=wvJAgrUBF4w • https://www.youtube.com/watch?v=9L9AOPxhZwY

  8. Properties of Sound – Section 2 • Loudness describes your perception of the energy of a sound ~ “Perception is reality” • The loudness of a sound depends on two factors: the amount of energy it takes to make the sound and the distance from the source of the sound. • In other words, the greater the energy used to make the wave, the louder it is. • The larger the amplitude the louder the sound. • The amount of energy a sound carries per second through an area is called its intensity. • The loudness compared to other sounds uses the units decibel (dB).

  9. The pitch is a description of how high or low the sound is. • The pitch you hear depends on the frequency of the wave. • High frequency = high pitch (TV on but volume off, dog whistle) • Low frequency – low pitch (bass) • Sound waves with frequencies above the normal human range of hearing are called ultrasound. • Sounds below the human range are called infrasound. • Music uses specific pitches called notes.

  10. Properties of Sound

  11. Properties of Sound • The range of human hearing is between 20 Hz and 20,000 Hz. • Above this range is called ultrasound. • Below this range is called infrasound. • Many other animals have a much higher and/or lower range.

  12. How young are your ears? http://www.freemosquitoringtones.org/

  13. https://www.youtube.com/watch?v=A-IoYWONKi4&edufilter=ITEV1GgfY7rUuGxSyy0SAhttps://www.youtube.com/watch?v=A-IoYWONKi4&edufilter=ITEV1GgfY7rUuGxSyy0SA – Blind Man using echolocation

  14. Elephant Infrasound • http://www.elephantvoices.org/elephant-communication/acoustic-communication.html • http://www.elephantvoices.org/multimedia-resources/elephant-call-types-database/173-laryngeal-calls/rumble/883-rumble-c2312431.html • http://www.elephantvoices.org/multimedia-resources/elephant-call-types-database/173-laryngeal-calls/rumble/884-rumble-a3203413.html?layout=calltypes • http://www.elephantvoices.org/multimedia-resources/elephant-call-types-database/176-laryngeal-calls/roar.html?layout=calltypes • http://www.elephantvoices.org/multimedia-resources/elephant-call-types-database/182-trunk-calls/trumpet.html?layout=calltypes

  15. Look at human voice Koshik and infrasound • https://www.youtube.com/watch?v=jih5c-F7TBo • http://www.livescience.com/24458-elephant-speaks-korean-out-loud.html • Man with the lowest voice in the world • https://www.youtube.com/watch?v=e46CghZ1XF0

  16. Doppler Effect • As a police car with its siren moves toward you, the pitch becomes higher and higher. • As the car goes by the pitch gets lower, but the frequency of the siren is not really changing. • This is the Doppler Effect – when a sound source moves, the frequency of the waves changes because the motion of the source adds motion to the waves. • The moving object creates wave interference that make the sound overlap and seem at a higher pitch.

  17. Music – Section 3 • Music is a set of notes that combine in patterns that are pleasing. • Noise is a set of notes that are not pleasing. • The sound quality of a musical instrument results from the blending of a fundamental tone with its overtones. • Resonance also plays a role in sound quality. • Acoustics is the study of how sounds interact with each other and their environment. • Repeated echoes are called reverberation • Acoustics is used in the design of concert halls to control reverberation and interference.

  18. Sounds • Animal Sounds https://www.youtube.com/watch?v=HFfebBGW37I • Duck Commander Duck Calls https://www.youtube.com/watch?v=00mE-lhe_R8 https://www.youtube.com/watch?v=b1y_U4s6jfs https://www.youtube.com/watch?v=JsAfewifLeM • Game Calls Demonstration

  19. How You Hear Sounds– Section 4 • The outer ear funnels sound waves, the middle ear transmits the waves inward, and the inner ear converts sound waves into a form that travels to your brain. • Outer Ear Parts – Ear Canal, Eardrum • Middle Ear – Hammer, Anvil, Stirrup • Inner Ear – Cochlea • There are many causes of hearing loss, including injury, infection, exposure to loud sounds, and aging • http://kidshealth.org/kid/talk/yucky/earwax.html - Ear Wax • http://www.livestrong.com/article/401602-swimming-and-water-in-the-ear/ - Water in Ear

  20. Quietest room in the world • https://www.youtube.com/watch?v=mXVGIb3bzHI

  21. Using Sound – Section 5 • Echolocation is the use of reflected sound waves to determine distances or to locate objects • Sonar – SOund Navigation And Ranging • Sonar used reflected sound waves under water. • Ultrasound imaging uses reflected sound waves to make visual images inside a body. • The device for ultrasound is called a sonogram

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