Waves and Sound
Text: pages 456-478. 5 day unit.
Conceptual Text: pages 372-403. 2 week unit.
Objectives
After completing this section, students will be able to:
1. identify the main parts of, and compare and contrast, compression and transverse waves,
2. identify and explain the main qualities of sound: tone, loudness, pitch,
3. explain refraction, reflection, diffraction, interference of sound waves, as well as the Doppler effect,
4. use the speed of sound to predict the distance to a distant object,
5. explain how the strings of an electric guitar can be manipulated to change the frequency produced.
Click here for a PowerPoint Slideshow on important terms
Activities
1. Demonstration of transverse and compression wave using a rope and slinky
2. Singing rod and thunder drum
3. Video of Tacoma Narrows Bridge collapse
4. Labs exploring tunings forks, standing waves in organ pipes and bottles, and an electric guitar
5. A web lesson
6. Observing various guitar techniques in a series of concert videos.
Web Research Links
To optimize machine performance, close each hyperlink window when finished with the site.
1. What are waves http://www.bbc.co.uk/schools/gcsebitesize/physics/waves/whatarewavesrev1.shtml
2. Run this interference applet http://www.eserc.stonybrook.edu/ProjectJava/WaveInt/
3. Doppler Effect http://physics.uwstout.edu/physapplets/a-city/physengl/dopplerengl.htm
4. Thunderstorm Distance http://science.howstuffworks.com/question182.htm
5. Soundry http://library.thinkquest.org/19537/?tqskip1=1
Conceptual Links
1. http://www.colorado.edu/physics/2000/applets/fourier.html
2. http://users.erols.com/renau/wave_interference.html
3. Circular Motion = Simple Harmonic Motion http://www.phy.ntnu.edu.tw/java/shm/shm.html
4. Dynamite SHM animation http://id.mind.net/~zona/mstm/physics/mechanics/simpleHarmonicMotion/vrmlshm.html
5. Full SHM explanation http://www.plus2physics.com/vibrations/study_material.asp?chapter=1
6. Musical Instruments http://www.physicsclassroom.com/Class/sound/soundtoc.html
7. The singing rod http://www.intuitor.com/resonance/resDemo.html
Frequency Generators
http://neuralsemantics.com/applets/jazz.html
BONUS SITES: If you finish all the sites, visit http://www.aps.org/resources/waves.shtml
Online nearing test: http://www.selftestonline.com/pages/tests/audio/testsystem.php
Tacoma Narrows Bridge site from PBS. Watch it collapse.
Watch a sonic boom!
Here are some fine examples of guitars from the Rock and Roll Hall of Fame.
The ultimate guitar site http://library.thinkquest.org/16088/mainfrm.shtml
Electric Guitar http://www.howstuffworks.com/electric-guitar.htm
http://pdg.lbl.gov/~aerzber/aps_waves.html
Piano http://lectureonline.cl.msu.edu/%7Emmp/applist/sound/sound.html
Beats http://www.walter-fendt.de/ph11e/beats.htm
Thinkquest http://library.thinkquest.org/18160/contents.htm
http://library.thinkquest.org/26585/
Thinkquest http://library.thinkquest.org/C005705/English/Waves/index.htm
Some waves to look at http://icg.fas.harvard.edu/~scia49/demonstrations/
Compare waves http://ajax.chemistry.adelaide.edu.au/ntnujava/waveType/waveType.html
Reflection/refraction http://www.fisica.uniud.it/~deangeli/applets/Multimedia/Waves_java/Snell/propagation.html
Waves http://www.physicsclassroom.com/Class/waves/wavestoc.html