Difference between revisions of "Musical acoustics"
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== Classification of musical instruments by vibration dimension and material == | == Classification of musical instruments by vibration dimension and material == | ||
− | [https://secure.wikimedia.org/wikipedia/en/wiki/Hornbostel%E2%80%93Sachs Hornbostel-Sachs] | + | Musical instruments can be classified by vibration material and dimension according to a system devised by Erich Moritz von Hornbostel and Curt Sachs in 1914. It is known as the [https://secure.wikimedia.org/wikipedia/en/wiki/Hornbostel%E2%80%93Sachs Hornbostel-Sachs] system of musical instrument classification. |
* Idiophones: the whole instrument vibrates (3D) | * Idiophones: the whole instrument vibrates (3D) | ||
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* Aerophones: an air column vibrates (1D) | * Aerophones: an air column vibrates (1D) | ||
− | Animations: | + | In this [http://learningobjects.wesleyan.edu/vim/ Virtual instrument museum], all the instruments are organized according to the Hornbostel-Sachs system. |
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+ | How do these classes of instruments make musical sounds? Here are some Animations: | ||
* [http://demonstrations.wolfram.com/TuningFork/ Idiophone: tuning fork] | * [http://demonstrations.wolfram.com/TuningFork/ Idiophone: tuning fork] | ||
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* [http://www.phys.unsw.edu.au/jw/fluteacoustics.html Aerophone: open flute] | * [http://www.phys.unsw.edu.au/jw/fluteacoustics.html Aerophone: open flute] | ||
− | + | Slow motion videos demonstrate the complex vibrations of percussion instruments: | |
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− | Slow motion videos: | ||
[http://www.youtube.com/watch?v=STSWLX23xqc&feature=autoplay&list=PL6ADD47E1536F5C35&index=22&playnext=2 snare drum] | [http://www.youtube.com/watch?v=STSWLX23xqc&feature=autoplay&list=PL6ADD47E1536F5C35&index=22&playnext=2 snare drum] |
Revision as of 13:22, 20 July 2011
Contents
DiscoverE
Some instruments of Egypt
- Kawala (a short end-blown reed flute, open on both ends)
- Nay (like a kawala, but longer)
- Toora (cymbals, beaten together)
- Oud (fretless lute)
- Tabla (an hour-glass shaped drum)
- Daff (a frame drum)
Sufi performances
Many of these instruments are used in mystical Islamic (Sufi) music, as in this staged performance.
Here are some of these instruments performed in a real religious ritual called hadra. Name the instruments you see. Which instruments didn't appear?
Classification of musical instruments by vibration dimension and material
Musical instruments can be classified by vibration material and dimension according to a system devised by Erich Moritz von Hornbostel and Curt Sachs in 1914. It is known as the Hornbostel-Sachs system of musical instrument classification.
- Idiophones: the whole instrument vibrates (3D)
- Membranophones: a membrane vibrates (2D)
- Chordophones: a string vibrates (1D)
- Aerophones: an air column vibrates (1D)
In this Virtual instrument museum, all the instruments are organized according to the Hornbostel-Sachs system.
How do these classes of instruments make musical sounds? Here are some Animations:
Slow motion videos demonstrate the complex vibrations of percussion instruments:
How would you classify the Egyptian instruments?
- Kawala
- Nay
- Toora
- Oud
- Tabla
- Daff
General acoustics
http://www.falstad.com/mathphysics.html
http://demonstrations.wolfram.com/SoundsOfWaveforms/
http://demonstrations.wolfram.com/TheSoundOfSineWaves/
http://demonstrations.wolfram.com/OutgoingWavesGeneratedByAPulsatingSource/
Musical acoustics
https://secure.wikimedia.org/wikipedia/en/wiki/Musical_acoustics
http://www.phys.unsw.edu.au/music/
http://www.audiosonica.com/en/course/post/2/Index
http://www.physics.umd.edu/deptinfo/facilities/lecdem/misc/phys102/index.htm
http://www.phys.cwru.edu/ccpi/
http://www.fortunecity.com/tinpan/lennon/362/english/acoustics.htm
http://www.acoustics.salford.ac.uk/feschools/index.htm
One dimensional vibrations
Classification
https://secure.wikimedia.org/wikipedia/en/wiki/Hornbostel%E2%80%93Sachs
Chordophones
http://demonstrations.wolfram.com/TheVibratingString/
http://www.falstad.com/mathphysics.html
Aerophones
http://www.phys.unsw.edu.au/jw/flutes.v.clarinets.html
Two dimensional vibrations
Membranophones
http://demonstrations.wolfram.com/VibrationsOfARectangularMembrane/
http://www.falstad.com/mathphysics.html
http://demonstrations.wolfram.com/ChladniFigures/