Where did the inspiration for this project come from and how did it get started? The inspiration comes straight from my work with instruments and loudpeakers.
- Dolmetsch Online - Physics of Musical Instruments - Introduction?
- Fundamental University Physics;
- Miss Wonderful (Carsington Family Series).
- When Roles Reverse: A Guide to Parenting Your Parents.
Loudspeakers produce sound, most often composed sounds. So over the years, I have come to view loudspeakers as instruments: if they are bad, they will reproduce your music in an incomplete or distorted way; if they are good, you will get the whole spectrum of the sound you composed.
I work with loudspeakers in a very conscientious manner, since they are the carriers of my sounds. I saw and heard the original acousmonium at Radio France. It left a deep impression. I was part of a project that created a loudspeaker that could project sounds with different directivity patterns, just like musical instruments.
This interest never left me, and so in realizing the Eastman Mobile Acousmonium [EMA], we are creating loudspeakers, that can actually physically move: twist, turn, tilt, and so change the way they interact with acoustic space. We are working with sound in a quasi-sculptural manner, in that we physically control how it radiates into the world. The end of the tube represents a boundary between the enclosed air in the tube and the expanse of air outside of the tube.
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Upon reaching the end of the tube, the sound wave will undergo partial reflection and partial transmission. That is, a portion of the energy carried by the sound wave will pass across the boundary and out of the tube transmission and a portion of the energy carried by the sound wave will reflect off the boundary, remain in the tube and travel in the opposite direction reflection. The reflected pulse off the end of the tube can then interfere with any subsequent incident pulses that are traveling in the opposite direction. If the disturbances within the tube are the result of perpetual waves of a constant frequency, then interference between the incident and reflected waves will occur along the length of the tube.
The reflection behavior of sound waves and the subsequent interference that occurs will become important in Lesson 5 during the discussion of musical instruments. Many musical instruments operate as the result of sound waves traveling back and forth inside of "tubes" or air columns.
Standing Waves and Musical Instruments
The reflection of sound also becomes important to the design of concert halls and auditoriums. The acoustics of sound must be considered in the design of such buildings. The most important considerations include destructive interference and reverberations, both of which are the result of reflections of sound off the walls and ceilings. Designers attempt to reduce the severity of these problems by using building materials that reduce the amount of reflection and enhance the amount of transmission or absorption into the walls and ceilings.
The most reflective materials are those that are smooth and hard; such materials are very dissimilar to air and thus reduce the amount of transmission and increase the amount of reflection. The best materials to use in the design of concert halls and auditoriums are those materials that are soft. Wednesday, February 27, Musical Instrument Project. Of all of the projects I've done with my physics class, this is the only one that has consistently come out great.
Keyboard 4 - Honors Pacing Guide
There are often high levels of achievement and a comparatively low risk of incomplete or far below-average projects. Managing these types of projects often means being pulled several ways at once, and the squeaky wheels can sometimes get the grease - it's a difficult balancing act, so look out for that.
One thing that has helped this and my honors physics independent project has been to spread out the work days. Instead of four consecutive days, breaking those up into pairs or singles separated by other work especially review activities can help any groups that don't have an idea or are otherwise behind and increase the overall quality of the projects.