Friday, April 3, 2009

Wave Motion Gun


Even though the title and the picture (the effect in the picture is based off the same concept as this journal though! [i think]) kind of suggest something, i'm not referring to illicit items, but the physics involved in my electric guitar. After learning about waves in our latest lesson, i began to notice the transverse waves created when i plucked my strings in stage band, which consequently produces longitudinal waves of sound that travel through the air and the floor and to our ears for interpretation. Sound and light are types of mechanical waves, and thus involve this force and said mediums to travel though. These waves cause particles to move back and forth, which allows the transfer of energy. Waves are measured in several different ways, all of which i found are important to my playing. The amplitude of a wave measures the height of the crest to the equilibrium and is percieved as the volume, as it increases so does the volume. The wavelength of a wave is the length of one cycle in meters, and as it decreases the frequency, or number of cycles per second, increases since they are inversely proportional. Thus, when i fret higher frets on the guitar, i am shortening the wavelength and thus increasing the frequency, which raises the pitch as we percieve it. Electric guitars have an added depth of physics, and their sound is made possible through electromagnetic induction, which uses the magnets in the pickups and the change in flux caused by plucking the strings, which disturbs the magnetic field to induce a current, which is sent to the amplifier, thru which the signal is magnified to produce "one big blast from your wave motion gun," although in a different context.

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