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BUILDING THE OPTIMAL OPTICAL GUITAR Presented by: Chasen Himeda Faculty Mentor: Dr. Hossein Asghari Optics and the Guitar Optics is the branch of physics that studies the properties and behavior of light. Focus: Light behavior as a wave Acoustics is the branch of physics that studies the properties and behavior of sound. Focus: Sound behavior as a wave Related Work Queen University (Canada): Hans-Peter Loock Uses sensors to analyze vibration of the guitar body and translates to sound D. Mendiola, M. Norgia, A. Pesatori Replaces guitar strings with laser beams; detection of blocked lasers indicates finger placement M. French, K. Lewis Uses lasers to analyze vibrational patterns across the guitar body Research Question: How can light transmitted through a guitar string serve as a medium for the propagation of sound waves? Translation: How can light be used to produce a guitar’s sound? Methodology/Laboratory Setup Continuous Wave Laser Electro-Optic Modulator Optical Fiber More effective at transmitting light than guitar string Oscilloscope Reads original light wave Reads/Displays wavepattern Computer System Fourier analysis and sound translation Expected Product Upon successful completion of isolating the sound wave from light wave from one string, the laboratory set up can be multiplied by six to simulate the six individual strings of the guitar. Actual guitar tuning can be matched by adjusting the tension of each optical fiber. Experimentation with lab equipment is necessary to efficiently collect data from six strings simultaneously. References Abdul Al-Azzawi, “Photonics: Principles and Practices”, Boca Raton: Taylor & Francis Group, 2007. B.E.A. Saleh and M.C. Teich, “Fundamentals of Photonics”, 2nd ed., Hoboken: John Wiley & Sons, Inc., 2007. David Mario Mendiola, “Laser Guitar,” Massachusetts Institute of Technology, Cambridge, Massachusetts, Tech. Rep., June 2008. M. Norgia and A. Pesatori, “Laser Pitch-Detection for Electric Guitar,” in Proc. IEEE Instrumentation and Measurement Technology Conference, May 2010. Mark French and Keith Lewis, “Modal Analysis of an Acoustic Guitar,” presented at the 13th Int. Modal Analysis Conf., Nashville, Tennessee, 1995. Paul Ridden. (2011, July). System Uses Lasers to Detect the Pitch of a Guitar String Before a Note is Played. Gizmag. [Online]. Available: http://www.gizmag.com/lasersystem-detects-guitar-string-pitch/19278/ Images Used (1)(6) Laser Guitar Prototype (2) Optics Animation (2) Sound Animation (3) Laser Guitar Pitch Detection (5) Animated Waves (5) Electro-Optic Modulator (5) Laser & Optical Fiber (5) Oscilloscope