ACOUSTICS HARMONICS LABS James Vanderburg Danny Garcia Dr

ACOUSTICS & HARMONICS LABS James Vanderburg Danny Garcia Dr. Brad Conrad, Dept. of Physics and Astronomy The Science, Technology, Engineering, and Mathematics Talent Expansion Program (STEP)

Overview • Edited Acoustic & Harmonic Labs for Phy 1812 and 1814 • Expanded the text / Troubleshoot • Easier to understand for non-majors • Increased physics content • • Goal: To make labs simple yet entertaining • Most students are musicians or recording majors http: //www. mediacollege. com/audio/images/loudspeaker-waveform. gif

Labs • http: //www. patana. ac. th/secondary/science/anrophys ics/ntopic 4/images/spring%20 air%20 damping. gif http: //www. taiwantrade. com. tw/resources/member/169597/pro ductcatalog/84 a 61913 -4 e 85 -45 a 9 -9 cab-257 f 2 fd 5 e 649_A 01743 W-Y 31. JPG

Labs cont’d… • http: //people. rit. edu/andpph/photofilesci/vibration-string-6249. jpg

Laser Microphone • How it works: Sound waves inside room cause window to vibrate • Laser bounces off window and back to receiver / photoreceptor • Receiver converts back to sound • laser and bounces off of a window vibrates due to sound • Laser reflection is modified Receiver picks up modified sound http: //farm 4. static. flickr. com/3006/2965414094_54 a 15 ec 174. j pg http: //marinebio. org/i/sound. jpg http: //justglasssite. com/glass-pics/window-7. jpg

Laser Microphone Lab • How we will set up the lab: • Figures below illustrate basic idea • 2 week lab to set up laser, and to collect data • Plan to make lab next semester

Acknowledgments We’d like to thank: • Dr. Brad Conrad for being a pretty cool dude • Dr. Tashakkori for arranging EVERYTHING!!! • NSF for providing the “mula” • We would like to thank the Physics Department, and Appalachian State University for allowing us to use their facilities.