听
November 2018 Issue, Volume 86, No. 11
听
Using schlieren optics as a tool to see the invisible, we describe a technique of visualizing traveling ultrasonic (28?kHz) sound waves in real time. Suitable for lecture demonstration purposes or as an instructional laboratory experiment, our setup can readily demonstrate the reflection of sound waves from surfaces, diffraction effects around objects, interference, and standing waves. Additionally, the incorporation of color filters provides information such as gradient directions and sound wave phase differences not obtainable with just a white light source. As an example, acoustic standing waves are analyzed.
听
Papers
by Christian G. Fink. DOI: /10.1119/1.5054288
by M. H眉bner, and J. Kr枚ger. DOI: 10.1119/1.5051179
by Julio G眉茅mez, and Manuel Fiolhais. DOI: 10.1119/1.5052359
by C. M. Orban, R. M. Teeling-Smith, J. R. H. Smith, and C. D. Porter. DOI: 10.1119/1.5058449
by B茅atrice Bonga, Eric Poisson, and Huan Yang. DOI: 10.1119/1.5054590
by SFrancisco G. M. Orlando, C. Farina, Carlos A. D. Zarro, and P. Terra. DOI: /10.1119/1.5055760
Back of the Envelope
by Sanjoy Mahajan. DOI: 10.1119/1.5058771
Physics Education Research
by David P. Smith, Laurie E. McNeil, David T. Guynn, Alice D. Churukian, Duane L. Deardorff, and Colin S. Wallace. DOI: 10.1119/1.5058685
Apparatus and Demonstration Notes
by Allen Crockett, and Wolfgang Rueckner. DOI: 10.1119/1.5042245
Book Reviews
by Brian Schwartz. DOI: 10.1119/1.5052429
by G. David Brin. DOI: 10.1119/1.5053112
Books Received
. DOI:
听
General Information, Resources for Authors, Reviewers, and Readers
听
 |