Parametric sound fields by phase-cancellation excitation of primary waves.
2008 (English)Conference paper (Refereed) Published
By radiating bifrequency primary waves from two ultrasonic emitters with changing the phases of the primary waves, we can obtain the sound fields that are different from the usual in‐phase excitation. Especially, for the excitation of out‐phase by 180 degrees the difference frequency wave has the directivity of almost uniformity near the acoustic axis. Additionally, the sound pressure levels of the harmonic components of the difference frequency and the primary waves as well are suppressed by 10 dB and more
Place, publisher, year, edition, pages
Stockholm: American Institute of Physics , 2008.
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:bth-6831DOI: http://dx.doi.org/10.1063/1.2956216Local ID: oai:bth.se:forskinfo6775239E19BE8055C1257C3D00397820OAI: oai:DiVA.org:bth-6831DiVA: diva2:834378
I18th International Symposium on Nonlinear Acoustics