title: Experimental verification of transient nonlinear acoustical holography.
abstract: This paper presents an experimental study on nonlinear transient acoustical holography. The validity and effectiveness of a recently proposed nonlinear transient acoustical holography algorithm is evaluated in the presence of noise. The acoustic field measured on a post-focal plane of a high-intensity focused transducer is backward projected to reconstruct the pressure distributions on the focal and a pre-focal plane, which are shown to be in good agreement with the measurement. In contrast, the conventional linear holography produces erroneous results in this case where the nonlinearity involved is strong. Forward acoustic field projection was also carried out to further verify the algorithm.
authors: Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA. yjing2@ncsu.edu
authors: Yun
authors: Y
authors: Jing
authors: Jonathan
authors: J
authors: Cannata
authors: Tianren
authors: T
authors: Wang
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000465:Algorithms; D004867:Equipment Design; D006696:Holography / Q000295:instrumentation; D009038:Motion; D017711:Nonlinear Dynamics; D011312:Pressure; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014160:Transducers, Pressure