Download or read book An Experimental Biconvex Liquid filled Acoustic Lens written by Jackie Lee Roudebush and published by . This book was released on 1969 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study has been made of the properties of a biconvex liquid-filled acoustic lens formed by pressurizing a refracting fluid between two deformable diaphragms. Trichlorotrifluoroethane was used as the refracting liquid and stainless steel sheets 76 cm in diameter and 0.3 mm (0.012 inch) thick were used as the diaphragm material. Distortion of the spherical surfaces due to the weight of the liquid was negligible because of the tension developed by the internal hydrostatic pressure (1.4 atmospheres for focal length 1.2 meters). Acoustic diffraction patterns measured at f/4.0 in water at frequencies from 200 KHz to 500 KHz compare favorably with patterns computed numerically. Multiple focal points were found and can be associated with multiple internal reflections. (Author).
Download or read book Theoretical and Experimental Investigation of Cylindrical Liquid filled Acoustic Lenses with D lambda Ratios Greater Than 15 written by Donald L. Folds and published by . This book was released on 1968 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing properties of liquid-filled cylindrical acoustic lenses are investigated theoretically and experimentally for d/lambda ratios greater than 15. A mathematical model which includes the effects of the lens shell is described and used to predict directivity patterns. Based on this model, a right-circular cylindrical lens, 40 cm in diameter, was constructed and tested at frequencies ranging from 25 to 900 khz. Agreement of experimental directivity patterns with those predicted demonstrated feasibility of the lens at d/lambda ratios up to 150, a factor of 10 greater than previously reported. Theoretical investigation indicates that for d/lambda ratios greater than 150 the elliptical cylindrical lens shows promise, but fabrication of an experimental model is yet to be undertaken. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1978 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Acoustical Holography written by L. Kessler and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers presented at the Seventh International Symposium on Acoustical Imaging and Holography. The meeting was held in Chicago, Illinois U.S.A. on August 30 - September 1, 1976. Since 1967 this series of conferences has served as an international forum for bringing together the many different facets of the ultrasonic visualization field. Medical diagnosis, nondestructive testing, underwater viewing, seismic the mapping, and acoustic analytical microscopy are examples of broad range applications of this technology. Throughly broad in scope, the common denominator that binds this volume together is the application of engineering and physics disciplines to the creation of images by means of ultrasonic waves. Efforts on the part of the program committe and their institutions are greatly appreciated, They are acknowledged below: Newell Booth Nave lex Arlington, Va. Byron B. Brendan Holosonics, Inc. Richland, Wa. Reginald C. Eggleton ICFAR-IU Medical School Indianapolis, In. Stanford Research Institute Philip S. Green Menlo Park, Ca. Henry Karplus Argonne National Labs Argonne, Il. J.D. Meindl Stanford University Stanford, Ca. Alexander F. Metherell University of California Irvine, Ca. R.K. Mueller University of Minnesota Stillwater, Mn. Frederick L. Thurstone Duke University Durham, N.C. vii viii PREFACE Glen Wade University of California Santa Barbara, Ca. Keith Wang University of Houston Houston, Tx.
Download or read book Compilation of Abstracts of Dissertations Theses and Research Papers Submitted by Candidates for Degrees written by Naval Postgraduate School (U.S.) and published by . This book was released on 1967 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of Dissertations Theses and Research Papers Submitted by Candidates for Degrees written by Naval Postgraduate School (U.S.) and published by . This book was released on 1966 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1970 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An experimental study of acoustic lenses and prisms using cylindrical rods written by John David Gavenda and published by . This book was released on 1956 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1970 with total page 1344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1970 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1970 with total page 1328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elementary Treatise on Physics Experimental and Applied for the Use of Colleges and Schools written by Adolphe Ganot and published by . This book was released on 1872 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1971 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master s Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1971 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elementary Treatise on Physics Experimental and Applied written by Adolphe Ganot and published by . This book was released on 1863 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
