{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:39:39Z","timestamp":1760243979861,"version":"build-2065373602"},"reference-count":39,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2009,3,4]],"date-time":"2009-03-04T00:00:00Z","timestamp":1236124800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Algorithms"],"abstract":"<jats:p>An algorithm for the suppression of the radiation and scattering fields created by vibration of the smooth closed surface of a body of arbitrary shape placed in a liquid is designed and analytically explored. The frequency range of the suppression allows for both large and small wave sizes on the protected surface. An active control system is designed that consists of: (a) a subsystem for fast formation of a desired distribution of normal oscillatory velocities or displacements (on the basis of pulsed Huygens' sources) and (b) a subsystem for catching and targeting of incident waves on the basis of a grid (one layer) of monopole microphones, surrounding the surface to be protected. The efficiency and stability of the control algorithm are considered. The algorithm forms the control signal during a time much smaller than the minimum time scale of the waves to be damped. The control algorithm includes logical and nonlinear operations, thus excluding interpretation of the control system as a traditional combination of linear electric circuits, where all parameters are constant (in time). This algorithm converts some physical body placed in a liquid into one that is transparent to a special class of incident waves. The active control system needs accurate information on its geometry, but does not need either prior or current information about the vibroacoustical characteristics of the protected surface, which in practical cases represents a vast amount of data.<\/jats:p>","DOI":"10.3390\/a2010361","type":"journal-article","created":{"date-parts":[[2009,3,4]],"date-time":"2009-03-04T12:14:06Z","timestamp":1236168846000},"page":"361-397","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Algorithm for Active Suppression of Radiation and Acoustical Scattering Fields by Some Physical Bodies in Liquids"],"prefix":"10.3390","volume":"2","author":[{"given":"Vladimir V.","family":"Arabadzhi","sequence":"first","affiliation":[{"name":"Institute of Applied Physics, Russian Academy of Science, 603950 Nizhny Novgorod, Ulianov St. 46, Russian Federation"}]}],"member":"1968","published-online":{"date-parts":[[2009,3,4]]},"reference":[{"key":"ref_1","first-page":"3","article-title":"Invisibility: \u201cpro\u201d and \u201ccontra\u201d","volume":"6","author":"Rozanov","year":"2008","journal-title":"Priroda"},{"key":"ref_2","first-page":"879","article-title":"A nonscattering coating for a cylinder","volume":"6","author":"Bobrovnitski","year":"2008","journal-title":"Acoustical Physics"},{"key":"ref_3","first-page":"0166623","article-title":"Achieving transparency with plasmonic and metamaterial coatings","volume":"E72","author":"Alu","year":"2005","journal-title":"Physical Review"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"977","DOI":"10.1126\/science.1133628","article-title":"Metamaterial electromagnetic cloak at microwave frequencies","volume":"314","author":"Shurig","year":"2006","journal-title":"Science"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"323","DOI":"10.1088\/1367-2630\/9\/9\/323","article-title":"Acoustic metamaterials for two-dimensional sonic devices","volume":"9","author":"Torrent","year":"2007","journal-title":"New Journal of Physics"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"376","DOI":"10.1364\/JOSA.65.000376","article-title":"Invisible bodies","volume":"65","author":"Kerker","year":"1975","journal-title":"Journal of the Optical Society of America"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"024301","DOI":"10.1103\/PhysRevLett.100.024301","article-title":"Scattering theory derivation of a 3D acoustic cloaking shell","volume":"100","author":"Cummer","year":"2008","journal-title":"Physical Review Letter"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1088\/1367-2630\/8\/7\/118","article-title":"Notes on conformal invisibility devices","volume":"8","author":"Leonhard","year":"2006","journal-title":"New Journal of Physics"},{"key":"ref_9","first-page":"383","article-title":"Active sound absorbers in an air ducts","volume":"6","author":"Jessel","year":"1973","journal-title":"Sound and Vibration"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"852","DOI":"10.1121\/1.1534834","article-title":"Active control of acoustic reflection, absorption and transmission using thin panel speakers","volume":"2","author":"Zhu","year":"2003","journal-title":"Journal of the Acoustical Society of America"},{"key":"ref_11","first-page":"2501","article-title":"Active output absorption in the active control sound","volume":"5","author":"Elliott","year":"1993","journal-title":"Journal of the Acoustical Society of America"},{"key":"ref_12","unstructured":"Premount, A. 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