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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2021-8-16-20</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1931</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>30-летие коомет</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THE 30TH ANNIVERSARY OF COOMET</subject></subj-group></article-categories><title-group><article-title>Аналитическое представление комплексной частотной характеристики гидрофона</article-title><trans-title-group xml:lang="en"><trans-title>Analytical representation of hydrophone complex frequency response</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0718-5234</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Исаев</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Isaev</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Евгеньевич Исаев</p><p>г. п. Менделеево, Московская обл.</p></bio><bio xml:lang="en"><p>Alexander E. Isaev</p><p>Mendeleevo, Moscow Region</p></bio><email xlink:type="simple">isaev@vniiftri.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хатамтаев</surname><given-names>Б. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Khatamtaev</surname><given-names>B. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Булат Ильгизович Хатамтаев</p><p>г. п. Менделеево, Московская обл.</p></bio><bio xml:lang="en"><p>Bulat I. Khatamtaev</p><p>Mendeleevo, Moscow Region</p></bio><email xlink:type="simple">bulat_3004@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт физико-технических и радиотехнических измерений</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Metrological Institute of Technical Physics and Radio Engineering (VNIIFTRI)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>09</day><month>08</month><year>2023</year></pub-date><volume>0</volume><issue>8</issue><fpage>16</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1931">https://www.izmt.ru/jour/article/view/1931</self-uri><abstract><p>Рассмотрена задача аналитического представления экспериментальной комплексной частотной характеристики гидрофона на основе модели, состоящей из линии опережения и минимально-фазовой части. Модель учитывает резонансные свойства гидрофона и влияние дифракции звука на активном элементе. Предложены алгоритмы аппроксимации комплексной частотной характеристики дробно-рациональной функцией комплексной переменной по данным амплитудно-частотной и (или) фазочастотной характеристики гидрофона. Приведены примеры применения алгоритмов для обработки экспериментальных частотных характеристик измерительных гидрофонов. Полученные результаты позволят упростить калибровку и многократно сократить размерность калибровочных данных при сохранении точности, характерной для рабочих измерительных гидрофонов.</p></abstract><trans-abstract xml:lang="en"><p>The problem of analytical representation of hydrophone complex frequency response based on a model consisting of an advance line and a minimum-phase part, which describing the effect of sound diffraction and resonance properties of an active element, is considered. Algorithms are proposed for approximating the hydrophone complex frequency response by a fractional-rational function of the complex variable according to the data of the hydrophone amplitude-frequency and/or phasefrequency responses. Examples of the application of these algorithms for processing experimental frequency characteristics of hydrophones are given.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>фазовая калибровка гидрофона</kwd><kwd>минимально-фазовая частотная характеристика</kwd><kwd>комплексная дробно-рациональная аппроксимация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>hydrophone phase calibration</kwd><kwd>minimum-phase frequency response</kwd><kwd>complex fractional-rational approximation</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Исаев А. Е., Хатамтаев Б. И. 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