{"id":{"repo_id":"nps","oai_identifier":"oai:calhoun.nps.edu:10945/14984"},"canonical_url":"https://search.dev.ndltd.org/etd/nps/oai:calhoun.nps.edu:10945/14984","repository":{"repo_id":"nps","name":"Naval Postgraduate School","base_url":"https://calhoun.nps.edu/server/oai/request"},"display":{"title":"An electro-mechanical acoustic imaging scanner assembly.","abstract":"The design of \"a combined electro-mechanical acoustic image scanning assembly is described. Various acoustic imaging system techniques have demonstrated an ability to form underwater images at distances greater than those obtained by optical means. The scanning assembly -utilizes a sixteen element linear transducer array mounted on the radius of an eight inch diameter circle at the focal plane of an acoustic lens. The line array is rotated at a constant speed of 400 RPM. Acoustic signals at 250 KHZ of approximately 26 db re 1 ubar at the transducers were sufficient to produce satisfactory detection.","abstract_html":"The design of "a combined electro-mechanical acoustic image scanning assembly is described. Various acoustic imaging system techniques have demonstrated an ability to form underwater images at distances greater than those obtained by optical means. The scanning assembly -utilizes a sixteen element linear transducer array mounted on the radius of an eight inch diameter circle at the focal plane of an acoustic lens. The line array is rotated at a constant speed of 400 RPM. Acoustic signals at 250 KHZ of approximately 26 db re 1 ubar at the transducers were sufficient to produce satisfactory detection.","abstract_has_math":false,"creators":["Pearson, John Davis"],"institution":"Monterey, California ; Naval Postgraduate School","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Engineering Acoustics","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1970,"date_issued":"1970-12","date_published":"1970-12","updated_at":"2026-07-27T20:26:50Z","subjects":[],"languages":["en_US"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10945/14984","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Engineering Acoustics"]},{"key":"dc:creator","label":"Author","values":["Pearson, John Davis"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2012-11-01T22:54:44Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2012-11-01T22:54:44Z"]},{"key":"dc:date.issued","label":"Date","values":["1970-12"]},{"key":"dc:publisher","label":"Institution","values":["Monterey, California ; Naval Postgraduate School"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10945/14984"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The design of \"a combined electro-mechanical acoustic image scanning assembly is described. Various acoustic imaging system techniques have demonstrated an ability to form underwater images at distances greater than those obtained by optical means. The scanning assembly -utilizes a sixteen element linear transducer array mounted on the radius of an eight inch diameter circle at the focal plane of an acoustic lens. The line array is rotated at a constant speed of 400 RPM. Acoustic signals at 250 KHZ of approximately 26 db re 1 ubar at the transducers were sufficient to produce satisfactory detection."]},{"key":"dc:title","label":"Title","values":["An electro-mechanical acoustic imaging scanner assembly."]}]}],"canonical_facts":{"dc:contributor.department":["Engineering Acoustics"],"dc:creator":["Pearson, John Davis"],"dc:date.accessioned":["2012-11-01T22:54:44Z"],"dc:date.available":["2012-11-01T22:54:44Z"],"dc:date.issued":["1970-12"],"dc:description.abstract":["The design of \"a combined electro-mechanical acoustic image scanning assembly is described. Various acoustic imaging system techniques have demonstrated an ability to form underwater images at distances greater than those obtained by optical means. The scanning assembly -utilizes a sixteen element linear transducer array mounted on the radius of an eight inch diameter circle at the focal plane of an acoustic lens. The line array is rotated at a constant speed of 400 RPM. Acoustic signals at 250 KHZ of approximately 26 db re 1 ubar at the transducers were sufficient to produce satisfactory detection."],"dc:identifier.uri":["https://hdl.handle.net/10945/14984"],"dc:language.iso":["en_US"],"dc:publisher":["Monterey, California ; Naval Postgraduate School"],"dc:title":["An electro-mechanical acoustic imaging scanner assembly."],"dc:type":["Thesis"]},"updated_at":"2026-07-27T20:26:50Z"}