{"id":"https://openalex.org/W2969301970","doi":"https://doi.org/10.4050/f-0075-2019-14455","title":"Tonal Noise Control using Rotor Phase Synchronization","display_name":"Tonal Noise Control using Rotor Phase Synchronization","publication_year":2019,"publication_date":"2019-05-13","ids":{"openalex":"https://openalex.org/W2969301970","doi":"https://doi.org/10.4050/f-0075-2019-14455","mag":"2969301970"},"language":"en","primary_location":{"id":"doi:10.4050/f-0075-2019-14455","doi":"https://doi.org/10.4050/f-0075-2019-14455","is_oa":false,"landing_page_url":"https://doi.org/10.4050/F-0075-2019-14455","pdf_url":null,"source":{"id":"https://openalex.org/S7407089261","display_name":"Vertical Flight Society Forum","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the Vertical Flight Society 75th Annual Forum and Technology Display","raw_type":"proceedings-article"},"volume":null,"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5074604641","display_name":"Noah H. Schiller","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1319063186","display_name":"Langley Research Center","ror":"https://ror.org/0399mhs52","country_code":"US","type":"facility","lineage":["https://openalex.org/I1319063186","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Noah Schiller","raw_affiliation_strings":["NASA Langley Research Center"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA Langley Research Center","institution_ids":["https://openalex.org/I1319063186"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5033764178","display_name":"Kyle A. Pascioni","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1319063186","display_name":"Langley Research Center","ror":"https://ror.org/0399mhs52","country_code":"US","type":"facility","lineage":["https://openalex.org/I1319063186","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Kyle Pascioni","raw_affiliation_strings":["NASA Langley Research Center"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA Langley Research Center","institution_ids":["https://openalex.org/I1319063186"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5072677070","display_name":"Nikolas S. Zawodny","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1319063186","display_name":"Langley Research Center","ror":"https://ror.org/0399mhs52","country_code":"US","type":"facility","lineage":["https://openalex.org/I1319063186","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Nikolas Zawodny","raw_affiliation_strings":["NASA Langley Research Center"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA Langley Research Center","institution_ids":["https://openalex.org/I1319063186"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I1319063186"],"apc_list":null,"apc_paid":null,"fwci":3.1732,"has_fulltext":false,"cited_by_count":32,"citation_normalized_percentile":{"value":0.92493643,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"12"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11008","display_name":"Aerodynamics and Acoustics in Jet Flows","score":0.9765999913215637,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11008","display_name":"Aerodynamics and Acoustics in Jet Flows","score":0.9765999913215637,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12759","display_name":"Vehicle Noise and Vibration Control","score":0.007000000216066837,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10944","display_name":"Turbomachinery Performance and Optimization","score":0.003100000089034438,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/tonal-noise","display_name":"tonal noise","score":0.8100000023841858},{"id":"https://openalex.org/keywords/rotor-noise-reduction","display_name":"rotor noise reduction","score":0.48899999260902405},{"id":"https://openalex.org/keywords/blade-passing-frequency","display_name":"blade passing frequency","score":0.7419999837875366},{"id":"https://openalex.org/keywords/thrust","display_name":"thrust","score":0.4429999887943268},{"id":"https://openalex.org/keywords/octocopter","display_name":"octocopter","score":0.7900000214576721},{"id":"https://openalex.org/keywords/sound-pressure-level","display_name":"sound pressure level","score":0.4269999861717224}],"concepts":[{"id":"https://openalex.org/C17281054","wikidata":"https://www.wikidata.org/wiki/Q193466","display_name":"Rotor (electric)","level":2,"score":0.6567201614379883},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.652353048324585},{"id":"https://openalex.org/C189039984","wikidata":"https://www.wikidata.org/wiki/Q8225412","display_name":"Directivity","level":3,"score":0.6153183579444885},{"id":"https://openalex.org/C2778562939","wikidata":"https://www.wikidata.org/wiki/Q1298791","display_name":"Synchronization (alternating current)","level":3,"score":0.6007861495018005},{"id":"https://openalex.org/C44280652","wikidata":"https://www.wikidata.org/wiki/Q104837","display_name":"Phase (matter)","level":2,"score":0.5274757742881775},{"id":"https://openalex.org/C99498987","wikidata":"https://www.wikidata.org/wiki/Q2210247","display_name":"Noise (video)","level":3,"score":0.5181466341018677},{"id":"https://openalex.org/C67514181","wikidata":"https://www.wikidata.org/wiki/Q1588477","display_name":"Sound power","level":3,"score":0.5178933143615723},{"id":"https://openalex.org/C159737794","wikidata":"https://www.wikidata.org/wiki/Q124274","display_name":"Azimuth","level":2,"score":0.5149950981140137},{"id":"https://openalex.org/C194027367","wikidata":"https://www.wikidata.org/wiki/Q4420475","display_name":"Phase synchronization","level":3,"score":0.49884939193725586},{"id":"https://openalex.org/C79420006","wikidata":"https://www.wikidata.org/wiki/Q533668","display_name":"Thrust","level":2,"score":0.4964035153388977},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.46290573477745056},{"id":"https://openalex.org/C68115822","wikidata":"https://www.wikidata.org/wiki/Q1068172","display_name":"Sound pressure","level":2,"score":0.4593093991279602},{"id":"https://openalex.org/C198082294","wikidata":"https://www.wikidata.org/wiki/Q3399648","display_name":"Position (finance)","level":2,"score":0.44901084899902344},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.4474155008792877},{"id":"https://openalex.org/C13662910","wikidata":"https://www.wikidata.org/wiki/Q193139","display_name":"Trajectory","level":2,"score":0.44549208879470825},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3824540376663208},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.3618887662887573},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.26504942774772644},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.21355509757995605},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.15923401713371277},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.14770084619522095},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.1380341649055481},{"id":"https://openalex.org/C203718221","wikidata":"https://www.wikidata.org/wiki/Q491713","display_name":"Sound (geography)","level":2,"score":0.11696898937225342},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.09590435028076172},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.0},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.0},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.4050/f-0075-2019-14455","doi":"https://doi.org/10.4050/f-0075-2019-14455","is_oa":false,"landing_page_url":"https://doi.org/10.4050/F-0075-2019-14455","pdf_url":null,"source":{"id":"https://openalex.org/S7407089261","display_name":"Vertical Flight Society Forum","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the Vertical Flight Society 75th Annual Forum and Technology Display","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4285736299","https://openalex.org/W4411420270","https://openalex.org/W4414140269","https://openalex.org/W3192783709","https://openalex.org/W4412995519","https://openalex.org/W4282560702","https://openalex.org/W2998044203","https://openalex.org/W7124246366","https://openalex.org/W4412486842","https://openalex.org/W4399271239"],"abstract_inverted_index":{"The":[0,44,73],"purpose":[1],"of":[2,53,113,130,146],"this":[3],"study":[4],"is":[5,46,75],"to":[6,14,63,78,140],"determine":[7],"if":[8],"phase":[9,112,135],"synchronization":[10,25,136],"can":[11,103,137],"be":[12,104,138],"used":[13,77,139],"reduce":[15],"the":[16,28,31,66,70,80,94,99,109,114,147,152,159,163],"net":[17],"radiated":[18,95],"sound":[19,96,148],"power":[20,97],"from":[21],"two":[22,127],"rotors.":[23,115],"Phase":[24],"implies":[26],"that":[27,65,93,134],"rotors":[29],"have":[30],"same":[32],"rotational":[33],"speed":[34],"with":[35,61],"a":[36,123,142],"fixed":[37],"relative":[38,110],"azimuthal":[39,111],"blade":[40,100,153],"position,":[41],"or":[42],"phase.":[43],"concept":[45],"evaluated":[47],"both":[48],"experimentally":[49],"and":[50,56,83,89],"numerically.":[51],"Measurements":[52],"source":[54],"directivity":[55],"thrust":[57],"are":[58,119],"initially":[59],"compared":[60],"predictions":[62,118],"confirm":[64],"model":[67,74],"accurately":[68],"captures":[69],"relevant":[71,85],"trends.":[72],"then":[76],"explore":[79],"design":[81],"space":[82],"identify":[84],"parameters.":[86],"Both":[87],"experimental":[88],"numerical":[90],"results":[91],"show":[92,133],"at":[98,151],"passage":[101,154],"frequency":[102,155],"reduced":[105],"by":[106],"appropriately":[107],"controlling":[108],"Vehicle":[116],"level":[117,150],"also":[120],"provided":[121],"for":[122],"notional":[124],"octocopter,":[125],"comparing":[126],"different":[128],"modes":[129],"operation.":[131],"Predictions":[132],"achieve":[141],"4-5":[143],"dB":[144],"reduction":[145],"pressure":[149],"nearly":[156],"everywhere":[157],"on":[158],"ground":[160],"plane":[161],"beneath":[162],"vehicle.":[164]},"counts_by_year":[{"year":2026,"cited_by_count":4},{"year":2025,"cited_by_count":6},{"year":2024,"cited_by_count":14},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":4}],"updated_date":"2026-10-26T11:51:55.731654","created_date":"2019-08-29T00:00:00"}