Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2898533975', 'doi': 'https://doi.org/10.1016/j.apacoust.2018.10.021', 'title': 'Resonance frequencies and sound absorption of Helmholtz resonators with multiple necks', 'display_name': 'Resonance frequencies and sound absorption of Helmholtz resonators with multiple necks', 'publication_year': 2018, 'publication_date': '2018-10-28', 'ids': {'openalex': 'https://openalex.org/W2898533975', 'doi': 'https://doi.org/10.1016/j.apacoust.2018.10.021', 'mag': '2898533975'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/j.apacoust.2018.10.021', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S971171794', 'display_name': 'Applied Acoustics', 'issn_l': '0003-682X', 'issn': ['0003-682X', '1872-910X'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': True, 'oa_status': 'green', 'oa_url': 'https://eprints.soton.ac.uk/455667/1/APAC_2018_615.pdf', 'any_repository_has_fulltext': True}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5057560738', 'display_name': 'F. Langfeldt', 'orcid': 'https://orcid.org/0000-0003-2380-2746'}, 'institutions': [{'id': 'https://openalex.org/I70451448', 'display_name': 'HAW Hamburg', 'ror': 'https://ror.org/00fkqwx76', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I70451448']}, {'id': 'https://openalex.org/I159176309', 'display_name': 'Universität Hamburg', 'ror': 'https://ror.org/00g30e956', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I159176309']}], 'countries': ['DE'], 'is_corresponding': True, 'raw_author_name': 'F. Langfeldt', 'raw_affiliation_strings': ['Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, Berliner Tor 7a, D–20099 Hamburg, Germany'], 'affiliations': [{'raw_affiliation_string': 'Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, Berliner Tor 7a, D–20099 Hamburg, Germany', 'institution_ids': ['https://openalex.org/I70451448', 'https://openalex.org/I159176309']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5081514929', 'display_name': 'H. Hoppen', 'orcid': 'https://orcid.org/0000-0001-7971-250X'}, 'institutions': [{'id': 'https://openalex.org/I70451448', 'display_name': 'HAW Hamburg', 'ror': 'https://ror.org/00fkqwx76', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I70451448']}, {'id': 'https://openalex.org/I159176309', 'display_name': 'Universität Hamburg', 'ror': 'https://ror.org/00g30e956', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I159176309']}], 'countries': ['DE'], 'is_corresponding': False, 'raw_author_name': 'H. Hoppen', 'raw_affiliation_strings': ['Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, Berliner Tor 7a, D–20099 Hamburg, Germany'], 'affiliations': [{'raw_affiliation_string': 'Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, Berliner Tor 7a, D–20099 Hamburg, Germany', 'institution_ids': ['https://openalex.org/I70451448', 'https://openalex.org/I159176309']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5083954590', 'display_name': 'W. Gleine', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I70451448', 'display_name': 'HAW Hamburg', 'ror': 'https://ror.org/00fkqwx76', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I70451448']}, {'id': 'https://openalex.org/I159176309', 'display_name': 'Universität Hamburg', 'ror': 'https://ror.org/00g30e956', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I159176309']}], 'countries': ['DE'], 'is_corresponding': False, 'raw_author_name': 'W. Gleine', 'raw_affiliation_strings': ['Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, Berliner Tor 7a, D–20099 Hamburg, Germany'], 'affiliations': [{'raw_affiliation_string': 'Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, Berliner Tor 7a, D–20099 Hamburg, Germany', 'institution_ids': ['https://openalex.org/I70451448', 'https://openalex.org/I159176309']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 2, 'corresponding_author_ids': ['https://openalex.org/A5057560738'], 'corresponding_institution_ids': ['https://openalex.org/I70451448', 'https://openalex.org/I159176309'], 'apc_list': {'value': 3670, 'currency': 'USD', 'value_usd': 3670, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 1.423, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 37, 'citation_normalized_percentile': {'value': 0.782119, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 95, 'max': 96}, 'biblio': {'volume': '145', 'issue': None, 'first_page': '314', 'last_page': '319'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10822', 'display_name': 'Acoustic Wave Phenomena Research', 'score': 0.9998, 'subfield': {'id': 'https://openalex.org/subfields/2204', 'display_name': 'Biomedical 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/T10822', 'display_name': 'Acoustic Wave Phenomena Research', 'score': 0.9998, 'subfield': {'id': 'https://openalex.org/subfields/2204', 'display_name': 'Biomedical 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/T11230', 'display_name': 'Innovative Energy Harvesting Technologies', 'score': 0.9822, 'subfield': {'id': 'https://openalex.org/subfields/2210', 'display_name': 'Mechanical 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/T11008', 'display_name': 'Aerodynamics and Acoustics in Jet Flows', 'score': 0.9814, '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/helmholtz-resonator', 'display_name': 'Helmholtz resonator', 'score': 0.9703059}, {'id': 'https://openalex.org/keywords/helmholtz-free-energy', 'display_name': 'Helmholtz free energy', 'score': 0.84157646}, {'id': 'https://openalex.org/keywords/reactance', 'display_name': 'Reactance', 'score': 0.6166297}, {'id': 'https://openalex.org/keywords/acoustic-impedance', 'display_name': 'Acoustic impedance', 'score': 0.43481493}], 'concepts': [{'id': 'https://openalex.org/C170344590', 'wikidata': 'https://www.wikidata.org/wiki/Q1569889', 'display_name': 'Helmholtz resonator', 'level': 3, 'score': 0.9703059}, {'id': 'https://openalex.org/C97126364', 'wikidata': 'https://www.wikidata.org/wiki/Q349669', 'display_name': 'Resonator', 'level': 2, 'score': 0.8657838}, {'id': 'https://openalex.org/C27592594', 'wikidata': 'https://www.wikidata.org/wiki/Q865821', 'display_name': 'Helmholtz free energy', 'level': 2, 'score': 0.84157646}, {'id': 'https://openalex.org/C24890656', 'wikidata': 'https://www.wikidata.org/wiki/Q82811', 'display_name': 'Acoustics', 'level': 1, 'score': 0.74449927}, {'id': 'https://openalex.org/C139210041', 'wikidata': 'https://www.wikidata.org/wiki/Q2145840', 'display_name': 'Resonance (particle physics)', 'level': 2, 'score': 0.69913566}, {'id': 'https://openalex.org/C176661527', 'wikidata': 'https://www.wikidata.org/wiki/Q746935', 'display_name': 'Reactance', 'level': 3, 'score': 0.6166297}, {'id': 'https://openalex.org/C17829176', 'wikidata': 'https://www.wikidata.org/wiki/Q179043', 'display_name': 'Electrical impedance', 'level': 2, 'score': 0.59252983}, {'id': 'https://openalex.org/C98937189', 'wikidata': 'https://www.wikidata.org/wiki/Q975684', 'display_name': 'Acoustic impedance', 'level': 3, 'score': 0.43481493}, {'id': 'https://openalex.org/C125287762', 'wikidata': 'https://www.wikidata.org/wiki/Q1758948', 'display_name': 'Absorption (acoustics)', 'level': 2, 'score': 0.4181534}, {'id': 'https://openalex.org/C192562407', 'wikidata': 'https://www.wikidata.org/wiki/Q228736', 'display_name': 'Materials science', 'level': 0, 'score': 0.4003839}, {'id': 'https://openalex.org/C121332964', 'wikidata': 'https://www.wikidata.org/wiki/Q413', 'display_name': 'Physics', 'level': 0, 'score': 0.37712547}, {'id': 'https://openalex.org/C120665830', 'wikidata': 'https://www.wikidata.org/wiki/Q14620', 'display_name': 'Optics', 'level': 1, 'score': 0.2375654}, {'id': 'https://openalex.org/C184779094', 'wikidata': 'https://www.wikidata.org/wiki/Q26383', 'display_name': 'Atomic physics', 'level': 1, 'score': 0.08244866}, {'id': 'https://openalex.org/C97355855', 'wikidata': 'https://www.wikidata.org/wiki/Q11473', 'display_name': 'Thermodynamics', 'level': 1, 'score': 0.07361016}, {'id': 'https://openalex.org/C165801399', 'wikidata': 'https://www.wikidata.org/wiki/Q25428', 'display_name': 'Voltage', '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/C81288441', 'wikidata': 'https://www.wikidata.org/wiki/Q20736125', 'display_name': 'Ultrasonic sensor', 'level': 2, 'score': 0.0}], 'mesh': [], 'locations_count': 2, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/j.apacoust.2018.10.021', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S971171794', 'display_name': 'Applied Acoustics', 'issn_l': '0003-682X', 'issn': ['0003-682X', '1872-910X'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://eprints.soton.ac.uk/455667/1/APAC_2018_615.pdf', 'pdf_url': 'https://eprints.soton.ac.uk/455667/1/APAC_2018_615.pdf', 'source': {'id': 'https://openalex.org/S4306401019', 'display_name': 'ePrints Soton (University of Southampton)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I43439940', 'host_organization_name': 'University of Southampton', 'host_organization_lineage': ['https://openalex.org/I43439940'], 'host_organization_lineage_names': ['University of Southampton'], 'type': 'repository'}, 'license': 'cc-by-nc-nd', 'license_id': 'https://openalex.org/licenses/cc-by-nc-nd', 'version': 'acceptedVersion', 'is_accepted': True, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://eprints.soton.ac.uk/455667/1/APAC_2018_615.pdf', 'pdf_url': 'https://eprints.soton.ac.uk/455667/1/APAC_2018_615.pdf', 'source': {'id': 'https://openalex.org/S4306401019', 'display_name': 'ePrints Soton (University of Southampton)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I43439940', 'host_organization_name': 'University of Southampton', 'host_organization_lineage': ['https://openalex.org/I43439940'], 'host_organization_lineage_names': ['University of Southampton'], 'type': 'repository'}, 'license': 'cc-by-nc-nd', 'license_id': 'https://openalex.org/licenses/cc-by-nc-nd', 'version': 'acceptedVersion', 'is_accepted': True, 'is_published': False}, 'sustainable_development_goals': [], 'grants': [{'funder': 'https://openalex.org/F4320321114', 'funder_display_name': 'Bundesministerium für Bildung und Forschung', 'award_id': '03INT504AB'}, {'funder': 'https://openalex.org/F4320323803', 'funder_display_name': 'Bundesministerium für Wirtschaft und Energie', 'award_id': '20K1511D'}], 'datasets': [], 'versions': [], 'referenced_works_count': 18, 'referenced_works': ['https://openalex.org/W1983072340', 'https://openalex.org/W1984096792', 'https://openalex.org/W1988455001', 'https://openalex.org/W1988847854', 'https://openalex.org/W1996141579', 'https://openalex.org/W1996156355', 'https://openalex.org/W2024960421', 'https://openalex.org/W2025054145', 'https://openalex.org/W2078253912', 'https://openalex.org/W2089014696', 'https://openalex.org/W2516730735', 'https://openalex.org/W2569978183', 'https://openalex.org/W2761345737', 'https://openalex.org/W3104984234', 'https://openalex.org/W4237538994', 'https://openalex.org/W4241245600', 'https://openalex.org/W4293850344', 'https://openalex.org/W622103165'], 'related_works': ['https://openalex.org/W4387653525', 'https://openalex.org/W4386995796', 'https://openalex.org/W4386835200', 'https://openalex.org/W4241527569', 'https://openalex.org/W2898533975', 'https://openalex.org/W2745323733', 'https://openalex.org/W2638608834', 'https://openalex.org/W2088411976', 'https://openalex.org/W2066370402', 'https://openalex.org/W1966131443'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2898533975', 'counts_by_year': [{'year': 2024, 'cited_by_count': 4}, {'year': 2023, 'cited_by_count': 12}, {'year': 2022, 'cited_by_count': 5}, {'year': 2021, 'cited_by_count': 9}, {'year': 2020, 'cited_by_count': 3}, {'year': 2019, 'cited_by_count': 2}], 'updated_date': '2024-12-28T23:21:31.401823', 'created_date': '2018-11-02'}