{"doi":"10.1121/1.417065","title":"Optimum gains of a delay-and-sum microphone array for the near sound field","abstract":"<jats:p>The optimum gains of a delay-and-sum microphone array for the near sound field, where the sound waves are spherical, have been investigated. The optimum gains give the highest signal-to-noise ratio in a sound field with background noise, and they give constant sensitivity to the sound source at every focal point. The optimum gains were theoretically derived as gi=C/ri, where ri represents the distance between the array focal point and the ith microphone element and C represents the normalizing parameter that keeps the sound source sensitivity constant, independent of the focal point. Parameter C is a function of ri and rc, where rc is the critical distance of the reverberant room. The results of computer simulation and indoor experiments (room volume: 83 m3, reverberation time: 0.2 s) showed a good array sensitivity distribution and power distribution estimation when each gain was optimized.</jats:p>","journal":"The Journal of the Acoustical Society of America","year":1996,"id":38448,"datarank":1.4952910328217695,"base_score":1.791759469228055,"endowment":1.791759469228055,"self_citation_contribution":0.26876392038420827,"citation_network_contribution":1.2265271124375612,"self_endowment_contribution":0.26876392038420827,"citer_contribution":1.2265271124375612,"corpus_percentile":null,"corpus_rank":null,"citation_count":5,"citer_count":4,"citers_with_citation_signal":4,"citers_with_endowment":4,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":190710,"name":"Yutaka Kaneda","orcid":null,"position":1,"is_corresponding":false},{"id":190711,"name":"Junji Kojima","orcid":null,"position":2,"is_corresponding":false},{"id":190709,"name":"Hiroaki Nomura","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":1.791759469228055,"endowment":1.791759469228055,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"18998881","pmcid":null,"openalex_id":"https://openalex.org/W2067276344","authors":[],"funders":[],"total_grants":0,"fwci":0.0,"citation_percentile":0.22640931,"influential_citations":0,"citation_trend":[],"oa_status":"closed","license":null,"oa_locations":[{"url":"https://pubs.aip.org/jasa/article/100/4_Supplement/2697/895296/Optimum-gains-of-a-delay-and-sum-microphone-array","host_type":"publisher"},{"url":"https://doi.org/10.1121/1.417065","host_type":"journal"}],"fields_of_study":["Speech and Audio Processing","Acoustic Wave Phenomena Research","Hearing Loss and Rehabilitation","Physics","Engineering"],"mesh_terms":[],"keywords":["Acoustics","Microphone","Microphone array","Sound (geography)","Field (mathematics)","Computer science","Mathematics","Physics","Sound pressure"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Affordable and clean energy"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-11T03:29:58.305901Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}