{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282679397453952.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5701/jjpp.4.18"}},{"identifier":{"@type":"NAID","@value":"130001998892"}},{"identifier":{"@type":"URI","@value":"https://search.jamas.or.jp/link/ui/1994016548"}}],"dc:title":[{"@language":"en","@value":"Frequency Spectral Analysis of Breath Sounds in Newborn Infants"},{"@value":"新生児呼吸音の音響学的解析"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"To assess the auscultative changes of breath sounds in various age groups, we compared the characteristics of breath sounds in normal newborn infants to older children by means of frequency spectral analysis.<BR>Our subjectswerefull-term infants within 7 days of age (n=55), and children age 10 months to 14 years (n=21). Breath sounds were recorded simultaneously via a microphone attached to the chest and impedance pneumography. Sound signals were band-passed from 100 to 1000Hz and analyzed using the fast Fourier transform (FFT). Peak frequency (PF) of the spectra of breath sounds was significantly higher in newborns than in older children (p<0.001), and the decline of the power spectra (SLOPE) from PF was not significantly different between three groups. However, SLOPE demonstrated linear correlation with PF both in newborns and in older children respectively. This study suggests that the difference of lung sounds between newborn infants and older children is considered to be originated from their sound source rather than from their transmission effect."},{"@value":"マイクロホンを用いた体表面からの呼吸音計測という非侵襲的な音響学的方法により, 新生児呼吸適応時期の呼吸音の変化を客観的に評価, 検討する目的で, 健常新生児を対象に, 新生児期以後の健常小児を対照として肺胞呼吸音の周波数分析を行った。<BR>聴診上新生児期の呼吸音は, より年長児あるいは成人のそれと比較して鋭利で高いピッチの音として聴取される。この呼吸音を高速フーリエ変換により周波数分析した結果, 新生児期の肺胞呼吸音の最大周波数 (PF) は, 身長, 体重, 胸囲といった体格的なパラメータとの間に相関はみられなかったが, 生後10ヵ月以降の乳幼児や年長児と比較すると有意に高く, また出生直後ではPFはさらに高値を示した。これは新生児期の肺の生理的状態により, 呼吸音の音源がより中枢側で気管・気管支呼吸音に近いことが考えられた。<BR>また, 肺の高域減衰効果すなわちSLOPEは, 新生児と対照小児との問に有意差はみられなかった。一方PFとSLOPEとの相関をみると新生児・対照小児ともそれぞれ有意な正相関を示した。このことからSLOPEは年齢によって変化せず, 気流速度や音源との距離胸壁の厚さなどの音響伝達要素よりも, 音源自体の性質による影響が大きいものと考えられた。"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410290696318780544","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000021473637"}],"foaf:name":[{"@language":"en","@value":"Imai T."},{"@language":"ja","@value":"今井 大洋"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Pediatrics. Nippon Medical School"},{"@language":"ja","@value":"日本医科大学小児科"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"09183876"},{"@type":"EISSN","@value":"21853754"}],"prism:publicationName":[{"@language":"en","@value":"Japanese Journal of Pediatric Pulmonology"},{"@language":"ja","@value":"日本小児呼吸器疾患学会雑誌"},{"@language":"en","@value":"JJPP"},{"@language":"ja","@value":"日小呼誌"}],"dc:publisher":[{"@language":"en","@value":"Japanese Society of Pediatric Pulmonology"},{"@language":"ja","@value":"日本小児呼吸器疾患学会"}],"prism:publicationDate":"1993","prism:volume":"4","prism:number":"1","prism:startingPage":"18","prism:endingPage":"27"},"reviewed":"false","url":[{"@id":"https://search.jamas.or.jp/link/ui/1994016548"}],"availableAt":"1993","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=%E6%96%B0%E7%94%9F%E5%85%90","dc:title":"新生児"},{"@id":"https://cir.nii.ac.jp/all?q=%E8%82%BA%20(%E8%83%9E%E5%91%BC%E5%90%B8)%20%E9%9F%B3","dc:title":"肺 (胞呼吸) 音"},{"@id":"https://cir.nii.ac.jp/all?q=%E9%AB%98%E9%80%9F%E3%83%95%E3%83%BC%E3%83%AA%E3%82%A8%E5%A4%89%E6%8F%9B","dc:title":"高速フーリエ変換"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%91%A8%E6%B3%A2%E6%95%B0%E5%88%86%E6%9E%90","dc:title":"周波数分析"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390001204420946176","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Acoustic analysis of respiratory sounds and airway stricture."},{"@value":"呼吸音の音響学的解析と気道狭窄"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0038818104"},{"@type":"CROSSREF","@value":"10.5701/jjpp.4.18"},{"@type":"CIA","@value":"130001998892"}]}