{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,20]],"date-time":"2025-09-20T20:07:47Z","timestamp":1758398867796,"version":"3.40.4"},"reference-count":27,"publisher":"S. Karger AG","issue":"3","license":[{"start":{"date-parts":[[2017,1,1]],"date-time":"2017-01-01T00:00:00Z","timestamp":1483228800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2017,1,1]],"date-time":"2017-01-01T00:00:00Z","timestamp":1483228800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiology"],"published-print":{"date-parts":[[2017]]},"abstract":"<jats:p>&lt;b&gt;&lt;i&gt;Background:&lt;\/i&gt;&lt;\/b&gt; Auscultation is one of the basic techniques for the diagnosis of heart disease. However, the interpretation of heart sounds and murmurs is a highly subjective and difficult skill. &lt;b&gt;&lt;i&gt;Objectives:&lt;\/i&gt;&lt;\/b&gt; To assist the auscultation skill at the bedside, a handy phonocardiogram was developed using a smartphone (Samsung Galaxy J, Android OS 4.4.2) and an external microphone attached to a stethoscope. &lt;b&gt;&lt;i&gt;Methods and Results:&lt;\/i&gt;&lt;\/b&gt; The Android app used Java classes, \u201cAudioRecord,\u201d \u201cAudioTrack,\u201d and \u201cView,\u201d that recorded sounds, replayed sounds, and plotted sound waves, respectively. Sound waves were visualized in real-time, simultaneously replayed on the smartphone, and saved to WAV files. To confirm the availability of the app, 26 kinds of heart sounds and murmurs sounded on a human patient simulator were recorded using three different methods: a bell-type stethoscope, a diaphragm-type stethoscope, and a direct external microphone without a stethoscope. The recorded waveforms were subjectively confirmed and were found to be similar to the reference waveforms. &lt;b&gt;&lt;i&gt;Conclusions:&lt;\/i&gt;&lt;\/b&gt; The real-time visualization of the sound waves on the smartphone may help novices to readily recognize and learn to distinguish the various heart sounds and murmurs in real-time.<\/jats:p>","DOI":"10.1159\/000466683","type":"journal-article","created":{"date-parts":[[2017,4,25]],"date-time":"2017-04-25T21:01:49Z","timestamp":1493154109000},"page":"193-200","source":"Crossref","is-referenced-by-count":11,"title":["Development of a Smartphone App for Visualizing Heart Sounds and Murmurs"],"prefix":"10.1159","volume":"137","author":[{"given":"Noritaka","family":"Mamorita","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naoya","family":"Arisaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Risa","family":"Isonaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tadashi","family":"Kawakami","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akihiro","family":"Takeuchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2017,4,26]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1067\/mcd.2001.115501"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cpcardiol.2008.03.003"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM198806163182409"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2923.1991.tb00086.x"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-119-1-199307010-00009"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1997.03550090041030"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.4065\/80.11.1443"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1542\/peds.105.6.1184"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1001\/archinte.166.6.610"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1002\/clc.20213"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1159\/000177369"},{"key":"ref12"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijcard.2013.12.298"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1001\/archinte.154.8.893"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.3390\/s120810851"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1136\/pgmj.2003.014944"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1136\/hrt.2005.076315"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.5688\/aj7407132"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1961.73040300014012"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1378\/chest.126.2.470"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1002\/chp.21220"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1016\/j.amjcard.2013.02.041"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1109\/IEMBS.2009.5332544"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(10)62295-7"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.4187\/respcare.01072"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.3109\/03091902.2014.921253"},{"key":"ref27","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajem.2010.04.002"}],"container-title":["Cardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/466683","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/466683","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/466683","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,23]],"date-time":"2025-04-23T17:16:50Z","timestamp":1745428610000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000466683"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017]]},"references-count":27,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2017,6,7]]}},"URL":"https:\/\/doi.org\/10.1159\/000466683","archive":["Portico"],"relation":{},"ISSN":["0008-6312","1421-9751"],"issn-type":[{"type":"print","value":"0008-6312"},{"type":"electronic","value":"1421-9751"}],"subject":[],"published":{"date-parts":[[2017]]}}}