{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,12]],"date-time":"2026-04-12T03:04:25Z","timestamp":1775963065805,"version":"3.50.1"},"reference-count":6,"publisher":"American Association of Physics Teachers (AAPT)","issue":"7","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2008,10,1]]},"abstract":"<jats:p>Most homes in developed countries have a sophisticated data acquisition board, namely the PC sound board. Designed to be able to reproduce CD-quality stereo sound, it must have a sampling rate of at least 44 kHz and have very accurate timing between the two stereo channels. With a very simple adaptation of a pair of regular PC microphones, a computer with a stereo sound board, and sound analysis software, we were able to implement a method of accurate measurement of the speed of sound with several attractive features: a) The most expensive equipment, the PC, the sound board, and sound analysis software, are available in many homes and almost all schools; the two microphones and the additional electronics (see below) can be acquired for less than $50. b) The concept of the experiment is sufficiently simple to be grasped by very young students, 13\u201314 years old. c) The experiment itself is so straightforward that in a recent Open Day at our department, every group of students passing through the experiment was able to complete, in a couple of minutes, several measurements of cs, the speed of sound in air. d) It is possible to use the same apparatus to measure the speed of sound in solids.<\/jats:p>","DOI":"10.1119\/1.2981293","type":"journal-article","created":{"date-parts":[[2008,9,5]],"date-time":"2008-09-05T22:44:59Z","timestamp":1220654699000},"page":"428-431","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":12,"title":["A Time-of-Flight Method To Measure the Speed of Sound Using a Stereo Sound Card"],"prefix":"10.1119","volume":"46","author":[{"given":"Carlos C.","family":"Carvalho","sequence":"first","affiliation":[{"name":"E.S. Garcia de Orta, Porto, Portugal"}]},{"given":"J. M. B.","family":"Lopes dos Santos","sequence":"additional","affiliation":[{"name":"Faculdade de Ci\u00eancias Universidade do Porto, Porto, Portugal"}]},{"given":"M. B.","family":"Marques","sequence":"additional","affiliation":[{"name":"Faculdade de Ci\u00eancias Universidade do Porto, Porto, Portugal"}]}],"member":"3","published-online":{"date-parts":[[2008,9,5]]},"reference":[{"key":"2023062914443809100_r1","doi-asserted-by":"crossref","first-page":"424","DOI":"10.1119\/1.1416315","article-title":"Measuring the speed of sound: Variation on a familiar theme","volume":"39","year":"2001","journal-title":"Phys. Teach."},{"key":"2023062914443809100_r2","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1119\/1.1888080","article-title":"The speed of sound in air: An at-home experiment","volume":"43","year":"2005","journal-title":"Phys. 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