A time of flight method to measure the speed of sound using a stereo sound card by Carlos C. Carvalho and others Created 2026-10-13 Updated 2026-11-05
View more
Publisher: arXiv (preprint host).
Cited passages: Apparatus, PDF page 2, sample interval; Results, PDF page 3, short-delay and reflection limitations for solid samples; Principle and Apparatus, PDF pages 1–2, Figures 1–2; Results, PDF pages 2–3, Figure 3.
Read the full article
João M. B. Lopes dos Santos Created 2026-10-13 Updated 2026-11-05
View more
João M. B. Lopes dos Santos coauthored an inexpensive speed of sound experiment using two microphones and a computer's stereo sound input. A pulse reaches microphones at different distances at different times; dividing the path difference by the arrival-time difference estimates the propagation speed. Recording both channels together makes the relative delay directly accessible. The apparatus turns wave propagation into a quantitative measurement using familiar audio equipment.[ref]
Figure 1.
Portrait of João M. B. Lopes dos Santos
. SICC/RS (credit printed beneath the source photograph). External portrait hosted by University of Porto, Faculty of Sciences. Source credit: SICC/RS. Source.
Read the full article