| Title: |
Simple Time-of-Flight Measurement of the Speed of Sound Using Smartphones |
| Language: |
English |
| Authors: |
Staacks, Sebastian; Hütz, Simon; Heinke, Heidrun; Stampfer, Christoph |
| Source: |
Physics Teacher. Feb 2019 57(2):112-113. |
| Availability: |
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte |
| Peer Reviewed: |
Y |
| Page Count: |
2 |
| Publication Date: |
2019 |
| Intended Audience: |
Teachers |
| Document Type: |
Journal Articles; Reports - Descriptive |
| Descriptors: |
Measurement; Acoustics; Audio Equipment; Telecommunications; Handheld Devices; Physics; Science Instruction; Teaching Methods; Science Experiments; Student Motivation |
| DOI: |
10.1119/1.5088474 |
| ISSN: |
0031-921X |
| Abstract: |
We propose an easy experiment that allows students to determine the speed of sound through a simple time-of-flight measurement using two smartphones. The concept of using the sensors in mobile phones for physics experiments has become a well-known option for science teachers. Since these devices are readily available to most students and teachers, experiments can be set up at little to no cost while generating fascination and motivation for the students thanks to the novelty of using their own devices in an unusual way. From all the sensors available in modern phones, the microphone offers the best temporal resolution by a huge margin as it records samples at a rate of (typically) 48 kHz. As this fast sampling rate is a requirement for high-quality audio recordings, it has been around long before smartphones offered other sensors, and audio inputs have already been used for experiments on soundcards in desktop computers. |
| Abstractor: |
As Provided |
| Entry Date: |
2019 |
| Accession Number: |
EJ1203648 |
| Database: |
ERIC |