Velocity of Sound

2256 words 10 pages
Experiment 7: Velocity of Sound

Jaybee J. Balilea, Sharmaine O. Baysic, Maria Anjelette Patricia C. Belen, Dianne Grace D. Bolloso

Department of Biological Sciences
College of Science, University of Santo Tomas
Espana, Manila

Abstract
Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard. It is produced when something vibrates causing its the medium (water, air, etc.) around it to vibrate as well. In common everyday speech, speed of sound refers to the speed of sound waves in air. Sound travels faster in liquids and non-porous solids than it does in air. In this experiment, velocity of
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It shows the calculated wavelengths of sound produced in the first activity. Two tuning forks with frequency of 341.3 Hz and 384.0 Hz, a rubber mallet and a resonance tube were used in this activity. Each tuning fork was struck with a rubber mallet which made the tuning fork to vibrate and produced a sound in the resonance tube. In this activity, there were three trials for each turning fork. The computed average wavelength for the tuning fork with 341.3 Hz was 0.973 m and for the tuning fork with 384.0 Hz, 0.854m. The computed diameter of the resonance tube was 0.346m. The calculated percent errors which were 4.4% for the first tuning fork and 5.6% for the second tuning fork were quite large probably because of some errors in the computations and measurements. The environment where the activity took place could also be a factor because members of the group were somehow had difficulty in listening to the sound produced by the vibrating tuning fork and the resonance tube because of some unpleasant sounds in the surrounding.

Table 2. Speed of Sound
Trial Total Travel Time
1 .00274s
2 .00248s
3 .00246s
Average

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