Sound Penetration into Rough Water

Overview

Objectives/Goals The objective of this project is to determine if more sound will enter a rough water surface than a flat water surface. Methods/Materials A sound blocking disk and a sound directing tube were used to control sound. A pool, two laptops, a speaker, a hydrophone and a fan were used in the apparatus. For each setting, the disk was moved up gradually or the tube moved to a larger angle. This was repeated with 4 different wind speeds created by the fan, 0 knots, 17 knots, 27 knots, and 37 knots. Results When after 13 degrees, the angle at which no sound should penetrate the water, it was seen that the level of fan corresponded with the level of sound. The highest fan setting had the highest level of sound from the specified signal sent out by the speaker, and so on for the low and medium wind speeds. Conclusions/Discussion In both methods, evidence was found that supported the hypothesis, that sound would penetrate at approximately 27 degrees. In each setting, most of the data stayed generally the same with few outliers, although there was variation due to the possibility of sound diffraction. Sound levels with the fan, were higher than without the fan.

Competition history

• CSEF 2014 Physics & Astronomy · Entry J1812

Resources

• CSEF project summary ↗

Related projects

Closest projects by meaning, across every fair and year in the corpus.

Browse more like this

• All Physics and Astronomy projects
• CSEF Physics and Astronomy projects
• Every CSEF 2014 project