In this science project, a student chose to test students' ability to hear sound in different ranges of pitch.
Question
What group of frequencies do teenagers hear best?
Independent variable
Frequency played
Dependent variable
Reactions of teenagers tested
Constants
- Same volume
- Same notetakers and sounds
- Same distance of speaker from person
Hypothesis
Teenagers would hear the high frequencies best.
Results
All of the subjects heard the high frequencies best.
Conclusion
All of the teenagers heard the high frequencies because the high frequencies played the loudest through the headphones.
Experimental Error
I think that it was a little unfair, but I don’t think that there was anything that I could have done about it. The frequencies were so loud that people that weren’t wearing the headphones could hear them.