관 안에서의 압력과 진동수의 관계 물리 실험 보고서

소개글

Ⅰ. Introduction
Fig.1 Performance group Noridan We have already performed experiment about sound; wave on a string, sound in a tube. Especially, in the wave on a string experiment, we measured frequency of stand wave for some variables. For example, we changed string type, mass of valance and number of segment to find out relationship between frequency and linear density, segment and tension.
We saw an article about performance group `Noridan`, play music with PET bottles. They hit the PET bottle and change the tone with pressure in the bottle. Like this, we make an assumption that PET bottle can make a sound, in detail, PET Bottle might act like string. Since we could not change number of segment or hard to try for different kinds of bottle, we just measure the frequency according to tension controlled by pressure with assumption that pressure would directly proportional to the tension. Ultimately, we figured out the relation between pressure and frequency in a bottle.

목차

1. Introduction
2. Theoretical Bias
3. Experimental techniques and method
4. Experimental data and analysis
5. Conclusion
6. References

본문내용

Ⅰ. Introduction
Fig.1 Performance group Noridan
We have already performed experiment about sound; wave on a string, sound in a tube. Especially, in the wave on a string experiment, we measured frequency of stand wave for some variables. For example, we changed string type, mass of valance and number of segment to find out relationship between frequency and linear density, segment and tension.
We saw an article about performance group `Noridan`, play music with PET bottles. They hit the PET bottle and change the tone with pressure in the bottle. Like this, we make an assumption that PET bottle can make a sound, in detail, PET Bottle might act like string. Since we could not change number of segment or hard to try for different kinds of bottle, we just measure the frequency according to tension controlled by pressure with assumption that pressure would directly proportional to the tension. Ultimately, we figured out the relation between pressure and frequency in a bottle.


Ⅱ. Theoretical Basis
■ Relation ship between tension and pressure
We assumed that tension is directly proportional to pressure because of following speculation.
1) Volume approximation
The tension along the PET is caused by stress, and we know stress is modulus times strain. Therefore, we can rewrite the tension again.
Tension = = Stress = Modulus X Strain().
If we assume the PET as a cubic, we can calculate mathmatically.

참고 자료

1) Fundamental of Physics by Halliday/Resnick/Walke
2) Wikipedia