Simple Speaker

      Apparatus

·         Can

·         Nail and hammer

·         duct tape

·         Cartoon papper

·         Mp3 player or Hp.

     Hypothesis

        The bigger can caused greater area contact with the air can produce a more intense sound wave.

How to make:

1.    Find a can like coca - cola’s or sprite’s or other type. Rinse the can, make sure it dried inside and outside.

2.    Make holes in the bottom part of can using nail and hammer about 9 – 12 holes.

3.    Cut the top side of can so you can put your phone into it, for safety you can cover the round side of can with cartoon paper

4.    Use paper clip that stick on the paper carton to make can stand horizontally

5.    Put your phone into the can and play the music player. Then you can cover the top of the can using cartoon paper  or plastic.

                                      1.

                                  2. 

                                                    

                                              3. 

                                              4. 

                                               5. 

    Variable of Experiment

  Independent variable : ………………….

         Answer:  the size of can

Dependent variable : …………………..

Answer: the loudness of the sound.

 Control variable : ………………………

Answer: air surrounding, sound source.

8.         Observation and Measurement Result:

No.	Size of can	The loudness
		Louder	Less loud
1.	Big
2.	Small

9.         Conclusion:

Question:

1.       What factors caused sound occurred?

2.       What can make sound louder when we put the earphone into the can?

3.       Relate the conclusion of your experiment with properties of wave (energy transport and amplitude)!