String Telephone Cups Data Sheet

Sound - String telephone data sheet

What are the two thing that made the sound travel well in this experiment?

The string has to be pulled tight so the string can vibrate so that the air molecules can move to your ear.  

You have to put a small hole at the bottom

Why did the sound travel well in each case?

Because the string vibrated which means that the air molecules moved and went into our ear.

What are the two thing that made the sound travel poorly in this experiment?

If you did a big hole the string wouldn't vibrate properly. If the string wasn’t pulled tightly then it couldn’t vibrate too.

Why did the sounds travel poorly in each case?

The thicker the string the better the sound. If you have a long as as as as  string and it is pulled tight you will still be able to hear each other.

How do sounds travel from one cup to another?

Here is why it works. When one person talks into his/her cup, the bottom of the cup vibrates back and forth with the sound waves. Imagine the bottom of the cup moving back and forth very quickly (1,000 times per second or more) with the sound waves of the speaker's voice. The vibrations travel through the string by pulling the string back and forth. Therefore, the bottom of the second cup should start to vibrate back and forth just like the bottom of the first cup is vibrating, producing sound waves. The second person can hear the sound waves and can therefore hear what the first person says.