How far can cup phones work?
Pull the string taut and have one person speak into one of the cups while you listen through the other. The cups can be used to communicate over distances of up to 100 feet.
Do cup and string phones actually work?
The old “two cans and a string” technique (or better yet, “two paper cups and a string”) really does work. The key is to make sure that the string is tight between the two cups, and this normally means that the distance is limited and the two people have to be connected to each other by a straight line.
How does sound travel through cup phones?
When you talk into the cup your voice sends sound waves inside the cup, vibrating the bottom of the cup. The vibrations are transferred to the string, across the string and into the bottom of the other cup. The sound waves become vibrations inside the second cup, transferring the sound of your voice.
Does the telephone cup work better when the string is tight or loose?
The string needs to be tight between the cups—a loose string will not transmit sound as well. If something is touching the string (ex. a finger, a wall, etc.), the phone won’t work as well.
What string is best for a cup and string phone?
String a piece of twine between the cups. Use a long piece of string to help the sound travel farther.
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You’ll need just a few things for this project:
- Styrofoam or paper cups.
- Cotton twine.
- Markers.
- Scissors.
How does sound travel through a cup and string?
When used properly, sound can travel down the string virtually without losses. Sound waves are compression, or longitudinal, waves. If one speaks into a cup, the sound waves of their voice vibrate the back of the cup, which propagates as longitudinal waves down the string to the other cup.
How do you make a good cup and string phone?
Make Your Own String Phone | One Stop Science Shop – YouTube
What string is best for a cup phone?
Does the length of string affect a string telephone?
Long string lengths allow vibrations to lose their energy before reaching the other end of the line. String types that dampen the vibrations will also reduce the function of the string telephone.
Do soup can telephones work?
Does TALKING through CANS and STRING WORK? – YouTube
How do you make a phone with two cups and a string?
How to Make a String Phone (In Two Minutes or Less) – YouTube
How can I make my string phone work better?
If the string is loose, the sound is less. This is because the lose string causes the vibrations to travel all around rather than directly down the string. Try experimenting with different lengths of string, types of string, and types of cups to see which produces the best sound over the longest distance.
How do you make a phone with a cup and string?
Can you use yarn for cup phones?
To make your own cup phones, use the tip of a pencil to poke a small hole at the bottom of each of your two cups. Next, thread the string through the hole of one cup. We just tied a knot in the yarn on the inside of the cup to keep it in place.
What string works best for tin can phone?
You will need 2 empty tin cans, a hammer, a nail or screw, masking or duct tape, and a long piece of cotton string or fishing line, about 10 to 30 feet in length.
Can you really talk with a cup and string?
Why do cup phones work?
When you make a string telephone, you talk into it causing the bottom of the cup to vibrate and that vibration travels along the string to the other cup where they can hear the sound of your voice coming out of their cup.
Can you use a plastic cup for a string telephone?
You can use the DIY string telephone to hear surprisingly far! Here are a few experiments for your kids to try: Use a plastic cup instead of a paper cup or vice versa.
What kind of string is best for cup phones?
What kind of string is best for tin can phone?
cotton string
You will need 2 empty tin cans, a hammer, a nail or screw, masking or duct tape, and a long piece of cotton string or fishing line, about 10 to 30 feet in length.
How do you make a string cup phone?