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How does a string telephone transmit sound?
Speaking into the cup creates sound waves which are converted into vibrations at the bottom of the cup. ... Landline telephones feature microphones that convert sound waves into electric currents that are then sent through wires and converted back into sound waves by an earphone inside the telephone at the other end.
Does talking through cup string 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. But as long as the string is tight, it works. It is also a great way to understand how telephones and radio work.
How does sound travel through a cup and string?
As the bottom of the cup vibrates, it transmits the vibrations into the taut string. The sound travels along the string as a longitudinal wave and ultimately vibrates the bottom of the receiving cup. The cup transmits the sound into the air around the listener's ear, allowing her to hear the speaker.
How does a cup and string telephone work?
How does the telephone work? (Example answer: When you speak into the cup, the back of the cup vibrates; the vibration extends into the string, like a push on a slinky; the sound waves, or vibrations, move through the string.)
What kind of string works best for CAN phones?
Although there are many different types of string available to the tin-can telephone engineer, a thick jute-like string is best for carrying messages over 30 feet or more.
How do you make a phone with cups and strings?
Thread one end of string through the bottom of each cup. Place a paperclip or toothpick in the bottom of each cup and tie the loose end of the string around it (the clip or pick is just here to keep the string from slipping through the bottom of the cup). Give one cup to your conversation partner and hold one yourself.
Does cup and string phone work?
A simple paper cup phone works by transmitting sound vibrations along a tightly-pulled string. The bottom of each cup serves as a combination "microphone" and "speaker," picking up sound vibrations on one and and reproducing the sound at the other.
How do you make a walkie talkie Cup?
Gather your materials. ... Poke the nail through the bottom of each can/cup. ... Thread one end of the string into one of the cans. ... Tie the string inside the receiver. ... Repeat steps 3 and 4 on the second receiver. ... Stretch the string out until it is taut. ... Talk to the person on the other end.
Do Cup phones actually work?
Effective Cup Phones You must pull the string taut in order for the phone to work. Longitudinal waves travel through a medium by a process of compression and rarefaction, which in this case alters the tension of the string. If the string is loose, the alterations in tension won't vibrate the listener's cup.
How far can a cup phone 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.
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