Step 1. 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.
What kind of string do you use for a tin can phone?
Step 1. 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.
Does the can on a string 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.
Can string can phone?
A tin can telephone is a type of acoustic (non-electrical) speech-transmitting device made up of
two
tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire.
How long can a tin can phone be?
The longest functioning tin can telephone is
242.62 m (796 ft)
, and was achieved by Puzz Lab Inc., SUSUMU Inc., Gakken Plus Co. Ltd., Roy Hobbs Inc. and Hirofumi Yumoto (all Japan) in Chosei, Chiba, Japan, on 17 August 2019. They were not only successful but also the very first holder of this record title.
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.
How far can a string phone work?
Making a Paper Cup Phone
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 can phones actually work?
How Do Tin Can Phones Work? Talking causes little vibrations in the air in front of your mouth, as you can tell by speaking into your hand. When you send those vibrations into the can, they
cause the back end to vibrate
. This vibration is passed along the string and into the other can.
Why is it that you hear better if the string is tighter?
If the string is kept tight,
the sound waves will travel
. 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.
Who invented telephone?
Alexander Graham Bell
is often credited with being the inventor of the telephone since he was awarded the first successful patent. However, there were many other inventors such as Elisha Gray and Antonio Meucci who also developed a talking telegraph.
What is the longest string phone?
The Guinness Book of World Records says the worlds longest FUNCTIONING tin can phone was made in Japan in August 2019. It went 242.626 meters, or
796 feet
!
What is the source of sound in the tin can telephone?
The
sound pressure from the speaker's mouth
exerts a force on the bottom of the can. This force excites a transverse flexural wave on the bottom of the can and causes it to vibrate back and forth. 2. The vibration from the bottom of the can is transmitted down the taut string as a compressional wave.
Can sound travel in thread also?
Sound | Short/Long Answer Questions
Make a small hole at the bottom of each cup and pass a long thread through them. … This shows that sound travels through the thread and reaches your ear. Thus,
sound can travel through a solid
.
