You will need two tin cans and some string. Punch a small hole in the center bottom of each can, and run the string through each hole and tie a know on each end. Position the two cans so that the string between them it taught ... the voice will resonate inside the can and transmit that across the taught string and into the other can. One talks into the can and the listener puts the other can up to their ear.
If someone were to touch the string part way along, their finger would dampen the waves travelling along the string.
This question is very simple to answer. over centuries people have questioned this so called telephone.I however have an answer. Some people believe that the vibrations carried down the string actually allow the string to carry sound. However this is not entirely true. The actually vibrations are so minute that if they did indeed carry enough vibrations all you would hear would be a jumble of sounds.However the reason people do believe this mechanism works is because as you talk into the can it sounds as if it is being amplified. This is not true because as we know thanks to many scientific laws it is impossible to increase the volume of sound without an electronic device. The hollow sound heard when talking into a can is in fact just the air being pushed in steams in and out of the can. So in conclusion the answer is a no.
Sound is really vibration. The can at one end vibrates under the effect of the sound leaving your mouth and transfers some of that vibrational energy to the string which in turn transfers some to the can at the other end, which vibrates some of the air molecules and finally they vibrate your eardrum.
I would say that plastic cups are better for string telephones because you cant get string through a metal cup.
Any kind i think!
NO!
YES!!! When the string is taut. Boy Scout string phone. Two tin cans. Take the lid of one end , and punch a small hole in the opposite end. Take your length of string , say 5m ( 15 ftt). String each end of the two tin cans and place a knot in the string so it will not fall/pull out. Each of two people to take one stringed can . Move as far apart as the string will allow to be taut. One person to place the can to his ear, and the other person to speak into the other tin can . 'Can you hear me!!!! '
erm . . . don't think so . . . lol . . . i think thinner is better though so the sound waves can travel threw x lol x
yes it does work but it wont with threading string.
One thing secretaries do at work at answer telephones. They also type of letters and send out emails for the boss.
Telephones'
Magnets are used in telephones' speakers to make vibrations of air (sounds)
The string on a sundial should run north to south for the sundial to work properly and accurately track the time using the shadow cast by the sun.
Telephones were invented in 1876. No major milestone in telephones happened in 2000.
Yes land line telephones do work if even if there is a power cut. if it is a cordless phone. They need electrical power to transmit from the base to the handset.