Alpha science class：How to make a voice phone

Have you ever tried to talk to a friend who is far away in life? In the case of a long distance, it is difficult to hear the other person's conversation without shouting loudly. The earliest invented telephone was to transmit our words to the distance through wires. So, do children understand the principle of wired telephones? Today Alpha science toys and children make a simple voice phone at home to help children understand the scientific principles of phone.

 Alpha science class：Materials needed to make a voice call

1. Two disposable paper cups

a 10 to 30 cotton thread

2. Paper clip

3. Two easy-pull pieces

Alpha science class：Voice phone making steps

First step:

Children need to straighten the paper clip and make a small hole in the bottom of each paper cup.

Second step:

The children threaded the ends of cotton thread through the bottom of two cups and tied two easy-pull pieces at each end.

Third step:

The simple voice call made by the children is completed, call your little friends, each holding a cup, away from each other, straighten the cotton thread, one person speaks and the other listens, complete the dialogue with each other, this is the most original phone.

Alpha science toys tips：

The children must tighten the rope between the two cups, and the rope can not touch other objects, otherwise it will affect the sound transmission of voice call!

Alpha science class：The scientific principle of voice phone

Alpha science toys tells children that our ears can hear sound because sounding object keeps vibrating, and then air vibrates, and then passes to our ears to vibrate our eardrum so that we can hear sound.

Children speak into cup and produce tiny sound waves that turn into vibrations at the bottom of cup. Sound from paper cup is transmitted through vibrating cotton thread and converted into an echo wave at the other end, so that your little friend can hear what you are saying.  Sound travels through air, but it spreads better through solids such as cups and cotton, allowing children to hear sounds that are not too far away. Do children understand the scientific principles? Then make more voice phones with your friends and talk to more friends!

If children want to learn more interesting scientific knowledge, look for more magical science mysteries in Alpha science toys' Recyclable Science toyset!