Telephoning with hoses
Two people each take one side of the hose in their hands and try to transmit messages to each other, just as they do on the phone. One has to speak into the tube while the partner holds the other tube opening close to the ear and receives the message.
Further informationson the exhibit "Telephoning with hoses"
With every sound we make, a sound wave is emitted, which is transmitted via air and can be heard again by a receiver.
As a rule, sound travels symmetrically in all directions away from the source in a homogeneous sound-conducting medium.
In this case, however, it is guided through the tube only in one direction, i.e. directly to the listener. At up to 343 metres per second, the sound waves arrive at our partner and we succeed in communicating via the tubes.