What is a Sound Powered Phone?
A sound powered phone is usually very similar in appearance to an old-style handset phone. It has a receiver and a transmitter and is hardwired into a network of other sound powered phone stations. Unlike cell phones or modern landline phones, sound powered phones do not rely on an electronic exchange to connect users to each other. This is because the sound powered phone is physically connected in an electronic circuit with one or more sound powered phones. The microphone of a sound powered phone often uses a flexible diaphragm that reacts to the pressure of sound waves created by the speaker. The motion of the diaphragm converts the pattern of sound waves into an electronic signal which is then converted back into sound by a reverse process in the receivers of all the other phones on the circuit. On a sound powered phone system, only one person can speak at a time or the signal will become hopelessly garbled. For this reason, most sound powered phones feature some kind of push-to-tal
