Where did the loudspeaker come from?
In 1874 Ernst W. Siemens first described the phenomena of the dynamic moving-coil transducer. But it was Alexander Graham Bell (the inventor of the telephone) who first patented it and put it to use. Yes that’s right. Telephones were the first use of speakers ever. After this discovery many patents and improvements on the technology set the groundwork for what we use speakers for today. What are speakers made of? The primary piece that takes up the most space is the diaphragm. The diaphragm is the cone part of the speaker that is easily viewed from the outside. The cone holds a wire that is in a magnetic field. Now here’s where you might lose me so pay attention. The magnetic field is made when an electrical current is sent through the wire. This magnetic field causes the magnetic system inside the diaphragm to move back and forth. When more or less electrical signal is sent through the wire the farther away and back the vibrations are, creating higher or lower pitches. To keep the dia
