We decided to do a speaker for our project, a speaker works by the device in our case a phone sending electrical signals at different frequencies. The electromagnet uses these signals to adjust its magnetic field based on those frequencies. The electromagnet vibrates the magnet inside of the tube and hits the diaphragm and this is what makes the sound just the vibrations in the air. The speaker uses magnetism to make the vibrations which hit the diaphragm producing the sound. The electric frequencies which travel thru the magnet wire which is the conductors that when electricity flows through it creating a magnetic field. However this magnetic field is really weak and is amplified by the could (more magnet wire in a certain amount of space.