On the other side, speaker needs huge current with large amplitude to produce enough movement and to generate the audible loud sound. The electrical output across the microphone provides a tiny amount of current which is too small to do something useful out of it and the amplitude is also low. It is true that the microphone produces electrical energy but it is not sufficient to drive the huge load, that is speaker. So can we directly connect the microphone with the speaker? Like the image below? We know that a speaker converts Electrical energy into mechanical energy and produce a sound wave, and we also know that, the microphone does exactly opposite thing which produces electrical wave from the sound signal. Most common types are Dynamic Microphones, Condenser Microphone, Piezo electrical microphone etc.Ī condenser microphone uses a diaphragm which vibrates and used as a capacitor plate to produce electrical signal variations, whereas dynamic microphones are use moving coils to change a magnetic field and produce the electrical signal.

Depending on this component and the method to convert the sound wave into Electrical signal, there are various type microphones are available in the electronics and sound engineering field. A microphone has a sensitive component which converts the air pressure variations created by the sound wave into electrical signal.

Use speaker as microphone