A microphone is a device which enables convert sound waves into electrical signals . In this way, he manages to amplify them.
These devices generate electrical currents based on changes in the Pressure of the air . To achieve this they can resort to different processes and techniques, such as electromagnetic induction wave piezoelectricity . Usually they should connect to a preamp so that its signal is able to be processed, recorded and reproduced in a talking (speaker ).
The membrane that captures the sound vibrations is called diaphragm . This diaphragm, which is protected by a grating , is connected to the system that converts sound waves into electricity. The microphone transducer is responsible for the transformation of sound into electrical signals, being called element or capsule .
When a person It speaks with a microphone, therefore, the sound waves it emits reach the diaphragm that is attached to the capsule, responsible for producing the amplifying electricity signals.
There are multiple kinds of microphones. The most common have a cable for their power supply and they are taken with one hand: thus, the user approaches his hand with the microphone to his mouth To speak or sing With this same format there are wireless microphones .
The lapel microphones On the other hand, they can be operated without using your hands. They get hooked on clothes or around the neck , always being close to the mouth.
In areas such as media , the telephony and the mass public events , the use of microphones is indispensable. This ensures the amplification of the sound .