Unlike our ears, the microphone can only accurately convert (and reproduce) sound signals in a specific range, usually this range is smaller than 20-20kHz.
If the microphone can be within a certain range, no increase or decrease the volume of reproduced frequency, we call this variable frequency range is "flat." When measuring a microphone, this item is called "frequency response”.For an engineer, this is a feature that must be known when selecting a microphone for a particular usage scenario.
Another feature to be aware of when selecting a microphone is the signal-to-noise ratio (S/N), which represents the ratio of the useful audio volume (S) from the instrument and singer to the noise (N) of the microphone itself.
However, when choosing a microphone, the most important consideration is the type of design. There are currently two basic microphone types: dynamic microphone and condenser microphone.
Although dynamic microphones have always been the first choice for live sound reinforcement engineers, condenser microphones are gradually appearing on the stage of live sound reinforcement. For this reason, we will explain later.