What is the purpose of a mic check 1 2 and how does it ensure that the audio equipment is functioning properly before an event?

A mic check 1 2 is a test to ensure that the microphone and audio equipment are working correctly before an event. By speaking into the microphone and saying "mic check 1 2," the sound technician can check if the microphone is picking up sound and if the audio levels are balanced. This helps prevent technical issues during the event and ensures that the audience can hear the speakers clearly.