Short definition
A microphone is an electroacoustic transducer that converts sound waves into electrical signals. Event technology uses various types for speech, music, and conferencing — from handheld to boundary microphones.
Detailed explanation
Microphones differ by transducer principle, polar pattern, and application. The two main transducer types are dynamic microphones — rugged, level-tolerant coil-based transducers ideal for loud stage use — and condenser microphones, which offer a more sensitive, wider-bandwidth sound but require phantom power. Conference applications commonly use boundary and gooseneck condenser microphones.
Polar pattern determines which directions a mic picks up sound from: omnidirectional captures evenly from all directions, cardioid picks up mainly from the front, and supercardioid or hypercardioid offer even stronger directionality for loud stage environments. Choosing the right pattern is essential for feedback resistance. In practice, lavalier mics, headset mics, handheld mics, and boundary mics are the most important types.
Relevance in this field
The microphone is the first link in the audio chain — mistakes made here are nearly impossible to correct further down the signal path. Choosing the right one is fundamental to professional audio results.
Practical example
At a panel discussion with five participants, cardioid lavalier microphones are used on each speaker. A gooseneck condenser microphone sits at the moderator's podium; all signals feed into a digital mixing console.
Related terms
Wireless microphone, mixing console, sound engineering