A microphone is a device that converts sound into an electrical signal. Microphones are used in a wide variety of applications, including sound recording, public address systems, and telecommunications. The best microphone for a particular application will depend on a number of factors, including the type of sound being recorded, the desired sound quality, and the budget.
Microphones that cost less than $50 are typically designed for basic applications, such as recording voice or music for podcasts or home videos. These microphones are typically not as sensitive or durable as more expensive microphones, but they can still produce good sound quality.