electret microphones

Electret microphones are a common type of microphone that convert sound into electrical signals. Inside, they contain a special material called an electret that holds a permanent electric charge. When sound waves hit a diaphragm attached to the electret, it vibrates and causes tiny changes in the electric field. These variations are then amplified and processed into audio signals. Electret microphones are compact, affordable, and reliable, making them ideal for many devices like phones, cameras, and microphones. Their ability to produce good sound quality in small sizes has made them a popular choice across various applications.