Mini-electret microphones are based on the principle of electrets, which are materials that have a permanent electric charge. The electret in a mini-electret microphone is typically a thin film of polymer that is charged during the manufacturing process. When sound waves hit the electret, they cause the charge to vibrate. This vibration generates an electrical signal that can be amplified and processed by electronic circuitry.
Non-returnable
Rs.20.00
