The piezoelectric effect is a phenomenon where certain materials generate an electric charge in response to applied mechanical stress. This means that when these materials are squeezed, twisted, or otherwise deformed, they produce a voltage. Common piezoelectric materials include quartz and certain ceramics, which are widely used in various applications. This effect is utilized in many devices, such as microphones, speakers, and sensors. For example, in a microphone, sound waves create vibrations that compress the piezoelectric material, generating an electrical signal that corresponds to the sound. This technology is essential in converting mechanical energy into electrical energy and vice versa.