A resonator is a device or system that enhances or amplifies sound by vibrating at specific frequencies. It can be found in various musical instruments, such as guitars and violins, where it helps produce richer tones. Resonators work by capturing sound waves and reinforcing certain frequencies, making the sound louder and more vibrant. In addition to musical applications, resonators are also used in technology, such as in radio transmitters and lasers. These devices utilize resonators to control and stabilize frequencies, ensuring clear signals and efficient operation. Overall, resonators play a crucial role in both music and modern technology.