Resonators are devices that are designed to oscillate at specific frequencies in response to external stimuli, such as acoustic, mechanical, or electromagnetic waves. They are typically used in various applications including telecommunications, sensors, filters, and frequency synthesis. Resonators are important components in electronic circuits and systems for signal processing and communication. They can be designed as mechanical, acoustic, or electrical resonators, depending on the specific requirements of the application. Researchers in this area focus on developing novel resonator designs, improving their performance, and exploring new applications for resonators in various fields.