A resonator stores oscillatory energy in one or more normal modes. Driving near a mode's frequency can produce resonance. Losses limit the response and determine its quality factor. After the drive is removed, an isolated weakly damped mode decays approximately exponentially; an observed room response may combine many modes.
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The term "resonator" can refer to different concepts depending on the context: 1. **Physics and Engineering**: In a general sense, a resonator is a system that naturally oscillates at particular frequencies, known as resonance frequencies. This can occur in mechanical systems, electrical circuits, or acoustic systems. Examples include: - **Mechanical Resonators**: Such as a tuning fork or a guitar string, which vibrate at certain frequencies.