What is antiresonance?

Antiresonance is a phenomenon that occurs in physical systems, where a system exhibits a low level of response or vibration at certain frequencies due to the presence of strong damping or impedance. This means that an external force applied to the system at these particular frequencies will have a minimal effect. Antiresonance is the opposite of resonance, where a system reacts strongly to an external force at a particular frequency. In electronic circuits, antiresonance can occur when a capacitor and an inductor are connected in parallel, forming a resonant circuit that exhibits low impedance at specific frequencies. Antiresonance can also occur in mechanical structures, such as bridges or buildings, where dampers or other energy-absorbing devices are used to mitigate the effects of strong vibrations caused by wind or seismic activity.