
Examining these steady state solutions as a function of driving frequency, it is evident that both oscillators display resonances (peaks in amplitude accompanied by positive phase shifts) at the two normal mode frequencies. In addition, the driven oscillator displays a pronounced dip in amplitude between the normal modes which is accompanied by a ...
Found on
http://en.wikipedia.org/wiki/Antiresonance

a phenomenon in an electric, acoustic, or other such system in which the impedance is tending to infinity.
Found on
https://www.infoplease.com/dictionary/antiresonance
No exact match found.