It's possible that you meant one of the following:
* Resonance: This refers to the phenomenon of a system vibrating at a greater amplitude when it is subjected to an external force that matches its natural frequency. It's a common concept in physics, music, and other fields.
* Consonance: This refers to the pleasing combination of sounds, usually in music or poetry. It is the opposite of dissonance.
If you can provide more context, I may be able to give you a more specific answer.