Two or more strong signals mix in your receiver to produce interference on a desired frequency. What is this called?

Intermodulation interference is created when two or more strong RF signals enter a receiver and interact within its non-linear components, such as a mixer or an RF amplifier. This interaction spawns artificial signals at mathematical combinations of the original frequencies. If one of these newly generated frequencies lands exactly on the frequency you are trying to listen to, you will hear the mixed interference. This is a very common issue in RF-dense environments like commercial radio transmitter sites. It is important to distinguish this from front-end desensitization, which happens when a strong signal simply deafens the receiver without necessarily creating new mixing products. Capture effect is also incorrect, as that refers to an FM receiver locking onto the stronger of two signals on the exact same frequency.