Interference
Interference (noun) /ˌɪn.təˈfɪə.rənts/ US /-ţɚˈfɪr.ənts/
1. any deliberate obstruction that is intended to prevent the progress of something – hindrance:
She was so determined to become a teacher instead of a doctor that she regarded any advice from her parents as interference.
2. any unwanted electronic signal that is intended to prevent you from receiving good pictures and sound on a radio or television on air.