Radio help

[nikkiy9]

when the car is stationary, the radio works brilliantly, yet when i am just say rolling i keep getting an intermittent pip, but the faster i go the more the pips happen, i know it's nothing to do with the dizzy as it doesn's happen when i rev,

i'm thinking wheel speed sensor or something along them lines,

[nikkiy9]

this is now sorted, the radio was to blame