MX-5 mk1 NA 1.8 chirping

[Skyscooter1]

My 1996 Mazda MX-5 NA 1.8 produces a chirping noise from the radio speakers when I turn off the engine.

Can anybody give me any advice I'm assuming it's a notification of something needing attention I'm suspecting the immobilized maybe a battery somewhere needs changed?

Thanks guys
Robbie