How do you fix a hum in the rear wireless headphones of a 2002 Honda Odyssey usually 20 minutes after the engine is on and quiets once the engine is off?

A hum in the rear wireless headphones of a 2002 Honda Odyssey, which occurs after the engine is on, may be caused by electrical interference from the vehicle's engine or alternator. To fix this, try relocating the headphones or their transmitter to minimize interference. Additionally, ensure that all connections are secure and consider using a noise filter or ground loop isolator if the problem persists. If these steps don't work, consulting a professional for further diagnosis may be necessary.