Why does the Porsche 7 18 get quieter in cold weather?

In cold weather, the noise of Porsche 7 18 becomes smaller. Reason:

1, the horn is wet, and the weather or when cleaning the car will cause moisture to enter the horn, causing the horn to ring or not.

2. The horn circuit is broken. If the owner likes to press the horn for a long time while driving the vehicle, the resistance of the horn contact will be too large, which will weaken the current of the horn circuit and the electromagnetic coil wire, and finally the car horn will be hoarse or have no sound fault.