What type of noises are prohibited by the German traffic ordinance?

The German traffic ordinance specifically prohibits avoidable noises, such as honking horns, to maintain a peaceful environment and to minimize disturbances in residential and urban areas. The rationale behind this rule is that honking horns can be disruptive and may lead to unnecessary stress or anxiety for pedestrians and residents. While there are circumstances where honking is necessary, such as to alert another driver of a potential hazard, excessive or unnecessary use is discouraged.

In contrast, sirens from emergency vehicles are not only permitted but expected, as they serve a critical purpose in public safety. Normal engine sounds and sounds from a vehicle's stereo system are typically within acceptable limits unless they become excessively loud and disturb the peace. The focus of these regulations is on controlling noise that serves no essential function and can be avoided, thereby fostering a safer and more pleasant driving environment.