The electronic dog in the driving road drops a few sounds, but did not say speed limit, red light photo and so on, just drops a few sounds, this drop is what it means?

This is your electronic dog was interfered with, high-end cars, electronic dogs, automatic doors, transformers, medical equipment and other electronic equipment may interfere with the electronic dog, so that the electronic dog sends out false alarm signals, such as the need to eliminate, the need to replace the high-end electronic dog, high-end electronic dog is good at its detection ability and anti-interference ability.