According to one embodiment, an acoustic signal corrector includes: an output module; a selection receiver; and a holder. In order to generate complementary delayed clock signals, provision is made of switching elements, which tap off the clock signal to be delayed along the series circuit of delay elements. The first vehicle is notified about the presence of the second vehicle andor the second vehicle is notified about the presence of the first vehicle in response to the receiving. for a period of time ranging from approximately 10 hours to approximately 100 hours to form whiskers. Also, the preferred tool is made in one piece with a connecting portion and a turning portion thereon.