Patent ID: 7941189

Claim:
A communicating road noise control system including an in-vehicle road noise controller and a server that communicate with each other via a communication network, the in-vehicle road noise controller comprising: a voice inputting means disposed in a compartment of the vehicle for inputting a voice frequency signal; a voice outputting means disposed in the vehicle compartment for outputting a received voice signal; a voice relaying means for outputting, as a transmit signal, the voice frequency signal inputted from the voice inputting means to a telephone means and for outputting the received signal inputted from the telephone means to the voice outputting means; a present position detection and transmission instructing means for causing an external device to detect the present position of the vehicle and causing the external device to transmit the present position of the vehicle to the server; a noise spectrum pattern transmitting means for transmitting a noise spectrum pattern to the server; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the server; and a road noise reducing means for reducing road noise based on the noise spectrum pattern received by the noise spectrum pattern receiving means; and the server comprising: a present position receiving means for receiving the present position of the vehicle from the external device; a noise spectrum pattern receiving means for receiving the noise spectrum pattern from the in-vehicle road noise controller; a noise spectrum pattern optimizing means for analyzing the noise spectrum pattern received by the noise spectrum pattern receiving means to leave a stationary component and cancel a non-stationary component and thereby optimizing the noise spectrum pattern; a noise spectrum pattern determining means for determining the noise spectrum pattern corresponding to the road surface on which the vehicle is presently running based on the present position of the vehicle received by the present position receiving means and road information stored in a map data storing means; a noise spectrum pattern outputting means for storing a plurality of different noise spectrum patterns optimized by the noise spectrum pattern optimizing means in correspondence with a plurality of different road surfaces and for selecting the noise spectrum pattern determined by the determining means from among the plurality of noise spectrum patterns and outputting the noise spectrum pattern; and a noise spectrum pattern transmitting means for transmitting the noise spectrum pattern outputted from the noise spectrum pattern outputting means to the in-vehicle road noise controller.