Patent ID: 8618958

Claim:
A navigation device comprising: a communication module for transmitting and receiving a signal to and from external communication equipment; a tone signal identifying unit for identifying a touch-tone signal sent thereto via said communication module from said external communication equipment, the touch-tone signal indicating a type of content of speech to be transmitted from the external communication equipment; a voice recognition unit for performing voice recognition on an utterance in a voice signal sent thereto via said communication module from said external communication equipment by using the touch-tone signal; a voice guidance output unit for outputting a guidance signal, said guidance signal indicating a voice guidance prompting a user of the external communication equipment to speak the utterance upon which the voice recognition is performed; a microphone for inputting a voice signal to the navigation device; and a processor for generating a transmission voice using the voice signal input by the microphone, the processor being configured to mix the transmission voice with the guidance signal output by the voice guidance output unit, and supply the communication module with the mixture to transmit said mixture toward the external communication equipment, wherein the processor includes a sound volume control unit for controlling the transmission voice to reduce volume, said transmission voice being mixed with the guidance signal, wherein the processor includes a navigation part for acquiring the result of the voice recognition by said voice recognition unit, and performing at least one of a route search and route guidance based on the acquired result, and wherein the guidance signal outputted by said voice guidance output unit and mixed with the transmission voice indicates another voice guidance which informs said user of the external communication equipment of possible types of content of speech upon which the at least one of the route search and route guidance can be performed.