A speech communication device includes microphones configured with: microphones M1 and M2 disposed at positions which are axisymmetric with a centerline in a width direction of a housing as a symmetric axis; and a microphone M3 disposed at a position which is on the centerline and closer to a speaker than the microphones M1 and M2 are. The speech communication device is further equipped with: a sound processor which includes: a beam former which is connected to the microphones M1 and M2 and forms a bidirectionality in which directionality is strong in two directions each perpendicular to the centerline and is weak in two directions each along the centerline; and an echo cancel unit which is connected to the beam former and the microphone M3 and removes a sound signal having been output from the microphone M3 from a sound signal having been output from the beam former.
HANDS-FREE SPEECH COMMUNICATION DEVICE FOR AN EMERGENCY CALL SYSTEM
2018-01-25
Patent
Electronic Resource
English
IPC: | H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01S RADIO DIRECTION-FINDING , Funkpeilung / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / H04M TELEPHONIC COMMUNICATION , Fernsprechverkehr |
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