Hands-free speech communication device for an emergency call system
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United States of America Patent
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Mar 6, 2018
Issued Date -
N/A
app pub date -
Jul 14, 2017
filing date -
Jul 20, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
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.
First Claim
Family
International Classification(s)
- H04M:TELEPHONIC COMMUNICATION
- H04R:LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR ....
- B60R:VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT ....
- G08G:TRAFFIC CONTROL SYSTEMS
- H04W:WIRELESS COMMUNICATION NETWORKS
- G01S:RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMI....
- B60Q:ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE....
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