公开(公告)号：US09667284B1

公开(公告)日：2017-05-30

申请号：US15064413

申请日：2016-03-08

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Nissim Gean ,  Pavel Livshits ,  Shai Natanzon

IPC: H04W4/10 ,  H04W64/00 ,  H04B1/10 ,  H04M1/60 ,  G01S11/06 ,  G01S11/14

CPC classification number: G01S11/14 ,  G01S5/0257 ,  G01S11/06 ,  H04W4/023 ,  H04W4/10

Abstract: Method, device, and system for identifying a howling source and suppressing howling. One system includes a first communication device including a microphone, a first transceiver, and an electronic processor. The system also includes a second communication device including a second transceiver transmitting a radio signal and a speaker transmitting an acoustic signal. The electronic processor determines a first distance between the first communication device and the second communication device based on the radio signal received by the first transceiver. When the first distance is less than a first threshold, the electronic processor determines a second distance between the first communication device and the second communication device based on the acoustic signal received by the microphone. When the second distance is less than a second threshold, the electronic processor instructs at least one selected from the group consisting of the first communication device and the second communication device to suppress howling.