In this paper, we propose a new distance measurement method for a distance-based howling canceller. We have previously proposed a howling canceller which uses only distance information between the loudspeaker and the microphone. The howling canceller suppresses howling based on the distance measured by a sonic wave. The conventional method however has a noise while on distance measurement. To solve the problem, we propose a new distance measurement method which suppresses the noise. Simulation results in a practical environment show that the proposed distance measurement method can almost exactly estimate the distance more silently than the conventional method.
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