Patent ID: 8634547

Claim:
A telephone device comprising: a loudspeaker radiating sound of a far-end signal; a plurality of microphones each capturing a near-end voice to produce an input near-end signal; a near-end signal processor that delays each of the input near-end signals by a delay amount associated with the input near-end signal to thereby form a corresponding plurality of delayed input near-end signals, and that synthesizes the delayed input near-end signals to each other to thereby form a single synthesized input near-end signal; and an echo canceller that removes an echo component from the synthesized input near-end signal to transmit a resulting signal to a far-end side, wherein said echo canceller comprises a delayed far-end signal forming section delaying the far-end signal by the delay amounts to thereby form a corresponding plurality of delayed far-end signals, a synthesized far-end signal forming section synthesizing the delayed far-end signals to each other to thereby form a single synthesized far-end signal, and an echo suppressor using the synthesized far-end signal to suppress the echo component of the synthesized near-end signal.