| 摘要 |
<p>The headset has a mixer circuit i.e. summing circuit (46), receiving inputs signals delivered by a feed forward filter (32), a feedback filter (42) and a stabilizer filter (44). The stabilizer filter is connected with a feedback branch for receiving input signal delivered by an internal microphone (36), and delivering output signal as an input to a combining circuit. The mixing circuit delivers a linear combination of the output signals delivered by the three filters together with a fraction of to-be played back audio signal (S) with respective weighting of gains applied to the signals.</p> |
