| 摘要 |
The invention relates to an apparatus comprising a first interface intended to be connected to a sound reproduction device and at least one second interface intended to be connected to at least one microphone, and an acoustic processing unit suitable for outputting an audio signal that is filtered by attenuating or suppressing a reference audio signal of an audio signal received from the second interface. In an initialization stage, the apparatus determines (405) propagation delay, configures (406) a buffer memory using a reading trigger threshold defined on the basis of the determined propagation delay. In a nominal operating stage, the apparatus transmits a third audio signal via the first interface, the third audio signal being the reference signal after the latter has passed through the memory buffer. |
