Sound Reproduction

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Fig 1: Subwoofer Module Communication

Courtesy of VOLVO CARS CORPORATION

During the transfer of sound signals to the Subwoofer module (SUB) (16/79), the Infotainment control module (ICM) (3/281) allocates a channel on the MOST network. The Audio module (AUD) (16/105) transmits sound signals to Subwoofer module (SUB) via the MOST network.

All filtering and sound treatment of the sound signal occurs in the Audio module (AUD).

Volume control occurs in the Subwoofer module (SUB).

The volume of the subwoofer module (SUB) is raised or lowered using the volume knob on the infotainment control module (ICM). The infotainment control module (ICM) transmits a request on the MOST network to the subwoofer module (SUB), which then processes the request and actively raises or lowers the volume.

The limiter function in the subwoofer module (SUB) does not permit an increase in the output level if this would lead to a reduction in sound quality.