AFAIK, BMW do not use DVC via microphone in the Top HiFi system (HK, Logic7, Individual Audio, B&O) but by speed sensing. SSVA is common since the E46 days regardless of OEM sound system.
Quote:
Originally Posted by snj49er
Do you know which of these systems are in use with the HK in the F3X cars?
Depending on the version, Harman Kardon sound systems are linked with the Dynamic Volume Control (DVC) or Speed-Sensitive Volume Adjustment (SSVA) to maximize comfort during driving.
The digital Dynamic Volume Control (DVC) ensures an optimum sound experience regardless of ambient noise. A well-placed microphone in the vehicle measures the signals from the sound system and any background noise. Rather than simply increasing the volume, only the affected frequencies are adjusted to adapt to the new noise situation. This ensures a pleasant, consistent music experience, even under difficult listening conditions.
The Speed-Sensitive Volume Adjustment (SSVA) ensures an optimum audio impression at any time, thanks to continuous adjustment of loudness in response to the speed of the car. Every change in speed is forwarded to the sound system by means of a speedometer signal so that the level is automatically adjusted accordingly. This gives passengers the impression that the sound level is the same at all times.
http://www.automotive.harmankardon.c...ns/dvcgal.aspx |