Customer
The client wanted to develop an AVAS device for electric vehicles that would simulate engine noises. They tasked Softeq with electronics design, enclosure design, firmware development, as well as testing and debugging.
The delivered solution supports audio playback in three vehicle zones through external loudspeakers. The device reproduces realistic engine sounds in real time as the car moves, accelerates, decelerates, starts, and stops
- Business Name NDA
- Location Europe
- Business Activity Production of electric vehicles
Solution
AVAS Device Composition
The device consists of a small control unit, flash memory, and CAN / Automotive Ethernet transceivers.
The solution is capable of reproducing realistic engine sounds in real time as the car moves, accelerates, decelerates, starts, and stops. The system supports audio playback in three vehicle zones through external loudspeakers. Compliant to the ISO 7637-2 standard, the device has a wide 7 V to 32 V operating input voltage range along with a surge protection scheme, and is therefore suitable for both cars and trucks.
Device Control and Audio Playback
Controlled via the CAN interface, the device features two sound transmission options.
The device is controlled via the CAN interface. Supported commands:
- Waking up from sleep mode
- Start playing the required sound
- Stop playing the sound
- Transmission of service information
Depending on speed, driving direction, acceleration, braking load, etc., the suitable sound will be transmitted from the multimedia unit via Automotive Ethernet or loaded from the internal memory.
To ensure that the sound will be played in sync with engine operation, we provided the solution with the possibility of mixing and cycling audio as well as playing sounds with a delay.