Embedded system creates internal and external engine sound for EV and HEVs

Analog Devices has introduced an embedded system for generating engine sound for EV and HEV. The ADSP-BF706 digital signal processor and Electric Vehicle Warning Sound System firmware allows automobile manufacturers in North America and other global regions to comply with future safety regulations mandating external engine sound for EVs and HEVs travelling at low speeds. The solution offers a complete hardware and firmware reference design. The solution can be scaled for high performance with the ADSP-BF706 or entry-level applications with the ADAU1450 Digital Audio Processor. The ADSP-BF706 can also be used to produce in-cabin engine sound to provide an improved driving experience for vehicle owners. The solution uses memory mapped quad SPI memory giving faster and easier access to the stored audio files used to produce the engine sound. It can access up to 24 WAV files simultaneously, compared to conventional products that can typically access only five. The company’s Sigma Studio IDE allows OEMs to graphically tune the audio sound when using the ADAU1450. This enables sound engineers with minimal programming experience to optimise audio performance while lessening development time.