High-fidelity sound recording of a BYD Han EV driving at a constant speed of 120 km/h on a mirror-smooth concrete highway within an ISO 362-certified anechoic chamber. Emphasize the signature low-frequency magnetic resonance (400-600 Hz fundamental frequency with 2nd harmonic overtones) from the permanent magnet synchronous motor, uniform tire contact noise on polished tarmac, and controlled laminar wind noise. Explicitly exclude all external noise: no traffic, road imperfections, or mechanical vibrations beyond the EV's drivetrain components.