Extension of the proven eVNG around the head impulse test (HIT). There are two integrated 3-axis gyroscopes in the mask for the optimal detection of the head movement and a further two 3-axis acceleration sensors for calculating the position in space. Video Processing Improved signal-to-noise ratio Optimal image processing Focus manually adjustable True 100 Hz video recording Slow motion display of pulses Measuring of the head movement 800 Hz Non-slipping mask Comfortable to wear