VR Headset Leakage Sequence
This test sequence performs a VR headset leakage measurement in the room from a VR headset when worn by a user.
VR headset leakage measurement is a useful parameter for virtual reality headset characterization. While they are sometimes connected to headphones, most VR headsets also contain built-in speakers, often on the strap close to the ear. These small speakers often have considerable audio leakage due to their positioning on the band, where there is some transmission through air before reaching the ear. This is annoying to others in the room, so efforts are made to minimize this.
For this measurement, the virtual reality headset is positioned on a head and torso simulator mounted on a turntable, and a log sweep played from 20Hz-20kHz at user-defined level and distance. The sequence measures leakage and frequency response for one ear in 10° increments from 0 to 180°, and mirrors it to provide a complete 360° polar plot. The final display produces a polar plot for four frequencies, and all eighteen measurements are shown on a frequency response graph.
- SoundCheck basic version 21 or higher
- TSR module p/n: 2006
- Polar Plot module p/n: 2011
- Audio Interface – AudioConnect 2 or similar p/n: 4047
- Portland Tool & Die MDT-4000 Turntable or similar p/n: 5820
- Measurement microphone – Listen SCM-4 or similar p/n: 4012
- Head and Torso Simulator
Hardware Setup and Calibration
Note: VR Headset connectivity will depend on the manufacturer. Please refer to the specific manufacturer’s instructions for connecting your VR Headset to your computer.
- Connect the audio interface and turntable to the test computer
- Connect your VR Headset to the SoundCheck PC and make sure that it is visible in Device Manager and Control Panel > Sound.
- Open Soundcheck Hardware and add Digital Output Channels. When first opening the sequence, you will encounter a relink dialog since the Output Signal Path VR Headset L doesn’t currently exist in your calibration. You should select Add to System Calibration from the dropdown menu. Next you will be prompted to import the calibrated device file. Click Yes. And when prompted to overwrite the existing .dat file, click No. Before saving Calibration, make sure you assign the newly created Signal Path to the appropriate Hardware Channel you previously created for the VR Headset L channel.
- Mount the HATS onto the turntable
- Place the VR headset onto the head of the HATS
- Connect the microphone to input 1 of your audio interface
- Calibrate the measurement microphone as instructed in the SoundCheck manual
- Position the measurement microphone perpendicular to the left ear of the HATS, at the same height as the ear