How do we do it?
The basic idea is very simple. Whereas in a typical HRTF measurement your head is fixed and the loudspeaker position changes, sampling the sphere around your head during the measurement, this is reversed in our setup. Here, you are seated in front of one of your loudspeakers at home and, while a sound file provided by us is playing, you rotate your head freely in all possible directions. From the viewpoint of your head, the sound is always coming from a different direction as you move your head, again providing a sampling of the sphere around your head. The measurement can be performed with different setups (see below), but in the hardcore DIY method your smartphone is fixed to your head and collects all the data. After about 15 minutes of moving your head around, the collected data is uploaded to Earfish where your personal HRTF is calculated by our proprietary algorithms (patent pending). Finally, we send you your HRTF file in SOFA format, ready to be used.