What does space audio head tracking mean?

It is the technology released by Apple, as follows:

Space acoustics can simulate the multi-channel sound effects of cinemas to create a strong sense of space. The position of the user's head can be obtained through the calculation of accelerometers and gyroscopes on the equipment, and the positioning of each simulated channel can be ensured when the user rotates his head.

The functions of head tracking are:

1, which makes TV programs and movies sound super immersive, as if audio is coming from all angles.

2. Use the acceleration sensor and gyroscope of AirPods Pro to track the head movement and remap the sound field. In other words, when you shake your head while watching the video, it can also reset the sound stage according to your moving trajectory.

3. When you sit down to watch a movie or TV program, the attached head tracking function will be locked after detecting that you have been looking at the same direction for a period of time.

4. when watching supported programs or movies, AirPods? Max and AirPods? Pro uses spatial audio to provide an immersive surround sound experience.

5. With the spatial audio supporting dynamic head tracking technology, you can hear the surround sound channel in the corresponding direction even if you turn your head or move the iPhone (on the supported model).

If there is a gyroscope in the earphone, we can feel the shaking of our heads. Computational audio technology can judge the relative position between our ears and the screen, and then play sounds with different time difference and sound level difference in our ears, and even simulate the effect of auricle reflection.

This calculation will match the position of the mobile phone screen, making us mistakenly think that the sound will always come from the direction of the screen. Even if we hold the mobile phone behind us, we will think that the sound in the earphone is coming from behind.