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9. Using the head tracker
Headzone uses unique, patented, ultrasonic head-tracking technology to make the virtual surround reproduction as realistic as
possible. As ultrasonic signals always require a transmitter and receiver, the headtracking system consists of two components: the
ultrasonic exciters mounted on the DT 770 PRO or DT880 PRO and the Headzone rail (see chapter 5.2 “DT 770 PRO HT / DT 880 PRO HT
Headphones” and 5.3 “Headzone Rail and Clip”). Here is some information on how to get the best performance from your head
tracker:
Never forget ultrasonic signals are still sonic! That means you should always make sure that there is a clear line of sight between
ultrasonic exciters and receivers. Anything in between (e.g. plants) will affect the performance of your head tracker. That is why the
exciters are mounted on the top of your DT 770 PRO or DT880 PRO, to avoid your hair or face getting in between exciters and receivers.
When working with Headzone you should normally sit in front of your PC; you will not normally start turning around 360°. That is
why we optimised the head tracker for maximum performance in the front plane. This means the head tracker is supposed to
operate within an angle of +/-60° degrees out of the middle axis, but in return offers an accuracy that is exact by 1°. For close
distances, the head tracker is normally fully operational for angles of as much as +/- 90°. To check if you are within the correct
working range of the head tracker, please observe the head tracker status LED on the front panel of the Headzone base station
(see chapter 5.1 “Base station”) or look at the head tracker view of the software control panel (see chapter 8.5 “Control / Status
Panel”).
For more details about the head tracker operating range, please refer to chapter 12. “Technical specifications”.
Note:
The Headzone head tracker system is designed to be able to run up to two devices in parallel without interfering with each other.
That means, when using two headzone devices at the same location they must be configured for parallel operation (refer to chapter
8.5.5 “How to determine the head tracker mode”). When using more than two adjacent ultrasonic head tracker systems these interfere
with each other and will therefore not work correctly. To avoid this, please separate the systems by using movable walls, for example.
max.
± 60°
Maximum head angle
Rail
max.
± 45°
max.
4m
Maximum distance and horizontal off-axis angle
Rail
max.
± 30°
Maximum vertical off-axis angle
Rail
2