The Interaural Time Difference (ITD) is one of the key factors for the spatial localisation of sound. By default, the plug-in uses a standard ITD. By measuring the distance between your ears, the plug-in tailors the ITD in the externalisation filter model to your individual head shape. Alternatively, you can measure your head circumference as well. This leads to an improved localisation of panned signals.
In HEADPHONE LAB, you can manually enter your individual distance between your ears or head circumference. You can switch between them by clicking on the respective visuals on the head graphic. Based on this, the interaural time differences (ITD) of the loudspeaker emulation are individually adjusted.
Measuring ear distance
Measuring the exact distance between the ears provides a precise basis for ITD calculation and is our recommended measurement method. For this you will need the following:
- a folding rule or yardstick.
- a second ruler that is at least 20 cm long.
To measure your ear distance, do the following:
- Take the folding rule and form it into an upside-down U shape.
- Use the outer segments and adjust them to the width of your head. For measurement, take the point at your head just at the entrance of your ear.
- Carefully remove the folding rule without changing its position and measure the distance between the two tips — this value corresponds to your ear distance.
- Enter the ear distance into the ITD Settings of HEADPHONE LAB.
Measuring head circumference
Our recommendation is to measure your head circumference, since it is the easiest way to measure your head dimensions of the two available options. For this, you will need a tailor’s measuring tape:
- Place the tape around your head.
- The tape should be slightly above your eyebrows and ears.
- Mark the circumference or find somebody to help you with it.
- Enter the head circumference into the ITD Settings of HEADPHONE LAB.