How are the different parts synchronized? (Wireless Kit)
The EMDR Kit Wireless is designed to provide a cohesive multi-sensory experience across visual, tactile, and auditory channels. By default, the Pulsators and Headphones are precisely timed to the movement of the Light Tube to ensure that the tracking feels natural and consistent for the client.
1. Understanding Audio & Sound Synchronization
When configuring the Wireless Headphones in the app, you will find three distinct options under "Sound synced to".
Important Note: There is no literal button labeled "Normal" in this menu. A steady, regular left-right audio cadence is the standard behavior when you select either Light Tube or Pulsators.
Light Tube: The audio tone triggers exactly when the moving light dot hits the outer left and right edges of the Light Tube, alternating sides to match the visual direction shift.
Pulsators: The audio tone triggers perfectly in sync with the physical vibration of the tappers (Left tapper vibrates = Left headphone sound plays).
Random: The app plays unpredictable, chaotic audio intervals. This mode is explicitly designed to increase working memory load (WMT) during desensitization and prevent habituation.
2. The Core Synchronization Logic
To create a balanced multi-sensory environment, the system automatically coordinates how stimuli cross the client's midline:
Moving to the Right: As the light dot passes the center of the Light Tube moving right, the right Pulsator vibrates. The right headphone tone triggers when the dot hits the right edge (or matches the pulse, depending on your sync selection).
Moving to the Left: As the light dot passes the center moving left, the left Pulsator vibrates. The left headphone tone triggers when the dot hits the left edge.
Why the Midline? Tactile triggers are optimized for the exact moment the client's eyes cross the midline. This biological timing ensures the brain processes the tactile shift seamlessly alongside the visual tracking task.
3. Customization: Using Different Speeds (De-Syncing)
While synchronized stimulation is the standard framework, you can decouple the speed of your auditory or tactile channels from the main rhythm of the Light Tube.
If you want the Headphones or Pulsators to run at a steady left-right pace that is faster or slower than the light dot, you can use the Independent Speed feature.
How to set an independent speed:
Tap the Pulsator or Headphone icon in the app menu.
Toggle the option labeled "Use different speed" (Gebruik andere snelheid) to ON.
A separate speed slider will appear. Adjust this slider to manually set a dedicated rhythm for that component.
System Constraint: The "Use different speed" option is only available when synced to the Light Tube or Pulsators. It cannot be activated when using the Random sound mode, as that mode relies on unpredictable intervals rather than a fixed speed.
4. How Overall Speed Impacts the Stimulus
The EMDR Kit app automatically recalculates hardware timings on the fly to keep your settings feeling natural:
At Higher Speeds: Because the tracking movement is fast, the physical pulsations and audio tones are automatically shortened to maintain a crisp, clean rhythm.
At Lower Speeds: Because the movement is slow, the pulsations and audio tones become longer and more sustained.