How to calibrate the HDL410 system

The HDL410 system uses calibration sequences to understand the acoustics of a room and to ensure optimum audio quality. During a calibration sequence, the HDL410 generates a signal that sounds similar to static.

Initial calibration

When the HDL410 system’s components are connected and switched on for the first time, a calibration process will automatically start. This calibration has two stages.

1. Acoustic calibration: The first stage of the process (two long blasts of white noise) is used to understand the acoustics of the room and tune the echo canceler.

2. Geometric calibration: The second stage (two short blasts of white noise lasting 12 seconds) is new to the HDL410 system.

We recommend having the HDL410 system installed before switching it on for the first time. If the system is switched on up pre-installation, it will still require recalibration after being installed to ensure optimal audio quality.

Autocalibration

Autocalibration is a continuous process and occurs while the HDL410 system is switched on. No user action is required to start or maintain the autocalibration process. The system usually takes a few minutes to gather sufficient calibration data and continues to fine-tune over time. This process does not affect the functionality and usability of the system. Autocalibration helps the HDL410 system understand changes to the room’s acoustics and ambient noise.

Fast calibration

Fast calibration is a process that calibrates the system within seconds. This process may be initiated manually through a remote control sequence or by using Nureva^® Console. Fast calibration takes approximately 20 seconds to complete.

This option should be used when there are significant changes to the HDL410 system or room configuration. Make sure there are no audible sound sources in the room other than normal ambient noise (e.g., no music playing, no people talking).

It’s possible to start a fast calibration during a call. However, both parties will not be able to hear each other while a fast calibration is taking place. The microphones and speakers will be temporarily disconnected. The call will resume after fast calibration is complete.

Recalibration through Nureva Console

The following steps are required to perform recalibration through Nureva Console cloud or client:

1. Go to Device Settings.

2. Select Audio processing.

3. Under Recalibrate, click Start.

4. When the calibration signal stops and the status indicator lights return to a normal state, the recalibration is complete.

Recalibration using the remote control

Below are the steps for initializing the manual recalibration through the remote control.

1. Press the F4 button on the remote control five times in quick succession.

   • A single blue light will start flashing on the integrated microphone and speaker bars.

2. Press the Mute button on the remote control and the HDL410 system will enter recalibration mode.

   • The status indicator lights will alternate between solid red and solid blue.

3. When the calibration signal stops and the status indicator lights return to a normal state, the recalibration is complete.

Note: When recalibrating an HDL410 system, the status indicator lights on both microphone and speaker bars will alternate between solid red and solid blue. Pink noise will be heard from both microphone and speaker bars.