How to calibrate Audiqueen for SoundC?

Modified on Mon, 27 Jan at 12:45 PM

SoundC is the hardware setup with an external multichannel soundcard and can manage up to 24 loudspeakers. This set-up can be used for azimuth localization and speech-in-noise tests with speech and noise coming from one or more different speakers. To calibrate the SoundC setup, make sure the volume dial is set on the same level for all speakers, preferably at the maximum volume. After opening the calibration window, proceed with the following steps.

Select the SoundC soundcard and define the set-up of all channels (7 in this example). For each speaker designate its position in degrees azimuth (from -180° to + 180°, where 0° is in front of the listener) and give each channel a label.

Make sure each speaker is equidistant from the test person's position.

Follow the instructions and play the calibration signal while you measure the intensity with a sound level meter near the patient’s head.

If the measured intensity is different from 70 dB SPL, there are 3 ways you can fix it:

Absolute preference: place the speakers closer to or further away from the test subject's position.
Second best: Change the gain (volume) of the active speakers. Most active speakers have a volume knob to change the gain of the built-in amplifier. You should make sure that this knob is in exactly the same position on each speaker.
Least desirable: Use the slider at the bottom of the screen to lower Audiqueen's internal gain. Bear in mind that adjusting the Audiqueen slider will reduce the dynamic range of your signal!

Now run the verification tool to double-check the calibration of each speaker.

This feature is not available in the web viewer.