Sound Cards – IcematAudio

This USB sound card is for measurements using multimedia electret microphone.

Disadvantages are that it is not able to measure system delay. This is because it only has an microphone input and it is impossible to estimate the sound card system delay.

For a link with information click the help button.

Click the Next > button to continue.

The input and output levels are calibrated so you can use the sliders in the mixer and still obtain calibrated data.

You can measure the absolute sound level, e.g. dBA if you

* Know the sensitivity of your microphone* Have a calibrator

If you know the microphone sensitivity, click the Cal button and type in the sensitivity.

WinMLS is currently not able to measure the correct system delay if using this sound card.

Because of this reason, correction for sound card is not turned on as default (step 7 in Measurement→Settings…). The response of the card is not flat, so you could try turning it on. It should give a flat response up to 10000 kHz

For more information about this, go to Measurement→System Delay… and click the help button.

Click the Next > button to continue.

If you have problems getting the sound card to work, try reloading the setup.

On one of the PC's we tested, there was a peak before the measurement. This gave 1 dB ringing in the bass response.

When testing, we had problems with reverberation on the output. This was because we have just tested a USB sound card that is using the same chip. When we turned off the reverberation for this card, it worked fine.

Now load a setup that contains the measurement settings for your application.

You may wish to store this setup before doing this if you have done any changes you want to keep. To do this, go to Setup→Store….