How to perform Masking Level Difference (MLD) with Equinox Evo

Equinox Evo Support

Headphones or insert phones

Go to Menu | Tests | MLD: Masking Level Difference.

Before mounting the headphones on the patient, explain to them that they will now hear tones (identical to the ones from the air conduction audiometry) and noise through the headphones. Emphasize that they should only focus on the tones and press the response button whenever a tone is audible.

Select the frequency that you would like to test; 250 or 500 Hz are good starting points.

Select S0N0 and set the intensity level for both channels at 60 dB.

Ensure that the decibel steps are set to 2 dB.

Make a masked threshold search. The threshold will typically be equal to the noise in the S0N0 condition.

When you have established a threshold, click Store on the Touch Keyboard or the PC keyboard.