Function Keys of the AD528 explained

Let's have a look at how we can use the function keys during tone audiometry.

The function keys are the six keys underneath the display.

They change function, depending on which test we are in.

When we are in the tone audiometry screen, we have the six keys, starting with the first one being the ability to toggle between the dB step sizes: 5dB step size, 1dB step size or 2dB step size.

The second key is our measure type.

So in case we want to change to Most Comfortable Level or maybe Uncomfortable Level, we can do that from here.

The Condition key will be enabled once the Free Field is activated.

When that is the case, we can change between None, Aided if you are wearing hearing aids, Binaural if you want to test on both ears, and Both if the patient is both aided, and being tested on both ears.

Next to that we have our Masking function, that shows us our masking table.

I will show you an example of how it will look, when Masking is present.

So we enable our masking, and store the threshold with masking and we can then see at the particular frequency, at what level it was masked.

On the fifth key we have the manual reverse function.

"Manual" means that you have the sound off all the time, and the sound will be present, when you press the Tone Switch.

Reverse is the opposite, meaning that the sound is on all the time, and the sound will turn off when you press the Tone Switch.

The last one is our Single Pulse Stimulus.

Right now it's not enabled, meaning that every time I press a sound, it will be presented, as long as I press the Tone Switch.

If I want to set sound, that is on for, for instance 500 ms, I can then enable it, and a single pulse will be present on screen, as you see.

And also in the transducer for 500 ms, independent of how long, I touch the Tone Switch.

The last one is a Pulse Stimulus that appears, and will be a sound, that can be used in certain scenarios, where you want the patient to hear easier.

For instance in a case of a tinnitus patient, where they may have a hard time hearing the tone that is presented close to their tinnitus.

Here we can present a pulsed sound, that we can see on the display here, that it is a pulse sound being present.

That eases the task of listening to the tone for certain patients that we test in the clinic.

That is an overview of the six function keys and their use during tone audiometry.