How to Create a Frequency Pattern Test Using Adobe Audition and Praat?

In this article, I will explain how to create the Frequency Pattern Test. As I mentioned in the previous article, 880 Hz (Low) and 1122 Hz (High) pure sounds are used in the Frequency Pattern Test.

Note: According to Musiek (1994), the stimulus duration is 150-msec, the interstimulus interval is 200-msec; the time between patterns will be taken for 6-sec. As at first, we will learn the formation of the Low-Low-High pattern and then you will be able to create all the patterns on your own.

Creating Pure Sounds: I use Praat Software to create pure sounds of 880 Hz and 1122 Hz.
After opening the Praat software, click the “New Sound-Create Sound as pure tone …” tab.

Name: 880Hz (make sure the characters are unified)
Start time (s): 0.0
End time (s): 0.15 (150-msec)
Tone Frequency (Hz): 880
Note that the Fade-in duration (s) and the Fade-out duration (s) values should be 0.01 because Musiek determined the rise and fall times as 10 msec in the Frequency Pattern Test.

We should do the same for 1122 Hz and then click the OK tab. We will see a screen like the following.

Let’s save our sound files!
One-click on the sounds and then perform the following step.

At this stage, I’ve switched to Adobe Audition to create the frequency patterns.

Open the Adobe Audition software and click the ‘File-New-Multitrack Session …’ tab.

Session Name: Frequency Pattern Test

You will see a screen like the one shown below.

At this stage, take the sounds we produce and upload them to the software as on the screen.

The interface and usage of Adobe Audition software is very simple. I’ll share a screenshot of each step from now on, try to do it as accurately as possible and contact me if you encounter a problem.

As shown in the figure below, our pure sound of 880 Hz started at 0.00 and ended at 0.15 sec (150msec). Total duration is 150 msec.

Then, according to our test, we leave a 200 msec gap and put our 880 Hz pure sound again at 350 msec.
As shown in the figure below, our pure sound of 880 Hz started at 0.35 and ended at 0.50. Total duration is 150 msec.

We’re placing the 1122 Hz pure sound that we call high.
As shown in the figure below, our pure sound of 1122 Hz started at 0.70 sec and ended at 0.85 sec. Total duration is 150 msec.

At the end of all procedures, we created our first frequency pattern.
We placed the LLH frequency pattern between 0.00 – 0.85.
As is known, six different patterns are created and randomly arranged in the Frequency Patterns Test.

Now is the time to combine the pure sounds we settled.
First of all, let’s make the pure sounds that we created by minimizing the screen completely selected.
Then right mouse click on any sound and click ‘Bounce to New Track – Selected Clips Only’ tab