Listening Test - Instructions
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How the test works
A few tips just before we start the test:

It is strongly recommended to use Headphones. A good HiFi System is ok, but small multimedia boxes add to much of their own distortion.

You have to compare two samples: one is the pure linear signal, the other is the the loudspeaker output with enhanced or attenuated distortion. We don't tell you which sample is the distorted one - click "Sample A" or "Sample B" to play them, then make your choice.

It is easy at the beginning - we start with strongly enhanced distortion. If you recognize the distorted sample correctly, we'll make it harder. If you are wrong, we'll go back a few steps. How far can you go down?

Sorry - there is no "I don't know" option. If you are not sure, trust your intuition. You can hear more than you think, so we force you to take a choice. The test takes a few extra steps to weed out "good luck guesses".
 
An easy example:
Click on the "Sample A" and "Sample B" button, and tell us which is the distorted one. (distortion is highly enhanced here)


Note: if you don't see two buttons "Sample A" and "Sample B", or a "loading..." sign or you need to install Macromedia Flash 6

Loading the sound files might take a few seconds on a slow connection - while the test is running we preload them to make it faster.

 Click to play:

What do you think?

A is Distorted B is Distorted
 
Ready to go?
Just this little information we need:
I listen using:
I have previous experience with such a test: Yes No
test signal:    pop music
speaker: 6" midrange driver
start with another music/speaker - combination
 
Tips:
  • Trust your feelings! Near your audibility threshold, you can't tell the difference for sure anymore. That's perfectly ok with the test.
  • The test is easier when you listen at higher loudness - but still keep it comfortable for you.
  • Repeat the test to train your ear