Blind testing a 0.2dB Level Difference
A 3 dB tolerance is a common figure in frequency response
specifications. Some professional systems go beyond by one or two
decibels. In some eccentric cases, fractions of a decibel are
quoted. This test helps you determine the smallest difference
in levels you can detect.
Files being tested
The first one plays back a 440 Hz sine tone characterized by a
sudden increase in level occurring after 1 second (0.2 dB in this case). The second file introduces a decrease in level
by the same amount. The third one is flat.
For each column, tick the appropriate radio button. When you have labeled all 10 files, click the "Submit" button to obtain your score.
Reload the page as often as you want to perform new tests.
If you didn't pass this test with a score equal to 9 or higher,
you possibly reached the limit of your hearing.