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.

0.1 dB Up | 0.1 dB Down | Flat |

The first one plays back a 440 Hz sine tone characterized by a sudden increase in level occurring after 1 second (0.1 dB in this case). The second file introduces a decrease in level by the same amount. The third one is flat.

0.1 dB Up 0.1 dB Down Flat | |

Listen to [?] then vote — multiple guesses not allowed (your vote triggers a new draw) |

To pass a blind test, you will need to perform 10 trials at least, obtain a high score and reach a high confidence level: 95% is standard to rate statistical significance. It means that your score outperforms random guesses by 95%. There is still a probability that you just got lucky though, 5%. To reduce such probability to 1%, keep testing until you reached a confidence level of 99%.

If you didn't pass this test, try with a higher level difference. Change the target on the top of this column.

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- Find the smallest difference in sound levels you can detect.

The Level Series: 6dB 3dB 1dB 0.5dB 0.2dB 0.1dB - Find the highest frequency you can reliably hear.

The Frequency Series: 10kHz 11k 12k 13k 14k 15k 16k 17k 18k 19k 20kHz - Find the smallest difference in pitch (frequency) you can hear.

The Pitch Series: 50c 20c 10c 5c 2c 1c - Find the shortest timing difference you can reliably hear. NEW

The Timing Series: 1ms 2ms 5ms 10ms 20ms 50ms 100ms - Find the highest dynamic range offered by your listening environment.

The Dynamic Range Series: 36dB 42dB 48dB 54dB 60dB 66dB 72dB 78dB - Do you have the absolute hearing ability?

The Perfect Pitch Blind Test: C Scale Chromatic - Are your ears sensitive to Absolute Phase?

The Absolute Polarity Blind Test: Here - Can you hear a difference between 16-bit and 8-bit audio files?

The 16-bit v/s 8-bit Blind Test