Switch to : 2/3 Octaves (difficult)
Purpose
Equalization (EQ) refers to the process of altering the frequency response of an audio system or a sound file. EQ can be used for esthetic reasons or to compensate for unwanted bumps or holes in the audio spectrum.
The following files will help you to discriminate frequencies across the audible range. By training your ears to recognize those frequency bands, you will acquire the ability to locate unwanted frequency bumps by ear and find the correct EQ fix in one go.
Training Files
| 31.5 Hz | 63 Hz | 125 Hz | 250 Hz | 500 Hz |
| 1 kHz | 2 kHz | 4 kHz | 8 kHz | 16 kHz |
The audible spectrum has been divided into 10 bands (octaves spacing), from 30 Hz to 16 kHz. Listen to each octave and try to associate it with its respective center frequency.
The Test
| 31.5 Hz 63 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 8 kHz 16 kHz | |
| 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%.
Once you have succeeded in getting a score of 100% without listening to the individual labeled files during the test, your training will be complete!
Let's have a test on a real music signal now...
External Links
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Take up the challenge
- 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
