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F.A.Q. Frequently asked questions.

Discriminative Frequency Training - 2/3 Octave Bands

Switch to : Full Octaves  (easier)

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 help you discriminating 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

The audible spectrum has been divided into 14 bands (2/3 octave spacing), from 40Hz to 16kHz. Listen to each octave and try to associate it with its respective center frequency.

wav ↓	wav ↓	wav ↓	wav ↓	wav ↓	wav ↓	wav ↓
40Hz	63Hz	100Hz	160Hz	250Hz	400Hz	630Hz
wav ↓	wav ↓	wav ↓	wav ↓	wav ↓	wav ↓	wav ↓
1kHz	1.6kHz	2.5kHz	4kHz	6.3kHz	10kHz	16kHz

Test Files

For each column, tick the appropriate radio button. When the 10 files have all been labeled, click the "Submit" button to get your score. Reload the page as often as you want to perform new tests.

40Hz
63Hz
100Hz
160Hz
250Hz
400Hz
630Hz
1kHz
1.6kHz
2.5kHz
4kHz
6.3kHz
10kHz
16kHz

Once you have succeeded in getting 9 or higher without listening to the individual labeled files during the test, your training will have been successfully completed.

Let's have a test on a real music signal now...

External Links

• Equalization by the Octave
• Equalization @ Wikipedia