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Frequencies are most commonly measured in Hertz (Hz), where 1 Hz is equal to one cycle wave per second. For humans, the audible range of frequencies is usually said to be between 20 Hz and 20 kHz (20,000 Hz). However, there is considerable variation between individuals - especially at the high frequency end, which is also affected by a gradual decline with age.

The following is a quick test to determine your Hearing Age, your age according to your ability to hear high-frequency sounds. Work yourself through the different frequency levels and set your limit to the last one that is still audible to you. You may want to turn down the volume of your loudspeakers or headphones before you start.

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