your attention please....



குணம் நாடி குற்றம் நாடி அவற்றுள்
மிகை நாடி மிகக் கொளல்.”

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THIS bilingual BLOG

IS INTENDED TO CREATE A BETTER AWARENESS OF HEALTH ISSUES AMONG PUBLIC
.

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nothing in this blog will ever ever substitute a sincere consultation and a meaningful advice of a doctor.

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மருந்து தருவது மருத்துவன் கடமை. ஆரோக்கியம் பெறுவது ஆண்டவன் அருள்.



Saturday, May 21, 2016

20Hz to 20kHz (Human Audio Spectrum)

Sinusoidal wave going trough entire human audio spectrum, starting at 20Hz and ending at 20kHz. Note that the frequency increases exponentially, the idea was to increase the frequency by constant fraction of currently played frequency rather than by a constant value (which would result in clearly noticeable fast change at lower frequencies and nearly no change at higher frequencies). Enjoy.

Note: This wave has the same volume level measured by acoustic pressure all the time, however human sound perception differs depending on frequency. For lower frequencies (below 1kHz) you might want to increase your volume, but don't forget to lower it later to avoid damage to your hearing. 

If you don't hear anything below 40-50Hz even at full volume your audio hardware is probably incapable of playing lowest frequencies. You might want to try to listen on the headphones in such case. Also if you stop hearing sound somewhere between 10kHz - 20kHz - do not increase your volume for safety reasons. Every human hears a bit differently and have different hearing thresholds. Hearing range also changes with age. Younger people can usually hear higher frequencies.

For HD (High Definition) version of this test, which might yield better audio quality see: http://www.youtube.com/watch?v=H-iCZE...
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