Audible Frequency Range
The table below represents how all the different frequencies sound. It is worth noting that most the sounds we hear are in the Mid Range bracket. Therefore, when mixing it is crucial that the individual frequencies are clear and well balanced, otherwise the song would become very muddy. Next to all the ranges are sound samples which you can click on to hear what they all sound like at their top ranges. Take care as they can be quite uncomfortable to listen to at the top end. They all have an output of -9dBa. Depending on the speakers you would be listening to, you might be able to hear some better than others. It is unlikely that 20hz will come through at all unless you have a subwoofer. Instead of a 20khz sound file, the highest it goes up to it 16khz because you might be able to hear it.
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1 - 20hz
4 Octaves, sound is felt not heard - Subsonic
20 - 40 hz
1 Octave heard but not as pitch - Very Low Bass
40 - 160hz
Heard as pitch, wooly low end, hardness high end - Bass frequency
160 - 320hz
Hard edge sound, sounds harsh on its own - Low Mid Range
320 - 2.5khz
Most sounds occur in this range - Mid Range
2.5k - 5khz
Also known as presence frequencies, most vocals in this range also 'sibilance' i.e. voice hiss - High Mid Range
5k - 10khz
Highest frequencies, mostly harmonics - High Frequency
10 - 20khz
Pure harmonics very low acoustics energy - Very High Frequencies