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The 20 Hz to 20 kHz range tends to be the general range for human ears. This range is reduced with age, especially in males. In older males 13 kHz tends to be the upper end of the audible range. The human ear does not have a flat frequency response over the audible range. Certain frequencies tend to be attenuated while others are magnified. A-weighting attempts to compensate for this by discounting frequencies which the human ear is less sensitive to. It places priority on sounds between 1 kHz and 7 kHz. Some CUI Devices speakers specify SPL using the A-weight system, also known as dBA.
PTM Published on: 2011-10-25
PTM Updated on: 2021-10-11
