The ‘A’ Frequency Weighting

Ken Scannell

New Zealand Acoustics, 16(2), pp.19- 21 . (2003).

The ‘A’ frequency weighting is used extensively in many acoustical noise measurements. Although almost exclusively used, it is often misunderstood or incorrectly defined even by those who would be expected to have a better knowledge. It is commonly stated in glossaries, even in official documents or textbooks on acoustics or noise, as “a scale that simulates the response of the human ear” or similar erroneous nonsense.