468-weighting is also used in weighted distortion measurement at 1 kHz. Weighting the distortion residue after removal of the fundamental emphasises high-order harmonics, but only up to 10 kHz or so where the ears response falls off. This results in a single measurement (sometimes called distortion residue measurement) which has been claimed to correspond well with subjective effect even for power amplifiers where crossover distortion is known to be far more audible than normal THD(Total harmonic distortion) measurements would suggest.
Measurements of microphone noise are easier using 468-weighting because it emphasises the audible noise more in comparison to low-frequency noise.[dubious ] A-weighted microphone measurements require extremely quiet conditions to avoid the effects of slow pressure variations caused by wind and air conditioning.[citation needed]
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