E679-04

Detection threshold (DT)

Detection threshold is essentially the minimum amount of odorant that can be perceived (smelled).  This minimum amount represents the odour concentration and is a measurement of 1 OU (1 odour…

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Geometric mean

An average or mean calculated by taking the nth root of the product of n numbers. The geometric mean is used in the EN13725 and E679-04 standards in order to…

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