hedonic tone

EN 13725 – YES/NO Mode

The assessor is asked to evaluate gas presented from a specific port and to indicate if an odour is perceived ( YES/NO). The assessor is aware that in some cases…

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FIDOL

FIDOL represents frequency, intensity, duration, offensiveness and location.  FIDOL is used as a means to characterize the effects of an odour annoyance. Characterize an odour by its: Frequency – how…

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New Source Review (NSR)

A Clean Air Act requirement that State Implementation Plans must include a permit review,  which applies to the construction and operation of new and modified stationary sources in Non-attainment areas, to…

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Olfactometer

A device that is used to determine odour concentration, odour intensity and hedonic tone.  This is achieved by diluting the odour sample with odour-neutral air, which is then presented to…

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Olfactometry

The process of analyzing the responses of odour(s) using human subjects (assessors).  The responses can be used to determine the odour concentration or odour intensities or hedonic tone of the…

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