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Olfactometry is a somewhat misleading term. Although it implies that it relates to the measurement of olfactory sensitivity, it is used to describe a technique that allows presentation of odorous stimuli so that the subjects' olfactory function can be assessed. Thus, olfactometry relates to methods of stimulus presentation. Typical problems described in this entry that are associated with odor presentation include the control of concentrations reaching the olfactory receptors in the olfactory cleft, the change of stimulus concentration over the time of administration time, or the stability of odor concentrations during repeated exposures.

For many psychophysical studies, odors are presented, for example, in glass jars, in odorized pens, or as microencapsulated odors glued to paper that are released through scratching them with a pencil. There is ...

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