odour measurements

Odour Annoyance

Annoyance with respect to odour is a set of complex reactions that takes place when repeated or continued exposure to that odour takes place.  Ultimately, annoyance may lead to a…

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odour concentration

number of odour units present in one meter cubed at standard conditions. Can only be assessed at 1 OUE/m3. The odour concentration is then expressed as multiple of 1 OUE/m3….

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Odour intensity

A measure of how strong an odour may be based on an initial perception.  Odour intensity and odour concentration have a non-linear relationship.  For instance, if two distinct odours are…

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Odour Source

A location or object that emanates odours.  Sources can be divided by point, area, or volume sources that are of either passive, active or fugitive type.  For example, a rectangular…

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Odour unit

The odour unit is a unit of measure of odour concentration.  It is defined as follows: American and Australian Odour Unit (OU) One odour unit is a dimensionless number where…

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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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Olfactory

Pertaining to the sense of smell.  It is the least understood of the five senses.  No device exists that has the ability to measure odour response as the human nose. …

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