Hedonic Tone Assessments

HomeHedonic Tone Assessments

WHAT ARE HEDONIC TONE ASSESSMENTS?

At Silsoe Odours Ltd we not only measure the concentration and dispersion of odours; we also measure the level of pleasure, or displeasure, that specific odours create once brought in contact with the human nose. Businesses dealing with the preparation of foodstuffs know that the bacon we love to smell sizzling in the frying pan for breakfast, is odious to us if we encounter it in the pre-supermarket, processing phase.

Hedonic tone assessments are invaluable to businesses who are managing odours that have the capacity to negatively impact local communities. Knowing how an odour can affect residents nearby, allows for effective odour management and planning.

HEDONIC TONE ASSESSMENTS

Perceived Hedonic Tone Scores

Very Pleasant +4
Pleasant +3
Moderately Pleasant +2
Mildly Pleasant +1
Neutral Odour / No Odour   0
Mildly Unpleasant  -1
Moderately Unpleasant  -2
Unpleasant  -3
Very Unpleasant  -4

HOW DO HEDONIC TONE ASSESSMENTS WORK?

The assessment derives from the German guideline VDI 3882 Determination of Hedonic Odour Tone. The guideline works with qualitative descriptors which human subjects are asked to assign to samples administered using an olfactometer. Results are determined by using an hedonic tone scale of +4 to -4. An odour registering at -4 on the scale will provide an ‘extremely unpleasant’ definition for a specific odour. The hedonic definition is understood to be a subjective testing process, which means that the results will vary from one test subject to another, but clear indications of the impact of odours on a human population can be derived using this methodology.

THE BENEFITS TO BUSINESS OF USING HEDONIC TONE ASSESSMENTS

A business that is aware of the hedonic definition of its odour emissions, can plan appropriately in relation to its local environment. This is one of the tests Silsoe Odours Ltd will undertake when determining the ‘safe zone’ required between new housing developments and local industry. Whilst many of the odours emitted as a by-product of industrial processes can be tolerated, in quite high concentrations, those registering low on the hedonic tone scale are likely to be the cause of vociferous complaints as they threaten the quality of life for those subjected to them.

If your business could benefit from Hedonic Tone Assessments, call our team today on 01525 860 222

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