Expanded uncertainty. quantity defining an interval about the result of a measurement that may be expected to encompass a large fraction of the distribution of values that could reasonably be attributed to the measurand.
Introduction. 'Phantosmia' is the medical term for an imaginary odour (phantom smell) . It is also known as an olfactory hallucination. The smell is unique to the person and is usually unpleasant, spoiling the taste of any food or drink consumed.It can be in one or both nostrils.ess commonly, the cause of phantosmia is either nerve cells sending abnormal smell signals to the brain, or a problem with the brain itself. This may be the result of: 1  a disease affecting the nervous system, such as epilepsy, Parkinsonâs disease or Alzheimerâs disease. 2  a stroke.
Dysosmia can be classified as either parosmia (also called troposmia) or phantosmia. Parosmia refers to a distortion in the perception of an odorant.Odorants smell different from what one remembers.Phantosmia refers to the perception of an odor when thereâs no actual odorant present.ysosmia is a disorder described as any qualitative alteration or distortion of the perception of smell. Qualitative alterations differ from quantitative alterations, which include anosmia and hyposmia.