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Characterisation of human behaviour during odour perception

D G Laing

    Perception
    |January 1, 1982
    PubMed
    Summary

    Understanding human sniffing patterns is key to developing better odor measurement tools. Key factors like total volume, time, and number of sniffs vary with odor concentration, guiding olfactometer design.

    Area of Science:

    • Olfactory Science
    • Human Sensory Perception
    • Psychophysics

    Background:

    • Optimal odor perception factors remain undefined, hindering standardized olfactory response measurement.
    • Current olfactometers may not align with human inhalation needs during sniffing.
    • Varied sniffing techniques suggest underlying patterns for optimal odor detection.

    Purpose of the Study:

    • To investigate human inhalation rates, volumes, sniff number, and duration during olfactory tests.
    • To identify key parameters influencing odor perception and sampling.
    • To inform the design of more effective olfactometers.

    Main Methods:

    • Twenty-three human subjects participated in odor-threshold and intensity tests using specific odorants.
    • A hot-wire anemometer within an air-dilution olfactometer measured inhalation parameters.

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  • Sniffing patterns were analyzed across different odor types and concentrations.

    • Main Results:

    • Individual sniffing techniques varied but showed consistent patterns for different odors and tasks.
    • Odor concentration correlated with total sampled volume, total sampling time, and number of sniffs.
    • Maximum inhalation rate remained stable, irrespective of odor characteristics.

    Conclusions:

    • Sniffing parameters like volume, time, and number of sniffs are crucial for odor concentration assessment.
    • Human inhalation requirements during sniffing episodes are often unmet by current olfactometer designs.
    • Observed commonalities in sniffing techniques suggest they approximate optimal odor perception.