9 Sensory Properties of Foods
Learn how people perceive food through its sensory properties, how sensory tests describe differences and consumer responses, and why sensory qualities cannot establish food safety.
What measures
examines how people experience food through sight, smell, , touch, and sometimes hearing. It helps food scientists describe product characteristics, identify differences between foods, and measure how much consumers like or accept them. Unlike an instrument that measures one physical or chemical property, a sensory test measures human responses under planned conditions.
The sensory properties of food
includes color, size, shape, surface, clarity, and visible consistency. It creates an initial impression: a glossy surface may suggest moisture, while an evenly browned crust may signal a familiar baked .
is detected when volatile compounds reach olfactory receptors. People sense it before eating and through retronasal smell, when aromas travel from the mouth to the nose during chewing. contributes strongly to .
receptors detect sweetness, sourness, saltiness, bitterness, and umami. is not the same as : combines with and other sensations.
Texture includes crispness, hardness, chewiness, smoothness, and viscosity. Mouthfeel includes creaminess, dryness, astringency, and warmth. Sounds, such as a crisp crunch, may also contribute to the eating experience.
How sensory properties interact
Sensory properties interact. A food’s color can shape expectations about its , while and combine to create a more complete impression. Sensory responses also vary with a person’s experience, preferences, culture, familiarity with the food, and the context in which it is served.
Choosing a sensory test
The test method depends on the question being asked.
ask whether people can detect a difference between samples, such as whether a reformulated soup tastes different from the original.
uses trained panelists and agreed-upon terms to identify and rate sensory attributes, such as the intensity of a toasted or the firmness of a snack. It creates a detailed sensory profile.
ask people from the intended consumer group how much they like a product or whether they would choose it. Rating scales, including , can measure liking. Questionnaires can also ask which attributes people notice or prefer.
For example, a company comparing two yogurt recipes might first use a trained panel to describe differences in sourness, fruit , and thickness. It could then ask target consumers to rate how much they like each yogurt. The first test describes the products; the second measures consumer response.
Making sensory results meaningful
Meaningful results depend on planned testing conditions. Samples are commonly prepared and served in consistent portions and conditions. Neutral sample labels and controlled serving order can reduce bias.
Researchers select panelists and methods to suit the goal: trained assessors describe sensory qualities, while target consumers indicate preference and acceptance.
is not a safety test
can help identify changes in quality, but , smell, and cannot establish whether food is safe. Harmful pathogens may be present without changing a food’s sensory properties. depends on appropriate handling, storage, and cooking practices—not on tasting or smelling food to check it.