Assessment of acoustic-mechanical measurements for texture of French fries: Comparison of deep-fat frying and air frying

Gouyo Teko, Mestres Christian, Maraval Isabelle, Fontez Bénédicte, Hofleitner Céline, Bohuon Philippe. 2020. Assessment of acoustic-mechanical measurements for texture of French fries: Comparison of deep-fat frying and air frying. Food Research International, 131:108947, 10 p.

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Abstract : The aim of this study was to develop an instrumental method for measuring the texture of French fries and correlated it with sensory measurements. For seven samples of French fries with different crispness levels, a cone penetrometer test was conducted simultaneously with microphone recording of sound emissions. A descriptive sensory analysis was also performed on these samples. The results showed that the number of sound peaks, the linear distance of sound peaks, the area under the sound-displacement curve and the mean sound pressure were strongly positively correlated (r ≥ 0.80; P-value < 0.02) with the crispness of the crust descriptor. The number of force peaks and the linear distance of the force peaks were correlated with all the acoustic parameters. These two mechanical parameters and the maximum force, were not correlated with crispness of the crust (r = 0.50; P-value < 0.05) but strongly correlated with product hardness (r = 0.9; P-value < 0.01). However, the combination of the acoustic and mechanical parameters appeared suitable for measuring the texture of French fries. An analysis of the variable importance by random forest showed that the main parameters for quantifying the texture differences were the number of sound peaks and the maximum force. The use of this instrumental method and sensory analysis showed that the deep-fat fried products were crispier than the air fried products with the same water loss.

Mots-clés Agrovoc : Aliment préparé, French fries [EN], Propriété acoustique, Analyse organoleptique, Friture, cooking methods [EN], Propriété physicochimique

Mots-clés libres : French fries, Hot air frying, Texture, Sensory analysis, Crispness, Acoustic properties

Classification Agris : Q01 - Food science and technology - General aspects

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

Auteurs et affiliations

  • Gouyo Teko, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Mestres Christian, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Maraval Isabelle, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Fontez Bénédicte, Montpellier SupAgro (FRA)
  • Hofleitner Céline, SEB. Ecully-Food Science (FRA)
  • Bohuon Philippe, Montpellier SupAgro (FRA) - auteur correspondant

Source : Cirad-Agritrop (

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