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Article Dans Une Revue Current Directions in Biomedical Engineering Année : 2023

Micro-computed tomography shows silent bubbles in squeaky mozzarella

Résumé

The sound of food is of influence on how its flavour is perceived. Although rarely studied in psychoacoustics, cheese may have a resonating internal structure in the audible spectrum. It has been speculated that this structure or small bubbles that are formed as a result of fermentation are responsible for creating audible acoustic responses. The purpose of this study was to design a mechanical methodology to create audible acoustics from cheese samples and to quantify bubble presence in a sample. One hundred and two samples of mozzarella cheese with 1.5±0.4-cm³ volumes were subjected to shear from a wetted steel blade, whilst orthogonal force, blade acceleration, and acoustic response were continuously monitored. In addition, micro-computed tomography was performed. It was found that under our measurement conditions, mozzarella was forced to squeak in 10% of the experiments, at fundamental squeak frequencies up to 2 kHz, which indicates that the acoustics come from a resonating porous structure, rather than from resonating bubbles. The micro-computed tomography showed a bubble density of 51 cm⁻³. This low bubble density may account for the absence of a high-frequency component in the spectra analysed. Our results confirm the presence of small bubbles in squeaky mozzarella, but these generate frequencies much higher than those recorded.
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Origine : Publication financée par une institution
Licence : CC BY - Paternité

Dates et versions

hal-04215162 , version 1 (22-09-2023)
hal-04215162 , version 2 (29-09-2023)

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Elina Nurkkala, Markus Hannula, Craig Stuart Carlson, Anu Hopia, Jari Hyttinen, et al.. Micro-computed tomography shows silent bubbles in squeaky mozzarella. Current Directions in Biomedical Engineering, 2023, Proceedings of the 57th Annual Meeting of the German Society of Biomedical Engineering (26 – 28 September 2023, Duisburg), 9 (1), pp.5-8. ⟨10.1515/cdbme-2023-1002⟩. ⟨hal-04215162v2⟩
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