A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Micro-computed tomography shows silent bubbles in squeaky mozzarella
Tekijät: Nurkkala Elina, Hannula Markus, Carlson Craig S., Hopia Anu, Hyttinen Jari, Postema Michiel
Kustantaja: Walter de Gruyter GmbH
Julkaisuvuosi: 2023
Journal: Current directions in biomedical engineering
Tietokannassa oleva lehden nimi: Current Directions in Biomedical Engineering
Vuosikerta: 9
Numero: 1
Aloitussivu: 5
Lopetussivu: 8
ISSN: 2364-5504
DOI: https://doi.org/10.1515/cdbme-2023-1002
Verkko-osoite: https://doi.org/10.1515/cdbme-2023-1002
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/181525991
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.
Ladattava julkaisu This is an electronic reprint of the original article. |