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
Lehti: 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
Julkaisun avoimuus kirjaamishetkellä: Avoimesti saatavilla
Julkaisukanavan avoimuus : Kokonaan avoin julkaisukanava
Verkko-osoite: https://doi.org/10.1515/cdbme-2023-1002
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/181525991
Rinnakkaistallenteen lisenssi: CC BY
Rinnakkaistallennetun julkaisun versio: Kustantajan versio
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.
Avainsanat:
acoustic food, bubbles in cheese, poroacoustics, soft porous structure, Squeaky cheese, μCT
Ladattava julkaisu This is an electronic reprint of the original article. |