Abstract
In the food industry, objectively characterizing the degree of ripeness of fruit and vegetables is often crucial to maintain quality standards. Buying these products at a typical food market, the customer has to trust his own senses such as smell, touch or visual impression in order to determine the right degree of ripeness. Occasionally, one can find very experienced customers who use the sound a certain fruit creates when knocking against it. This "hearing of fruits' sound" gives rise to develop new methods for objectively determining the degree of ripeness. Many interesting facts and relations can be recognized. First, it is possible to excite a structure such as a fruit. Second, the excitation is strong enough to create a structural response and third, the structural response is effective enough to create an audible sound to the human ear. In this paper, two examples of fruit, a canary melon and an apple, are excited with a shaker and the structural response is measured utilizing a 2D-Laser-Scanning-Vibrometer. The subsequent experimental modal analysis reveals natural eigenfrequencies and mode shapes of the test samples. With this information novel objective criteria can be developed to improve the ability to reliably characterize the degree of ripeness.
Originalsprache | Englisch |
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Seiten | 644-647 |
Seitenumfang | 4 |
Publikationsstatus | Veröffentlicht - 21 Aug. 2016 |
Veranstaltung | 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, Deutschland Dauer: 21 Aug. 2016 → 24 Aug. 2016 |
Konferenz
Konferenz | 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 |
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Land/Gebiet | Deutschland |
Ort | Hamburg |
Zeitraum | 21/08/16 → 24/08/16 |