EJPAU 2006. Zdunek A. , Ranachowski Z. ACOUSTIC EMISSION IN PUNCTURE TEST OF APPLES DURING SHELF-LIFE

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 4

Topic:

Agricultural Engineering

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Zdunek A. , Ranachowski Z. 2006. ACOUSTIC EMISSION IN PUNCTURE TEST OF APPLES DURING SHELF-LIFE, EJPAU 9(4), #30.
Available Online: http://www.ejpau.media.pl/volume9/issue4/abs-30.html

ACOUSTIC EMISSION IN PUNCTURE TEST OF APPLES DURING SHELF-LIFE

Artur Zdunek¹, Zbigniew Ranachowski²
¹ Institute of Agrophysics, Polish Academy of Sciences, Lublin, Poland
² Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland

ABSTRACT

Sound is important property used for consumer for food quality evaluation. Most of the sound created during eating is bone-conducted. In this research a contact acoustic emission together with puncture test are used for observation of changes of apples quality during shelf-life.

The new device for acoustic emission measurements during puncturing of apple tissue allows obtaining acoustic parameters simultaneously with firmness and toughness. The acoustic events (number of bursts) and acoustic energy correlates with the mechanical parameters, however they are more sensitive for shelf-life storage than the mechanical one. It was confirmed that fresher and stored in better conditions apples emit louder (higher AE energy) and more dense (higher number of events) sound. The sound created during puncturing has wide range of frequencies. In general, the relationships obtained are similar using audio or ultra sound band. However, using both of them gives advantage of controlling unexpected background noise affecting measurements.

Key words: Acoustic emission, crispness, texture, apple.

Artur Zdunek
Institute of Agrophysics,
Polish Academy of Sciences, Lublin, Poland
Doswiadczalna 4, 20-290 Lublin, Poland
email: azdunek@demeter.ipan.lublin.pl

Zbigniew Ranachowski
Institute of Fundamental Technological Research,
Polish Academy of Sciences, Warsaw, Poland
Swi?krzyska 21, Warsaw, Poland
email: zranach@ippt.gov.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.