Abstract
Potential of acoustic impulse method for determining the quality of two nectarine cultivars (Diamond Ray and Venus) fruit was studied. Among acoustic properties (resonant frequency, stiffness, peak width), only peak widths was significantly different (P≤0.001) between cultivars. Standard quality measurements (fruit weight, firmness, stone share, soluble solids concentration (SSC), titratable acidity (TA), SSC/TA ratio), only stone share (P≤0.001), TA (P≤0.01) and SSC/TA (P≤0.05) was significantly different between cultivars. No clear acoustic signal could be observed in measured fruits. There was no significant correlation between the stiffness and firmness and any other quality characteristics. Major reason is probably a stone resonance which distorts acoustic signal. Based on the above study, acoustic impulse method can not be used for nectarine fruit.
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