Relationship between Carrot Firmness with Acoustic Signal Characteristics

摘要

The purpose of this study is to investigate the relationships between carrot firmness with acoustic signal characteristics. The results showed that carrot firmness was positively related with the wave form index (r=0.72, P<0.01) and sound intensity (r=0.81, P<0.01) of the acoustic signals in the time domain. The overall frequency bands were distributed around 0-10,000Hz by Hilbert-Huang transform. The carrot firmness was negatively related with the relative energy in high-frequency domain (r=-0.73, P<0.01).