Finney E E Jr.Vibrational techniques for testing fruit firmness[J].Journal of Texture Studies.1972,3:263-283
[3]
Armstrong P R,Zapp H R,Brown G K.Impulse excitation of acoustic vibration in apples for firmness determination[J].Transactions of the ASAE.1990,33:1353-1359
[4]
Duprat F,Grotte M,Pietri E.The acoustic impulse response method for measuring the overall firmness of fruit[J].Journal of Agricultural Engineering Research.1997,66:251-259
Roudot A C,Duprat F,Wenian C.Modelling the response of apples to loads[J].Journal of Agricultural Engineering Research.1991,48:249-259
[7]
Abbott J A,Affeldt H A,Liljedahl L A.Firmness measurement of stored’Delicious’apples by sensory methods,magness-taylor,and sonic transmission[J].Journal of the American Society for Horticultural Science.1992,117(4):590-595
[8]
Abbott J A,Massie D R.Nondestructive sonic measurement of kiwifruit firmness[J].Journal of the American Society for Horticultural Science.1998,123(2):317-322
[9]
Yamamoto H,Iwamoto M,Haginuma S.Acoustic impulse response method for measuring natural frequency of intact fruits and preliminary application to internal quality evaluation of apples and watermelons[J].Journal of Texture Studies.1980,11(2):117-136
[10]
Cooke J R,Rand R H.A mathematical study of resonance in intact fruits and vegetables using a 3-media elastic sphere model[J].Journal of Agricultural Engineering Research.1973,18:141-157
[11]
De Belie N,Schotte S,Lammertyn J.Firmness changes of pear fruit before and after harvest with the acoustic impulse response technique[J].Journal of Agricultural Engineering Research.2000,77(2):183-191
