ACOUSTIC IMPULSE RESPONSE METHOD FOR MEASURING NATURAL FREQUENCY OF INTACT FRUITS AND PRELIMINARY APPLICATIONS TO INTERNAL QUALITY EVALUATION OF APPLES AND WATERMELONS |
| |
| Authors: | HIROMICHI YAMAMOTO MUTSUO IWAMOTO SHIKO HAGINUMA |
| |
| Affiliation: | National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, Yatabe-machi, Tsukuba-gun, Ibaraki-ken 305, Japan |
| |
| Abstract: | A nondestructive textural quality measurement technique that uses an acoustic property was studied for apples and watermelons. By means of digital Fourier analysis, the natural frequencies of intact fruits are obtained from the sound which is produced by hitting them with a wooden ball pendulum. The reliability of this method was confirmed. This method requires simpler instrumentation than the sonic vibrating resonance method. |
| |
| Keywords: | |
|
|
