SOUND TREATMENT OF DEVICE FOR REPELLING BIRD AND ANIMAL WITH DIGITAL SOUND

摘要

PROBLEM TO BE SOLVED: To effectively prevent a vermin damage by generating the original avoidance sounds of organisms by digital technology.;SOLUTION: An albumen vermin damage can be prevented by digitally treating the original self vocalized avoidance voices of organisms without being recognized by the ears of man. Without causing the pollution of noises such as the noises of explosion devices, the vermin damage can be prevented to increase a crop yield per 10 are. In order to overcome the global food shortage due to population explosion which may be caused in the 21st century, it is necessary to even slightly increase the yield of rice which is a crop having a high population-supporting force per 10 are. The method is useful for increasing the crop yield per 10 are.;COPYRIGHT: (C)2001,JPO