| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems with an electronic whistle used for training of humans and animals as a signal for actions by generating a sound pattern, that such electronic whistle does not deal with a case that the sound components of a non-audible region for the human are effective, like a dog whistle, and also even if the sound of the non-audible region is reproducible, the sound of the non-audible region is not recognized by a user. SOLUTION: The electronic whistle is provided with: an audible region acoustic wave generating means for generating the sound of the audible region of the human; a non-audible region acoustic wave generating means for generating the sound of the non-audible region; and a means for outputting the two acoustic waves. COPYRIGHT: (C)2004,JPO&NCIPI
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