| 摘要 |
PROBLEM TO BE SOLVED: To provide a whistle generating a beat sound which has high sound pressure, rises quickly, and gives high attention attracting effect by increasing generated higher harmonics. SOLUTION: This whistle has a blow hole 4, 1st and 2nd resonance chambers 5a and 5b in which air is blown from the blow hole 4 through 1st and 2nd blow paths 6a and 6b, and 1st and 2nd mouthpieces 7a and 7b which are formed of openings formed between the blow paths and resonance chambers and are further provided with 1st and 2nd deflectors 9a and 9b which have wall surfaces 10a and 10b at right angles to the blow paths at the rear ends of the openings of the mouthpieces so as to increase higher harmonics, raise the sound pressure, and quicken the rising of the sound by changing flows of air blown out of the blow paths.
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