| 摘要 |
PURPOSE: A whistle is provided to transfer signal sound by guiding wind through having a protrusion and to generate various tones with one whistle. CONSTITUTION: A whistle comprises an air inducing pipe(2b) formed on a left casing unit(2); a resonance unit(2c) interlocked with the air inducing pipe; an air through port(2d) discharging air of the resonance unit by being formed on an upper portion of the resonance unit; a holding unit improving holding force by being installed on the resonance unit; a left combining unit(2a) combined to a right combining unit(4a) of a right casing unit(4); a through hole passed through string; and balls(B1,B2) contained in the resonance unit. The right combining unit of the right casing unit is protruded corresponding to the left combining unit of the left casing unit. Thereby, the whistle transfers a signal sound by inducing the air through having a protrusion unit. Moreover, the whistle generates various tones with one whistle.
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