| 摘要 |
A sound producing device comprises an outer tube having an open end and a closed end, a plunger which fits inside the open end of the outer tube, and an amount of flexile material arranged between an outer surface of the plunger and an inner surface of the outer tube when the plunger is inserted in the outer tube. Movement of the plunger within the outer tube creates a pressure or vacuum, forcing air past the flexile material and thereby creating an amusing sound. The movement may also create an entertaining visual effect if the outer tube is made of a transparent material. The device may be configured to include a guided plunger having a longitudinal guide shaft therethrough which is adapted to receive a centering guide pin associated with the outer tube. Other embodiments may incorporate multiple tubes to produce distinctly different amusing sounds, or a sound enhancer tube to produce an amusing sound with richer tone.
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