Whistle with non-spherical pea

摘要

A whistle that includes a pea formed of two semi-spheres coupled together to form a non-spherical shape. The non-spherical shape results in unpredictable movement of the pea in a chamber of the whistle so as to produce a trill. An interior surface of the chamber may include flat portions that further cause unpredictable movement of the pea to produce the trill.

主权项

1. A whistle comprising:
a chamber; and a pea; wherein:
the pea comprises a first semi-sphere and a second semi-sphere;a flat portion of the first semi-sphere is coupled to a flat portion of the second semi-sphere;an axis of the first semi-sphere is offset from an axis of the second semi-sphere thereby providing the pea a non-spherical shape;the pea is positioned in the chamber; andresponsive to a flow of air into the chamber, the shape of the pea causes the pea to bounce in an unpredictable direction from an interior surface of the chamber to produce a trill.