Patent ID: 6491564
Filing Date: 2002-12-10
Classification: A63H

Abstract:
An amplifier instrument comprising:an input chamber presenting an input aperture adapted for entry of user forced air therein; a downstream plenum in communication with said input chamber, a downstream housing presenting a chamber in communication with said plenum, said downstream housing chamber presenting a first end and a second open end extending beyond said plenum; a diaphragm stretched across said first end of said downstream housing chamber; a cap engaging said second end of said downstream housing chamber, said cap having a downstream end presenting a chamber between said diaphragm and said downstream cap end; an aperture in said cap for communicating said diaphragm to air; an outlet housing in air communication with said input chamber, said outlet housing offset from an air path between said input chamber and said downstream housing, and presenting a chamber with a first outlet aperture adapted for discharge of a portion of the user forced air therethrough, the user forced air entering said input aperture vibrating said downstream diaphragm to produce a sound, a size of said input, outlet and cap apertures regulated by the hand or fingers of a user for influencing the aural characteristics of the sound produced by said vibrating of said downstream diaphragm.