Patent ID: 6665413
Filing Date: 2003-12-16
Classification: H04R

Abstract:
An infrasonic sound power generator for producing clean sinusoidal signals in an audible range of 6 to 20 Hz, comprising:a container; at least one vibrator disposed within the container; an internal baffle disposed within the container; a first vent and a second vent secured to the container and extending outside the container; the first vent having a variable length and being tunable to a desired frequency by adding an extension; at least one of the first vent or the second vent being closed by a cap; and wherein air inside the container resonates at a Helmholtz frequency in accordance with the following equation: Hz (Helmholtz frequency)=C*[SQRT(S/((L+X)*V))]/(2*pi), where C represents the speed of sound, S represents a vent area, L represents a vent length, R represents a vent radius, X represents 1.5*R, and V represents a container volume.