Patent Publication Number: US-4057124-A

Title: Sound suppressor

Description:
GENERAL DESCRIPTION OF INVENTION 
     In walkie-talkie radios used by truck drivers in highway transportation, the noise from the truck often obscures the voice of the individual. The present invention provides a noise suppressor that will prevent such ambient noise from interfering with the voice. 
     OBJECTS OF THE INVENTION 
     It is an object of the invention to provide a sound suppressor for use on walkie-talkie radios and the like. 
     Another object of the invention is to provide a sound suppressor that is simple in construction, economical to manufacture and simple and efficient to use. 
     With the above and other objects in view, the present invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportions, and minor details of construction without departing from the spirit or sacrificing any of the advantages of the invention. 
    
    
     GENERAL DESCRIPTION OF DRAWINGS 
     FIG. 1 is a front view of the suppressor shown in a housing according to the invention. 
     FIG. 2 is a front view of the suppressor shown with the housing cover removed. 
     FIG. 3 is a front view of the suppressor shown partly in cross section. 
     FIG. 4 is a longitudinal cross-sectional view of the suppressor according to the invention. 
     FIG. 5 is an enlarged partial cross-sectional view taken on line 5--5 of FIG. 4. 
    
    
     DETAILED DESCRIPTION OF DRAWINGS 
     Now, with more particular reference to the drawings, the sound suppressor is generally indicated at 10 with a round aluminum disc 11 and two round discs 12 made of paper-towel-like material or some other soft, paper-like material supported with the foil material sandwiched between the paper-towel-like material. The paper is a loose mat-type fiber similar to a blotter paper and has rows of deformations in it to increase the sound absorbing area. The paper, supported on both sides of the foil disc, tends to attenuate the noise. 
     Two annular discs 14 and 15 are supported on each side of the paper-towel-like material. The outer annular discs, the aluminum discs and the paper discs may be held together around the outer periphery by adhesive material. 
     In use, one of the annular members 14 or 15 is supported against the voice passage in the microphone and it may be held in place by pressure-sensitive adhesive. As an alternative, the entire suppressor could be supported under a metal ring connected to the microphone by means of suitable fasteners. 
     The foregoing specification sets forth the invention in its preferred practical forms but the structure shown is capable of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.