Detachable and adjustable sound and feedback control device for stringed musical instruments having a hollow body with a sound hole

A detachable and adjustable sound and feedback control device for a stringed musical instrument having a hollow body including a top wall having a sound hole for the ingress and egress of musical sounds produced by the string instrument when the strings are plucked, said control device comprising:

• a) a base member having a top surface and a bottom surface and having at least one opening penetrating said top and bottom surfaces for the passage of musical sound and adapted to be superimposed over said sound hole in said top wall under the strings of said musical instmment whereby said sound hole and said opening in said base member are normally in communication for the passage of musical sounds therethrough when the strings are plucked;
• b) means mounted on said base member selectively detachably engageable to said top wall to retain said sound and feedback control device operatively associated with said sound hole;
• c) a dial rotatably mounted on said base member adjacent said top surface of said base member and having at least one opening therein, said dial being selectively rotatably adjustable to place said at least one dial opening in superposed sound communicating relationship with said at least one opening in said base member or to occlude said at least one opening in said base member;
• and
• d) wherein said base member is provided with a latterly extending portion disposed on said top wall spaced from said sound hole, and pockets are provided on said latterly extending for the reception of one or more guitar picks.

A detachable and adjustable sound and feedback control device for a stringed musical instrument having a hollow body including a top wall having a sound hole for the ingress and egress of musical sounds produced by the string instrument when the strings are plucked, said control device comprising:

• a) a base member having a top surface and a bottom surface and having at least one opening penetrating said top and bottom surfaces for the passage of musical sound and adapted to be superimposed over said sound hole in said top wall under the strings of said musical instrument whereby said sound hole and said opening in said base member are normally in communication for the passage of musical sounds therethrough when the strings are plucked;
• b) means mounted on said base member selectively detachably engageable to said top wall to retain said sound and feedback control device operatively associated with said sound hole;
• c) a dial rotatably mounted on said base member adjacent said top surface of said base member and having at least one opening therein, said dial being selectively rotatably adjustable to place said at least one dial opening in superposed sound communicating relationship with said at least one opening in said base member or to occlude said at least one opening in said base member;
• d) wherein said base member includes a pivotal axis and is provided with two openings on opposite sides of said pivotal axis;
• and
• e) wherein said two openings are generally triangular in configuration with the apices of the triangular openings being adjacent said pivotal axis and the sides of said openings opposite the apices being arcuate and coincident with the periphery of said sound hole.

A detachable and adjustable sound and feedback control device for a stringed musical instrument having a hollow body including a top wall having a sound hole for the ingress and egress of musical sounds produced by the string instrument when the strings are plucked, said control device comprising:

• a) a base member having a top surface and a bottom surface and having at least one opening penetrating said top and bottom surfaces for the passage of musical sound and adapted to be superimposed over said sound hole in said top wall under the strings of said musical instrument whereby said sound hole and said opening in said base member are normally in communication for the passage of musical sounds therethrough when the strings are plucked;
• b) means mounted on said base member selectively detachably engageable to said top wall to retain said sound and feedback control device operatively associated with said sound hole;
• c) a dial rotatably mounted on said base member adjacent said top surface of said base member and having at least one opening therein, said dial being selectively roratably adjustable to place said at least one dial opening in superposed sound communicating relationship with said at least one opening in said base member or to occlude said at least one opening in said base member;
• and
• d) wherein said means mounted on said base member detachably engageable to said top wall to retain said sound and feedback control device operatively associated with said sound hole comprises at least two elastically resilient and compressible keeper blocks spaced circumferentially on the underside of said base member and compressible through said sound hole to impinge an the periphery thereof to detachably retain said sound and feedback control device superimposed over said sound hole.

A detachable and adjustable sound and feedback control device for a stringed musical instrument having a hollow body including a top wall having a sound hole for the ingress and egress of musical sounds produced by the string instrument when the strings are plucked, said control device comprising:

• a) a base member having a top surface and a bottom surface and having at least one opening penetrating said top and bottom surfaces for the passage of musical sound and adapted to be superimposed over said sound hole in said top wall under the strings of said musical instrument whereby said sound hole and said opening in said base member are normally in communication for the passage of musical sounds therethrough when the strings are plucked;
• b) means mounted on said base member selectively detachably engageable to said top wall to retain said sound and feedback control device operatively associated wit said sound hole;
• c) a dial rotatably mounted on said base member adjacent said top surface of said base member and having at least one opening therein, said dial being selectively rotatably adjustable to place said at least one dial opening in superposed sound communicating relationship with said at least one opening in said base member or to occlude said at least one opening in said base member;
• and
• d) wherein a layer of cushioning material is secured to the bottom surface of said base member so as to be interposed between said base member and said top wall of said musical instrument when said control device is mounted in said sound hole.

A detachable and adjustable sound and feedback control device for a stringed musical instrument having a hollow body including a top wall having a sound hole for the ingress and egress of musical sounds produced by the string instmment when the strings are plucked, said control device comprising:

• a) a base member having a top surface and a bottom surface and having at least one opening penetrating said top and bottom surfaces for the passage of musical sound and adapted to be superimposed over said sound hole in said top wall under the strings of said musical instrument whereby said sound hole and said opening in said base member are normally in communication for the passage of musical sounds therethrough when the strings are plucked;
• b) means mounted on said base member selectively detachably engageable to said top wall to retain said sound and feedback control device operatively associated with said sound hole;
• c) a dial rotatably mounted on said base member adjacent said top surface of said base member and having at least one opening therein, said dial being selectively rotatably adjustable to place said at least one dial opening in superposed sound communicating relationship with said at least one opening in said base member or to occlude said at least one opening in said base member;
• and
• d) wherein said dial is provided with a top surface and a bottom surface, and a layer of cushioning sound absorbing material is secured to the bottom surface of said dial adjacent said at least one opening whereby when said dial is rotated to occlude said at least one opening in said base member said sound absorbing material absorbs sound impinging thereon and when rotated to open said sound hole said cushioning and sound absorbing material impinges on the top surface of said base member.