Abstract: An improved comb for a harmonica including one or more check valves mounted within the comb for improving performance and tonality and simplifying construction. The use of check valves mounted over valve slots has been previously disclosed as a method of increasing the musical range and volume of the instrument. This invention incorporates check valves but locates them within the comb of the harmonica. By placing all the check valves within the comb, construction of the harmonica is greatly simplified, air loss between various components is greatly decreased, and check valves are removed from close proximity with reeds thereby decreasing interference with the reeds, increasing volume and performance, and increasing the resonance of overtones.

Abstract: An improved comb for a harmonica including one or more check valves mounted within the comb for improving performance and tonality and simplifying construction. The use of check valves mounted over valve slots has been previously disclosed as a method of increasing the musical range and volume of the instrument. This invention incorporates check valves but locates them within the comb of the harmonica. By placing all the check valves within the comb, construction of the harmonica is greatly simplified, air loss between various components is greatly decreased, and check valves are removed from close proximity with reeds thereby decreasing interference with the reeds, increasing volume and performance, and increasing the resonance of overtones.

Abstract: A harmonica with increased musical range and volume is disclosed. The technique used to produce some of the additional notes is called bending. To increase the musical range of the instrument, the harmonica has four reeds per reed cell. Two of the reeds are traditional blow and draw reeds and the other two reeds are enabler reeds for enabling the blow and draw reeds to both be bent to lower frequencies. All four reeds have check valves which are essential for the enabler reeds to preclude unwanted sympathetic vibration in adjacent cells. One embodiment permits a single valve to serve two reeds.

Abstract: A harmonica with increased musical range and volume is disclosed. The technique used to produce some of the additional notes is called bending. To increase the musical range of the instrument, the harmonica has four reeds per reed cell. Two of the reeds are traditional blow and draw reeds and the other two reeds are enabler reeds for enabling the blow and draw reeds to both be bent to lower frequencies. All four reeds have check valves which are essential for the enabler reeds to preclude unwanted sympathetic vibration in adjacent cells.