Abstract: A the harmonica includes a comb having a plurality of cell sets each including four subcells defined by cell walls and airflow partition walls, a plurality of mouthpiece openings disposed upstream or downstream of and registered with the corresponding cell sets in terms of flow of exhaled air or inhaled air, and a reed vibrating member having air passageways registered with the subcells, and a plurality of pairs of reeds registered with the subcells and are vibratile in the corresponding air passageways. When an air flow is evenly introduced into four subcells in one cell set through the corresponding mouth opening as a result of an inhaling or exhaling motion of the player to vibrate the four reeds in the corresponding cell set, four substantially the same notes of diatonic scales are produced.

Abstract: A harmonica includes a comb with a plurality of cell sets each including alternately arranged first and second cells, a plurality of mouthpieces registered with the cell sets, a reed vibrating member having a plurality of reeds registered with the cells and configured to be vibrated by an air flow for producing a tone of either one of diatonic and chromatic scales, and a valve member with a plurality of valve units interposed between the mouthpieces and the cell sets and shiftable between diatonic and chromatic positions to block the air flow into the second and first cells, respectively, thereby allowing the player to play the notes of both diatonic and chromatic scales.

Abstract: A harmonica includes a comb with a plurality of cell sets each including alternately arranged first and second cells, a plurality of mouthpieces registered with the cell sets, a reed vibrating member having a plurality of reeds registered with the cells and configured to be vibrated by an air flow for producing a tone of either one of diatonic and chromatic scales, and a valve member with a plurality of valve units interposed between the mouthpieces and the cell sets and shiftable between diatonic and chromatic positions to block the air flow into the second and first cells, respectively, thereby allowing the player to play the notes of both diatonic and chromatic scales.