Harmonica, a multi-reed instrument that uses the mouth to blow or inhale to make the metal reeds vibrate and produce sound; it is a free-reed wind instrument in the classification of musical instruments. Since the sound source is a reed with a length between 1.5-3.5 cm rather than an air column (such as a flute), the volume of the solo harmonica is usually within 20×6×4 cm (length; width; height). Its range depends on the type and key.Silikonsexpuppen There are slight differences depending on the gender. It can be roughly summarized from 1 octave below middle C to 3 octaves above middle C, covering about 3 to 4 octaves. The multi-reed structure gives the harmonica the foundation for playing harmony. For ordinary adults, as long as the reeds are arranged in the same direction (either by blowing or inhaling) and the grid spacing is within 6 centimeters, they can all sound at the same time; because the reeds on the same harmonica cannot be adjusted during the performance, Relative to the position, the ability of a single harmonica to play chorus is limited.Mollige Sexpuppen Generally speaking, harmonicas mass-produced by musical instrument companies are less restricted only in terms of octave harmonies. There are different opinions on its origin. It is said that the sheng was introduced to Europe in the 18th century, providing musical instrument designers with the theoretical basis for free-reed wind instruments. The earliest known prototype of the harmonica was made by Friedrich Buschmann in Berlin in 1821.Schlanke Sexpuppen The basic structure of the harmonica is the reed, seat plate, fret and cover. The reed is fixed on the seat plate. Generally, harmonicas produced by harmonica factories use rivets or spot welding to fix the reed. For the convenience of maintenance, some people process the seat plate and modify it to use screws to fix the reed. In addition to the reeds, seat plate, fret and cover, the chromatic harmonica also has a mouthpiece, spring and key slider.Anime sexpuppen There is a plastic sheet stuck to the seat plate, which can effectively reduce the air circulation in the gap between the non-sounding reeds during performance and increase the air density. The common ten-hole harmonica does not have film attached, but in order to meet the performance requirements of single-reed compression, there are also designs where film is only attached to the treble reed in the same air chamber (fret position). This design of sticking film on the ten-hole harmonica is called half-valving, and was invented by New Zealand harmonica player and modifier Brendan Bower.große brüste sexpuppen Solo harmonica On a harmonica, a harmonica whose reeds have a diatonic pitch is called a diatonic harmonica. Ten-hole harmonicas and polyphonic harmonicas generally produced by harmonica factories are classified as diatonic harmonicas. In the middle range, the reeds form a complete diatonic scale; however, due to structural limitations and harmonic considerations during performance, Some reeds may be added or removed for the high and low registers. Generally, diatonic harmonicas produced by harmonica factories have different tones (such as 12 major, 12 minor and natural minor) to choose from to meet the needs of players. In European and American countries, diatonic harmonica mostly refers to the ten-hole harmonica. Polyphonic Harmonica (Tremolo) polyphonic harmonica The polyphonic piano holes are divided into two rows, upper and lower. Generally, when playing, the upper and lower reeds in the same hole sound at the same time. Due to the subtle difference in the vibration frequency of the two reeds, simultaneous vibration will produce a phenomenon physically called "beat", which is manifested as periodic changes in the intensity of the sound, which is the so-called "tremolo". It is called "Tremolo" abroad. The advantage of the polyphonic harmonica is that its structure is simple and fixed, and it does not require complicated skills. The polyphonic harmonica has a complete range of types and tonality. The tone is crisp and loud, the volume is large, and it has strong penetrating power. It is suitable for some ethnic and other styles. It can also be said that it is the type of harmonica with the most abundant and gorgeous techniques; it is mostly classified as a first-key instrument, and the second and third harmonicas are often used at the same time or alternately when doing semitone ups and downs and key changes.

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