Phase inversion type huqin tone tuning device

Abstract

The invention relates to a phase inversion type huqin tone tuning device, which belongs to the field of musical instruments. The phase inversion type huqin tone tuning device comprises a huqin tube 2, a huqin holder 3, a vibration film 1 and the like. The phase inversion type huqin tone tuning device is characterized in that a reflection plate 4, a side plate 5, a hinge seat 6, a screw 7 and the like are arranged behind the huqin tube; the reflection plate is fixed on the screw; the screw is arranged into the axle hole of the hinge seat; the hinge seat is fixed on the huqin holder; an included angle between the reflection plate and the rear mouth of the huqin tube can be changed between 0 degree and180 degrees through rotating the screw to rotate, so that the phase of low-frequency phase inversion sound wave radiated by the back of the vibration film is shifted for 180 degrees to be equal to the phase of the wave sound radiated by the front side, the same-phase superposition amplitude of the two sound waves is enlarged at a sound hearing point, the volume and the tone are adjustable, and the due sound effect of the huqin can be fully performed. The phase inversion type huqin tone tuning device has a simple structure, is convenient to produce, is easy to assemble and disassemble, and can be mounted on both a new huqin and an old huqin.

Description

1. Technical field [0001] The invention relates to a phase-inverted huqin tuning device, which belongs to the field of musical instruments. 2. Background technology [0002] Most of the resonance boxes (qin tubes) of Chinese huqin are closed at the front end (covered with a diaphragm) and open at the rear end, as shown in Figure (1). [0003] When playing the piano, the diaphragm not only radiates sound waves from the front, but also radiates sound waves from the back, and the two phases are opposite. At low frequencies, the sound waves on the back will diffract to the front, because the sound path difference L of the front and rear sound waves is much smaller than the wavelength, at this time The phase difference introduced by the sound path difference is approximately zero. At the listening point A, the two columns of sound waves cancel each other out, and the sound output is very small, which is the so-called sound short circuit effect. This self-interference of sound ...

AI Technical Summary

Problems solved by technology

This self-interference of sound waves will cause inhomogeneity in the sound field and inhomogeneity in frequency characteristics, which will affect the sound effect of musical instruments.

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