Loudspeaker and earphone with loudspeaker

Abstract

The invention relates to a loudspeaker and an earphone with the loudspeaker. The loudspeaker comprises a diaphragm, a first polar plate and a second polar plate, wherein the first polar plate and the second polar plate are located on two sides of the diaphragm and are of mirror symmetry along the diaphragm, electrode layers are formed on the inner surfaces, facing the diaphragm, of the both, the electrode layer of the first polar plate is composed of at least two sub electrodes isolated from each other, and the sub electrodes comprise a first sub electrode connected with a conducting wire and are connected in series via resistors from the first sub electrode; and the aperture ratios of the areas of the sub electrodes on the first polar plate are sequentially reduced from big to small from the first sub electrode in the series direction. The loudspeaker has the advantages: the effect of a point acoustic source is simulated on the premise that loud and loose sound is guaranteed, so that the positioning is more accurate, meanwhile, the capacitance of the loudspeaker is also reduced, the load of an amplifier is reduced, and the loudspeaker is driven more easily. Meanwhile, compared with a conventional electrostatic loudspeaker, the loudspeaker is low in punching rate, improves the strength and uniformity of an electrostatic field and has low sound transmission loss.

Description

technical field [0001] The invention relates to the technical field of loudspeakers. Background technique [0002] At present, electro-acoustic speakers can be roughly classified into dynamic speakers, piezoelectric speakers and electrostatic speakers according to their driving methods. [0003] Electrostatic speakers are mainly used in high-end earphones and speakers. The working principle of traditional electrostatic speakers is to hold two fixed plates with openings to form a capacitor with a conductive diaphragm. By supplying the diaphragm with DC bias and giving two The AC voltage of the electrode audio uses the electrostatic force generated by the positive and negative electric fields to drive the diaphragm to vibrate and radiate the sound. [0004] Compared with the common dynamic speakers, the diaphragm of the electrostatic speaker is extremely thin and light, which can almost ignore the inertial motion of the diaphragm, so it has better transient response and stron...

AI Technical Summary

Problems solved by technology

In short, increasing the plate opening ratio will reduce the acoustic resistance while reducing the electrostatic field strength and deteriorating uniformity; otherwise, the sound permeability will deteriorate, and the two cannot be balanced

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