Improved device for improving receiver noise

Abstract

A device for improving receiver noise comprises an electromagnetic shielding casing, a vibrating diaphragm, a magnetic core coil, a magnetic induction coil signal wire and a circuit board, wherein the electromagnetic shielding casing comprises a front cavity and a rear cavity; a speaking terminal is arranged on the front cavity; the circuit board is arranged on one side of the rear cavity; two wiring holes are formed in the circuit board; an open pore is formed between the two wiring holes; and a damping net is arranged on the open pore. The device disclosed by the invention has the beneficial effect that a through hole corresponding to the open pore in the circuit board is formed in the electromagnetic shielding casing, so that low pitch of a receiver is enhanced; and the damping net is arranged on the open pore of the circuit board so as to reduce the air eddy current effect in the casing, improve the noise phenomenon of the receiver and reduce total harmonic distortion of the receiver.

Description

technical field [0001] The invention relates to the fields of electroacoustics and micromechanics, in particular to an improved device for improving howling of a receiver. Background technique [0002] At present, the shells for receivers on the market generally adopt docking type without air pressure balance and bass enhancement through holes. When using, the upper and lower boxes are docked and combined to surround the receiver components. The enhanced optimization process needs to add other parts to the shell to assist the completion, which not only increases the cost of raw materials, but also reduces the manufacturability of related products due to the addition of auxiliary parts assembly process, which is used for air pressure balance and bass The enhanced through hole often enhances the eddy current effect of the air in the casing, generates howling, increases the total harmonic distortion of the receiver, affects the quality of sound output, and has a relatively lar...

AI Technical Summary

Problems solved by technology

[0002] At present, the casings for receivers on the market generally adopt butt joint type without air pressure balance and bass enhancement through holes. Components are surrounded by it. At the same time, if it is necessary to optimize the air pressure balance and bass enhancement of the receiver, other components must be added to the shell to assist in the completion. This not only increases the cost of raw materials, but also reduces the cost of assembly due to the addition of auxiliary components. The manufacturability of related products is affected. The through holes used for air pressure balance and bass enhancement often enhance the air vortex effect in the housing, resulting in howling, increasing the total harmonic distortion of the receiver, and affecting the quality of sound output. The actual efficacy of the receiver has a large negative impact

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