Telephone receiver, feedback type telephone receiver noise elimination system and active noise elimination method for telephone receiver

Abstract

The invention provides a telephone receiver. The telephone receiver comprises a double-voice coil loudspeaker, an upper cover plate and a microphone, wherein the double-voice coil loudspeaker comprises a vibrating diaphragm, a first voice coil, a second voice coil and a magnetic driving device, the first voice coil is combined with the vibrating diaphragm and is used for receiving a first signal to generate first magnetic force, the second voice coil is combined with the vibrating diaphragm and used for receiving a second signal to generate second magnetic force, and the magnetic driving device provides a fixed magnetic field to interact with the first magnetic force and the second magnetic force, so that the first voice coil and the second voice coil drive the vibrating diaphragm to vibrate, the upper portion of the double-voice coil loudspeaker is covered with the upper cover plate, a hole is formed in the middle of the upper cover, the microphone is arranged on the edge of the hole of the upper cover plate, and the central axis of the microphone is perpendicular to the axis of the hole. The invention further provides a noise elimination system and a noise elimination method with the telephone receiver. The telephone receiver, the noise elimination system and the noise elimination method have a better noise elimination effect.

Description

technical field [0001] The invention relates to the field of receivers, in particular to a dual voice coil receiver, a receiver noise elimination system and a receiver noise elimination method. Background technique [0002] In an environment with high background noise, whether it is for personal protection or voice communication, it is necessary to wear sound-proof earmuffs. The passive noise cancellation determined by the material combined with the electronically controlled active noise cancellation active earphone can achieve the ideal noise isolation effect. In addition to active noise cancellation, active noise canceling earphones also need to ensure the function of the receiver, especially in high-reliability occasions such as military and police applications. In special cases such as ANC abnormalities, it is necessary to switch to a passive working state to ensure the receiver function normal. [0003] Traditional active noise cancellation systems generally consist of...

AI Technical Summary

Problems solved by technology

In order to obtain a better noise cancellation effect, some use double voice coil speakers, but limited to the fact that the layout of the microphone has not changed, there are still deficiencies in noise cancellation.

In addition, when performing active noise cancellation, signal attenuation is not considered

Moreover, no matter in the active or passive state, the impedance design of a single voice coil receiver is difficult to balance. Basically, it is necessary to prioritize the impedance matching external signal in the active noise cancellation design. Most of the receivers used by domestic military and police are high impedance. characteristics, the existing headphone designs are mainly low-voltage designs (the high voltage on the head threatens personal safety), which will bring difficulties to the design and difficulty in device selection.

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