CN-122002168-A - A module structure for listening

CN122002168ACN 122002168 ACN122002168 ACN 122002168ACN-122002168-A

Abstract

The invention relates to a module structure for listening, which comprises a left sound box, a right sound box and an electronic plug box arranged between the left sound box and the right sound box, wherein the electronic plug box forms a closed electromagnetic shielding shell, a listening circuit for receiving and converting network digital audio signals, a power amplification circuit for amplifying audio power and a power supply circuit for providing electric energy are arranged in the electronic plug box, and a left sound channel loudspeaker and a first earphone interface circuit which are connected with the output end of the power amplification circuit are arranged in the left sound box. The invention can receive network audio data and control commands from the console, convert the network audio data into analog signals according to the data format and the data sampling rate agreed by the interface protocol, realize the listening function, and simultaneously realize the physical space isolation between the electronic plug-in box and other components, thereby greatly improving the shielding performance and the reliability of the module.

Inventors

DONG YANTAO
Rui Gongbing
LIU FENG
WANG JING
CHEN LONG

Assignees

中国船舶集团有限公司第七一五研究所

Dates

Publication Date: 20260508
Application Date: 20260202

Claims (10)

1. The module structure for listening is characterized by comprising a left sound box, a right sound box and an electronic plug box arranged between the left sound box and the right sound box, wherein: The electronic plug box forms a closed electromagnetic shielding shell, and a listening circuit for receiving and converting network digital audio signals, a power amplification circuit for amplifying audio power and a power supply circuit for providing electric energy are arranged in the electronic plug box; a left sound channel loudspeaker and a first earphone interface circuit which are connected with the output end of the power amplifier circuit are arranged in the left sound box; A power control circuit, a right channel loudspeaker and a second earphone interface circuit which are connected with the power circuit are arranged in the right sound box; The module structure is provided with a power input interface for accessing an external power supply, a network interface for connecting a console to receive network audio data, and an earphone interface for outputting analog audio signals; the listening circuit is configured to receive network digital audio data through the network interface and convert the network digital audio data into analog audio signals, and to drive the speaker after amplification by the power amplifier circuit or to output the audio signals through the earphone interface.
2. The module structure for listening according to claim 1, wherein the listening circuit, the power amplifier circuit and the power supply circuit are respectively implemented by independent circuit boards, and the interior of the electronic jack box is divided into a plurality of independent shielding compartments by partition boards, which are respectively used for accommodating and physically isolating the circuit boards corresponding to the listening circuit, the left channel power amplifier circuit, the right channel power amplifier circuit and the power supply circuit.
3. The modular structure for listening to claim 2 further comprising a printed motherboard disposed within said electronics compartment and behind each of said shielded compartments for mounting and electrically connecting each of said circuit boards, said printed motherboard being copper clad and electrically connected to a separator of said electronics compartment by a conductive connector such that each of said shielded compartments forms an independent shielded cavity.
4. A module structure for listening to sound as set forth in claim 3 wherein a metallic back cover plate is also mounted behind the printed motherboard, the metallic back cover plate and the housing of the electronic jack and the printed motherboard together forming a multiple electromagnetic shielding structure.
5. The modular structure for listening as set forth in claim 2 wherein the circuit board is fixedly connected to the shielded compartment walls of the electronic enclosure by locking bars.
6. The module structure for hearing according to claim 5, wherein the housing of the electronic jack is a continuous sealing structure, and heat generated by each circuit board during operation is conducted to the housing of the electronic jack through the locking strip and dissipated by driving air flow through an air duct outside the housing by a fan assembly provided on the module.
7. The modular structure for listening to sound of claim 1 wherein the electrical connection between the left and right speakers is via an external channel isolated from the electronic enclosure internal circuit cavity.
8. The modular structure for listening as set forth in claim 1 wherein the power input interface and power control board are mounted at the bottom of the right speaker box and the network interface is mounted at the bottom of the left speaker box.
9. The structure of claim 1, wherein the overall size of the module is not greater than 642mm by 300mm by 154mm, the weight is not greater than 20kg, the rated operating voltage is 220V, and the power consumption is not greater than 120W.
10. The module structure for listening as set forth in claim 1, wherein the listening circuit is configured to receive network digital audio data of not less than 16 channels in real time, select 1 or 2 channels thereof in real time for conversion output according to a control command, and support cloning, superimposition and switching of output modes of left and right channels.

Description

A module structure for listening Technical Field The invention belongs to the technical field of audio playing and electromagnetic compatibility, and particularly relates to a module structure for listening. Background In the traditional fields of acoustic detection, broadcast listening and professional audio processing, the input signals of listening devices are mostly locally generated analog audio signals. However, with the rapid development of digital and networked technologies, the collection, transmission and distribution of audio data are increasingly taking digital form and being performed over networks. In particular, in complex systems such as ship sonar and command control, multiple paths of audio data are collected to a console via a network, so that a dedicated listening terminal device is required, which can remotely receive the network digital audio streams and reliably restore the network digital audio streams to analog signals for operators to directly listen to. The existing network audio receiving device or universal audio interface module is not specially designed for the high electromagnetic interference environment in structure. The internal circuit board layout is typically open and lacks effective spatial isolation and shielding. When the module needs to integrate the high-sensitivity audio decoding circuit, the high-power amplification circuit and the switch power supply, the high-frequency noise, the power supply ripple wave and the power amplification electromagnetic radiation emitter generated by the digital circuit are easy to cross talk in the module, so that the finally output analog audio signal is distorted, the bottom noise is increased, and the definition and the fidelity of the listening sound are seriously influenced. In addition, such devices also face the challenges of heat dissipation design to shield integrity, and common open hole heat dissipation approaches can disrupt shield continuity. Therefore, a dedicated listening module structure with compact structure, high shielding efficiency, reasonable heat dissipation and suitability for severe electromagnetic environment is needed to solve the technical problem of reliable conversion from network digital audio to high-quality analog listening signals. Disclosure of Invention The invention aims to solve the technical problems of providing a module structure for listening, which realizes extremely high electromagnetic shielding effectiveness in extremely limited space through innovative mechanical and electrical structural design, ensures coexistence of an internal high-sensitivity audio circuit and a high-power circuit without mutual interference, thereby outputting low-distortion and high-fidelity analog audio signals, simultaneously solves the heat dissipation problem of the module on the premise of ensuring shielding integrity, and realizes modularized design so as to be convenient for production, installation and maintenance. The technical scheme of the invention is that a module structure for listening is provided, and a three-section type integrated layout of a left sound box, an electronic plug box and a right sound box is adopted. The acoustic replay, core circuit processing, and power management partitions are integrated. The electronic plug box is a totally-enclosed metal shell serving as a core and forms a basic electromagnetic shielding layer. Three core circuit units necessary for realizing the listening function, namely a listening circuit for receiving and converting network digital audio signals, a power amplification circuit for amplifying audio power and a power supply circuit for providing electric energy are integrated in the audio-frequency power amplifier. The left sound box and the right sound box are symmetrically distributed, and a loudspeaker and an earphone interface circuit are arranged in the left sound box and the right sound box. The right sound box is also integrated with a power supply control circuit. External interface partition arrangement: the power interface is located at the right sound box, and the network interface is located at the left sound box. In order to achieve excellent electromagnetic compatibility, the technical scheme of the invention revolutionarily designs the electronic plug-in box, wherein the hearing circuit, the power amplifier circuit and the power supply circuit are not arranged in a mixed mode, but are realized by independent special circuit boards. The interior of the electronic plug box is divided into a plurality of independent shielding compartments by metal partition boards, and each core circuit board is respectively accommodated and physically isolated in one independent compartment, so that the main path of interference coupling is spatially stopped. The module is provided with a power input interface for accessing an external power supply, a network interface for connecting a console to receive network audio data and an earphone interface for outputt