Microphone Loudspeaker Module Shared Cavity Design
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Solution Overview
Problem
Existing wireless headsets face challenges due to the large space occupied by independently disposed microphones and loudspeakers, which affects the high-frequency response and overall sound quality.
Innovation Solution
A microphone-loudspeaker combined module is designed where the microphone and loudspeaker are disposed integrally, sharing a common cavity to optimize space utilization and improve sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the microphone and loudspeaker are independently disposed, then the components can be easily manufactured and assembled, but the space occupied is large and the front cavity is squeezed
Solution Approach 1:
The patent combines the microphone and loudspeaker into a single integrated module where the microphone is positioned at the center and the loudspeaker is positioned at the periphery, sharing a common front cavity. This merging reduces the total space occupied while maintaining ease of manufacture through modular assembly.
Solution Approach 2:
The microphone is nested within the loudspeaker structure, with the microphone located at the center and the loudspeaker surrounding it. This nested arrangement allows both components to share the same space efficiently, reducing the overall volume occupied while maintaining independent functionality.
2Reliability
If the microphone is disposed between the loudspeaker and ear canal, then noise cancellation function is achieved, but the front cavity cross-sectional area is reduced
Solution Approach 1:
The patent positions the microphone at the center and the loudspeaker at the periphery, creating distinct local zones for each component. This local quality differentiation allows the microphone to effectively capture noise for cancellation while the loudspeaker maintains an adequate front cavity cross-sectional area for high-frequency sound output.
3Volume of stationary object
If the front cavity cross-sectional area is reduced, then space is saved, but the high-frequency response is affected and sound quality deteriorates
Solution Approach 1:
The patent transitions from a linear arrangement to a radial/dimensional arrangement where the microphone is at the center and the loudspeaker is at the periphery. This dimensional change allows the front cavity to maintain a sufficient cross-sectional area for high-frequency response while still achieving space savings through the integrated module design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integrated design enhances space efficiency, maintains high-frequency sound quality, and improves the overall performance of the headset by reducing noise cancellation issues.
Implementation Method 1
a first membrane, disposed on the first side wall and the second side wall; and a second membrane, where one end thereof is disposed on the first side wall and another end is a free end
Data Source
Figure 1~2
Figure 3~4a
Figure 4b
AI summary
Embodiments of this application provide a microphone-loudspeaker combined module, a headset, and a terminal device. The microphone-loudspeaker combined module includes a microphone, a loudspeaker, and a PCB. The microphone has a microphone front cavity, the loudspeaker has a loudspeaker front cavity, and the microphone front cavity communicates with the loudspeaker front cavity. The microphone and the loudspeaker are disposed on the PCB, a signal processing unit is disposed on the PCB, and the microphone and the loudspeaker are electrically connected to a signal processing chip separately. In this application, the microphone and the loudspeaker are disposed on the PCB and the microphone front cavity communicates with the loudspeaker front cavity, so that the microphone and the loudspeaker can share the front cavity, thereby improving space utilization of the microphone and the loudspeaker, and resolving a problem that the loudspeaker and the microphone occupy large space.