Side-Edge Microphone Channel Layout for Stable Phone Audio Pickup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The stability of sound receiving effects in mobile phones is compromised due to the complexity of sound pickup channels in limited space, which complicates design and stability.
Innovation Solution
A noise-canceling microphone is positioned on the circuit board with a sound pickup hole located between the camera module and one side edge, allowing the sound pickup hole to extend curvilinearly through gaps between internal structures, and is secured with a clamping buckle and screw connection to enhance sealing and reduce internal space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sound pickup hole is positioned on the mainboard with complex internal components, then the sound receiving function can be implemented, but the design difficulty and instability increase due to the complex path required in limited space
Solution Approach 1:
The sound pickup hole is extracted from the complex mainboard area and repositioned to the side edge of the housing, removing it from the congested internal component region. This extraction simplifies the sound pickup path and eliminates the design complexity associated with routing through the mainboard's dense component layout.
Solution Approach 2:
The sound pickup hole is repositioned from a two-dimensional layout on the mainboard to a three-dimensional location on the side edge of the housing. This dimensional change allows the sound pickup path to bypass internal components by utilizing the external housing structure, thereby simplifying the overall design.
2Reliability
If additional components are added to the mainboard to improve sound effect reliability, then the sound quality improves, but the internal space utilization becomes more difficult and design stability decreases
Solution Approach 1:
The sound pickup function is extracted from the mainboard and relocated to the housing's side edge, eliminating the need for additional components and complex routing on the mainboard. This extraction preserves internal space and maintains clean layout of electronic components.
Solution Approach 2:
The side edge of the housing is utilized as a multi-functional element, serving both as a structural component and as the location for the sound pickup hole. This multi-functionality eliminates the need for dedicated space and additional components solely for sound pickup.
3Reliability
If the sound pickup hole is positioned away from the first side edge to avoid camera interference, then noise canceling during video recording is improved, but the distance constraint makes layout more challenging
Solution Approach 1:
The sound pickup hole is positioned asymmetrically on the side edge, specifically closer to the first side edge than to the second side edge. This asymmetric positioning optimizes the distance from the camera module to achieve noise canceling performance while maintaining a straightforward layout that does not add complexity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This application provides a portable electronic apparatus, including a main body, a camera module, a noise-canceling microphone, and a sound pickup hole, where the main body includes a first side edge, a second side edge, and an outer surface, the first side edge and the second side edge are located on two opposite sides of the outer surface, the camera module is mounted on the main body and is exposed on the outer surface, the main body includes a circuit board, and the noise-canceling microphone is mounted on the circuit board; the sound pickup hole includes a sound receiving end and a sound output end, the sound receiving end runs through the outer surface, the sound receiving end is located on one side position of the outer surface and is close to the first side edge, and the sound output end is disposed on the circuit board and communicates with a sound output hole of the noise-canceling microphone; and the sound pickup hole is located between the camera module and the first side edge in a width direction of the portable electronic apparatus.