Speaker Vent Path Guide Structure to Reduce Audio Feedback
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Solution Overview
Problem
Existing electronic devices with speakers experience discomfort and howling due to audio feedback when worn, as sound emitted through a vent hole is received by the device's microphone, leading to user discomfort and noise interference.
Innovation Solution
The device incorporates a guide part within the housing that extends along the side surface of the speaker, creating a separate audio path from the second surface to a vent hole, reducing the path length of secondary audio to the microphone and minimizing audio feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If audio is emitted through a vent hole in existing electronic devices, then audio output is provided to the user, but audio feedback occurs causing howling and user discomfort
Solution Approach 1:
The audio path is segmented into separate routes: a first audio path for primary audio output and a second audio path for vent hole audio. The guide part physically separates these paths, directing audio from the second surface of the speaker through the gap to the vent hole, preventing feedback to the microphone while maintaining audio output functionality
Solution Approach 2:
The guide part acts as an intermediary structure that mediates audio flow between the speaker and vent hole. It creates a controlled acoustic pathway through the gap, allowing audio to reach the vent hole without creating direct feedback loops to the microphone, thus resolving the howling issue while preserving audio output
2Object-generated harmful factors
If the speaker structure is modified to prevent audio feedback, then howling is reduced, but device complexity increases due to additional guide part structure
Solution Approach 1:
The guide part serves multiple functions simultaneously: it structurally supports the speaker assembly, creates the second audio path for vent hole output, and prevents audio feedback to the microphone. By combining these functions into a single component, the solution reduces overall device complexity while effectively addressing audio feedback issues
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
This structure decreases user discomfort by preventing sound from being emitted through the vent hole and received by the microphone, thereby reducing howling and improving audio quality.
Implementation Method 1
a second audio path extending from the gap to the vent hole such that audio from the second surface passing through the gap is emitted to the vent hole
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
An electronic device is provided. The electronic device comprises: at least one speaker comprising a first surface, a second surface opposite to the first surface, and a side surface connecting the first surface and the second surface; a housing which comprises a first audio path extending from the first surface toward the outside of the electronic device and a vent hole separated from the first audio path, and accommodates the at least one speaker; a guide portion which comprises a first portion in contact with the housing and a second portion spaced apart from the housing by a gap, and extends in the housing along at least a portion of the side surface; and a second audio path extending from the gap to the vent hole and positioned between the guide portion and the housing.