Audio Receiver Support Volume with Controlled Air Channels
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Solution Overview
Problem
Conventional audio receiver component designs in mobile computing devices face challenges in balancing structural considerations with the need for quality audio output, particularly at low frequencies, leading to issues such as limited bandwidth, echo susceptibility, and parasitic resonance due to sealed or leaky rear volumes and multiple port structures.
Innovation Solution
A computing device structure that positions the audio receiver component on the front side of a platform within the housing, creating a partitioned support volume with controlled air channels for efficient sound emission, reducing device thickness and minimizing echo, while maintaining effective frequency response without aggressive digital signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a sealed rear volume is used for the audio receiver component, then structural simplicity is improved, but audio bandwidth at low frequencies deteriorates
Solution Approach 1:
The sealed rear volume is segmented into multiple chambers by partition walls, with each chamber serving a specific acoustic function. This segmentation allows the system to maintain structural simplicity while achieving complex acoustic performance including low-frequency bandwidth enhancement through controlled acoustic paths between chambers
Solution Approach 2:
Acoustic ports and partition walls act as intermediaries between different volume chambers, controlling the flow of sound waves. These intermediary structures enable low-frequency sound transmission while maintaining the overall sealed architecture, resolving the contradiction between structural simplicity and audio bandwidth
2Reliability
If an uncontrolled leak is introduced into the rear volume, then low frequency bandwidth is improved, but echo susceptibility worsens
Solution Approach 1:
The harmful uncontrolled leak is extracted and replaced with a controlled acoustic port system. The acoustic ports are specifically designed to provide the necessary low-frequency bandwidth while preventing the creation of internal echo paths between the receiver and microphone, thus eliminating the harmful effect while preserving the beneficial one
Solution Approach 2:
Different regions of the rear volume structure are given different acoustic properties through selective placement of acoustic ports and partition walls. This local differentiation allows controlled sound transmission in specific directions while blocking echo paths in other directions, resolving the contradiction between bandwidth and echo susceptibility
3Reliability
If multiple port structures are added to the rear volume, then resonant effects at specific frequencies are achieved, but device complexity increases
Solution Approach 1:
Multiple acoustic ports are merged into a unified partition wall structure that serves both structural and acoustic functions. This integration achieves the desired resonant effects at specific frequencies while minimizing the increase in device complexity by combining multiple functions into a single structural element
Solution Approach 2:
The partition walls containing acoustic ports serve multiple functions: they separate volume chambers, control acoustic flow, create resonant effects, and maintain structural integrity. This multi-functionality achieves complex frequency response characteristics without proportionally increasing device complexity
4Ease of manufacture
If the audio receiver component is positioned with a sealed rear volume, then manufacturing simplicity is improved, but audio output efficiency at low frequencies deteriorates
Solution Approach 1:
Acoustic ports and partition structures are pre-integrated into the housing design phase, allowing the sealed rear volume to be manufactured as a unified structure. This preliminary integration maintains manufacturing simplicity while the pre-configured acoustic paths ensure efficient low-frequency sound output
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 solution enhances audio quality at low bandwidths by allowing controlled air leakage, reducing echo, and optimizing the audio receiver's performance across necessary frequencies, thus improving overall audio output efficiency and reducing the need for costly digital signal processing.
Implementation Method 1
The use of one or more air channels, in connection with the support volume, to enable a controlled leak from the support volume when the audio receiver component is in operation. The use of the controlled leak improves audio quality, particularly at low bandwidths.
Data Source
AI summary
A computing device comprises a platform and an audio receiver component. The audio receiver component is provided on a front side of the platform and is oriented to emit sound out of the front of the housing. A gap volume adjacent to the audio receiver is defined by the front side of the platform and the front façade of the housing. The gap volume supports audio output from the audio receiver component. A first air channel is defined by a combination of (i) a through-hole in the platform at the gap volume, and (ii) an opening in a back façade of the housing.