Loudspeaker With Adjacent Wall Sound Ports
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Solution Overview
Problem
Conventional loudspeakers face challenges such as high noise and distortion at low frequencies, limited high-frequency output due to port-cavity resonance, and restricted stereo quality when held vertically.
Innovation Solution
The design features a loudspeaker with two acoustic channels forming sound output ports on adjacent walls of the electronic device's case, allowing for a larger port area and improved frequency response. The channels can be arranged in various configurations, including parallel sub-channels and horn-shaped structures, to enhance acoustic gain and reduce distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sound output port is limited to one side of the electronic device, then the device structure is simple, but the high-frequency output is limited due to port-cavity resonance
Solution Approach 1:
The single sound output port is segmented into multiple ports distributed across different surfaces of the electronic device. The patent implements this by providing first and second sound output ports on adjacent wall surfaces, and optionally third and fourth ports on opposite surfaces, thereby segmenting the acoustic output path to reduce port-cavity resonance limitations and improve high-frequency response.
Solution Approach 2:
The sound output ports are distributed across multiple spatial dimensions (different wall surfaces) rather than concentrated at a single location. This dimensional distribution allows the acoustic channels to extend in multiple directions from the speaker body, increasing the effective port area and reducing resonance constraints on high-frequency output.
2Reliability
If the port area is increased to improve high-frequency response, then the high-frequency output improves, but the device size increases
Solution Approach 1:
The total required port area is segmented across multiple distributed ports rather than requiring a single large port. Each port contributes to the overall acoustic output, allowing the cumulative effective area to be increased without proportionally increasing the device footprint.
Solution Approach 2:
The port area is distributed across multiple spatial dimensions (different surfaces and orientations), effectively increasing the total acoustic output area without increasing the planar footprint of the device. The acoustic channels extend in multiple directions from the speaker body.
3Reliability
If the driver is placed close to the device edge to increase port-cavity resonant frequency, then the high-frequency output improves, but the low-frequency performance deteriorates due to high flow velocity
Solution Approach 1:
The acoustic output is segmented across multiple distributed ports, allowing the speaker driver to be positioned more centrally within the device. This distribution reduces the flow velocity in any single port while maintaining total acoustic output, thereby reducing noise and distortion at low frequencies while preserving high-frequency performance.
Solution Approach 2:
The acoustic channels extend in multiple spatial dimensions from the speaker body, distributing the airflow across different directions and ports. This multi-dimensional distribution reduces the concentration of flow velocity in a single direction, reducing turbulence-related noise and distortion while maintaining acoustic output.
4Reliability
If multiple speakers are arranged at one end for stereo reproduction, then the stereo quality improves, but the distance between speakers becomes very small limiting performance
Solution Approach 1:
Multiple sound output ports are distributed across different wall surfaces and spatial dimensions rather than concentrated at a single end. This spatial distribution increases the effective distance between acoustic output points in three-dimensional space, improving stereo imaging and soundstage while maintaining compact device dimensions.
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 configuration significantly increases the high-frequency response, reduces flow-related distortion and noise at low frequencies, and provides greater freedom in achieving good acoustic gain and flat frequency response, even in portrait mode.
Implementation Method 1
a speaker body (10) configured for vibrating and producing sound
Implementation Method 2
a first acoustic channel (11) having a first end communicated with the speaker body (10) and a second end forming a first sound output port (13) on a case (20) of the electronic device
Data Source
AI summary
Provided is a loudspeaker applied to an electronic device, including: a speaker body configured for vibrating and producing sound; a first acoustic channel having a first end communicated with the speaker body and a second end forming a first sound output port on a case of the electronic device; and a second acoustic channel having a first end communicated with the speaker body and a second end forming a second sound output port on the case of the electronic device. The first and second sound output ports are located on adjacent wall surfaces of the case of the electronic device. Compared with the related art, larger port area can be achieved by separately forming sound output ports on adjacent walls of the housing, resulting in high frequency response and higher gain. The horn-shaped sound output port facilitates design and reduces flow-related distortion and noise at low frequencies.