Four-Speaker Handheld Audio System Spatial Sound Field
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Solution Overview
Problem
Conventional handheld electronic devices with two speakers are limited by their internal space, restricting the creation of a surround sound effect and sound field width, making it difficult to achieve enhanced listening experiences.
Innovation Solution
The device incorporates four speakers arranged along opposite sides of the housing, with a control unit and power amplifiers to drive the speakers, enhancing the low-frequency sound and balancing channels for improved overall sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two speakers are configured to generate stereo, then the device structure is simple, but the sound field width and surround sound effect are restricted
Solution Approach 1:
The audio system is segmented into four independent speakers arranged at different locations (top, bottom, left, right sides) of the housing, with each speaker handling specific audio channels. This segmentation allows the creation of a wider sound field and surround sound effects while maintaining manageable structural complexity through modular speaker placement and independent channel processing
Solution Approach 2:
The patent transitions from a traditional two-speaker stereo configuration to a four-speaker spatial arrangement that utilizes multiple dimensions of the housing structure. Speakers are positioned at top, bottom, left, and right sides, creating a three-dimensional sound field that expands the sound field width and enables surround sound effects beyond conventional stereo limitations
2Ease of manufacture
If four speakers are arranged along opposite sides of the housing, then the sound field width and surround sound effect are improved, but the internal space utilization becomes more complex
Solution Approach 1:
Each speaker is positioned at a specific location along the opposite sides of the housing, with dedicated audio channels assigned to each position. The housing structure is designed with localized speaker mounting areas that optimize sound projection directions, allowing each speaker to contribute uniquely to the overall surround sound effect while managing the complexity through specialized local configurations
Solution Approach 2:
The four speakers are arranged asymmetrically along the opposite sides of the housing rather than in a symmetric configuration. This asymmetric arrangement optimizes the sound field distribution and surround sound coverage by positioning speakers at strategically different locations, creating a more immersive audio experience while adapting to the specific internal space constraints of the housing
3Ease of manufacture
If the low frequency part of the first channel signal is strengthened, then the overall sound quality is improved, but the structural characteristics of the speaker in limited space are constrained
Solution Approach 1:
The patent applies signal processing to strengthen the low frequency part of the first channel signal, changing the audio parameter characteristics to enhance overall sound quality. This parameter modification compensates for the limitations of the speaker's structural characteristics in the constrained internal space, allowing improved sound quality without requiring larger or more complex speaker hardware
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 enhances the sound field width and overall sound quality by providing a more immersive audio experience with balanced channels and improved low-frequency sound, overcoming the limitations of the internal space.
Implementation Method 1
a first speaker 140, a second speaker 150, a third speaker 160, and a fourth speaker 170
Data Source
AI summary
A handheld electronic device is provided. The handheld electronic device includes a housing, a first speaker, a second speaker, a third speaker, and a fourth speaker. The housing includes a back plate, a first sidewall, and a second sidewall. The first sidewall and the second sidewall are disposed at opposite sides of the back plate. The first sidewall is parallel to the second sidewall, and a length of the first sidewall is greater than a distance between the first sidewall and the second sidewall. The first speaker and the second speaker are disposed in the housing and arranged along the first sidewall. The third speaker and the fourth speaker are disposed in the housing and arranged along the second sidewall.