Mobile Audio Output Band Splitting With Balanced Armature
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Solution Overview
Problem
Mobile apparatuses with small audio output means have limited reproduction frequency bands, restricting the range of audio frequencies that can be output, particularly for telephone calls, despite advancements in communication technology that widen the reproduction frequency band.
Innovation Solution
Incorporating a balanced armature and an audio signal processor that adjusts and combines different reproduction frequency bands using filters, allowing the mobile apparatus to output audio signals across a wider range than individual bands, effectively enhancing audio output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a small audio output means is attached to the mobile apparatus to increase portability, then portability is improved, but the reproduction frequency band is limited
Solution Approach 1:
The patent divides the audio output system into two separate audio output means: a first audio output means (small speaker) and a second audio output means (balanced armature). Each component is optimized for specific frequency ranges, with the first handling lower frequencies and the second handling higher frequencies. This segmentation allows the system to achieve a wide reproduction frequency band while maintaining compact size and portability.
2Device complexity
If a single audio output means is used, then device complexity is reduced, but the reproduction frequency band is limited
Solution Approach 1:
The patent implements dynamic frequency band adjustment where the audio signal processor dynamically assigns different frequency bands to different audio output means based on the reproduction requirements. The system can adaptively switch between using only the first audio output means, only the second audio output means, or both simultaneously, optimizing the reproduction frequency band while managing device complexity.
Solution Approach 2:
The audio signal processor serves multiple functions: it processes audio signals for both audio output means, dynamically adjusts frequency bands, and can operate in different modes (single output or dual output). This multi-functionality allows the system to achieve wide frequency band reproduction without proportionally increasing overall device complexity.
3Adaptability or versatility
If frequency bands are adjusted and combined using filters, then reproduction frequency band is widened, but device complexity increases
Solution Approach 1:
The audio signal processor dynamically changes frequency band parameters by adjusting filter characteristics. It can modify the frequency ranges assigned to each audio output means based on reproduction requirements, enabling wide frequency band coverage while managing processing complexity through parameter optimization rather than hardware complexity.
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 solution enables mobile apparatuses to reproduce audio signals across a broader frequency range, improving audio output quality and compatibility with both narrow and wide band voice call services, thereby enhancing user experience.
Implementation Method 1
a balanced armature capable of outputting an audio signal of a second reproduction frequency band of the received audio data signal
Implementation Method 2
an audio signal processor that adjusts and combines different reproduction frequency bands using filters
Data Source
AI summary
A mobile apparatus and control method thereof are provided, which includes an audio data signal input unit arranged to receive an audio data signal. An audio output unit is arranged to output an audio signal according to the received audio data signal within a first reproduction frequency. A balanced armature is arranged to output an audio signal according to the received audio data signal within a second reproduction frequency band. The second reproduction frequency band is different from the first reproduction frequency band. An audio signal processor is arranged to adjust the first reproduction frequency band and the second reproduction frequency band such that a combination of the first reproduction frequency band and the second reproduction frequency band is wider than the first reproduction frequency band and the second reproduction frequency band individually.