Audio Processing Device Microphone Spacing and Diameter Configuration
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Solution Overview
Problem
Existing audio processing technologies face challenges in generating audio signals with predetermined directivity and favorable characteristics, particularly in effectively managing directivity across different frequency bands.
Innovation Solution
The use of multiple microphones with varying spacings and configurations, combined with signal processing units that apply beamforming and filtering techniques, to generate audio signals with specific directivity patterns by selecting appropriate microphones for each frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single microphone configuration is used for all frequency bands, then the device complexity is reduced, but the audio signal quality and directivity characteristics deteriorate across different frequency bands
Solution Approach 1:
The patent divides the frequency spectrum into multiple bands (e.g., low frequency band and high frequency band) and assigns different microphone configurations to each band. Specifically, a first microphone with a first spacing between elements is used for one frequency band, while a second microphone with a second spacing is used for another frequency band. This segmentation allows optimization of directivity and signal quality for each frequency range independently, resolving the contradiction between signal quality and device complexity.
2Manufacturing precision
If microphones with wider spacing are used, then directivity is improved, but self-noise amplification increases
Solution Approach 1:
The patent applies local quality by using different microphone spacings for different frequency bands. For low frequency bands, wider microphone spacing is used to achieve better directivity, while for high frequency bands, narrower spacing is used to minimize self-noise amplification. This localized optimization ensures that each frequency band receives the appropriate microphone configuration, achieving good directivity where needed without introducing excessive noise elsewhere.
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 approach allows for the generation of high-quality audio signals with optimal directivity and reduced noise across a wide frequency range, balancing directivity and self-noise amplification.
Implementation Method 1
a different microphone is used for generation of directivity depending on a frequency band
Implementation Method 2
The use of multiple microphones with varying spacings and configurations, combined with signal processing units that apply beamforming and filtering techniques
Implementation Method 3
The use of multiple microphones with varying spacings and configurations, combined with signal processing units that apply beamforming and filtering techniques
Data Source
AI summary
To provide an audio processing device including a configuration in which a different microphone is used for generation of directivity depending on a frequency band.