Acoustic-Electric Transducer Array for Fast Low-Noise Sub-Band Signals
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Solution Overview
Problem
Existing signal processing methods for generating sub-band signals from audio signals are time-consuming and prone to noise due to complex digital signal processing and high sampling frequencies.
Innovation Solution
A device comprising multiple acoustic-electric transducers with different frequency responses generates sub-band signals by leveraging their inherent properties, reducing the need for digital signal processing and minimizing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital signal processing is used to generate sub-band signals, then sub-band signals can be generated, but processing time increases and noise is introduced
Solution Approach 1:
The audio signal is segmented into multiple frequency bands using multiple acoustic-electric transducers, each tuned to a specific frequency range. This physical segmentation allows simultaneous processing of different frequency components without requiring time-consuming digital filtering operations, thus reducing processing time while maintaining signal quality.
Solution Approach 2:
The patent replaces the mechanical/digital signal processing system with a physical acoustic filtering system. Instead of using digital algorithms to separate frequency bands, the invention uses acoustic-electric transducers with inherent frequency-selective properties to directly convert specific frequency ranges into electrical signals, eliminating processing delays and digital noise.
2Measurement precision
If digital signal processing is used to generate sub-band signals, then sub-band signals can be generated, but noise is introduced
Solution Approach 1:
The patent replaces the mechanical/digital signal processing system with a physical acoustic filtering system. Instead of using digital algorithms to separate frequency bands, the invention uses acoustic-electric transducers with inherent frequency-selective properties to directly convert specific frequency ranges into electrical signals, eliminating processing delays and digital noise.
Solution Approach 2:
The invention extracts only the necessary frequency components directly at the transducer level by selecting transducers with specific frequency responses. This extraction happens before signal processing, removing unwanted frequency components and reducing noise introduction that would occur during digital processing of the full-band signal.
3Productivity
If multiple acoustic-electric transducers with different frequency responses are used, then processing time is reduced, but device complexity increases
Solution Approach 1:
The patent employs multiple acoustic-electric transducers that each serve a specific frequency band function. While the number of transducers increases, each transducer is a standardized component with a defined frequency response characteristic. This modular approach allows the system to achieve fast parallel processing of multiple frequency bands while managing complexity through component standardization and functional specialization.
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 significantly reduces processing time and noise by utilizing parallel-connected transducers with varied frequency responses to generate sub-band signals efficiently.
Implementation Method 1
multiple acoustic-electric transducers with different frequency responses are arranged in parallel, to generate a plurality of sub-band signals
Data Source
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AI summary
A device for processing an audio signal (205) may include a first acoustic-electric transducer (211) and a second acoustic-electric transducer (212). The first acoustic-electric transducer (211) may have a first frequency response, and may be configured to detect the audio signal (205) and generate a first sub-band signal (2151) according to the detected audio signal (205). The second acoustic-electric transducer (212) may have a second frequency response, the second frequency response being different from the first frequency response. The second acoustic-electric transducer (212) may be configured to detect the audio signal (205) and generate a second sub-band signal (2152) according to the detected audio signal (205).