Denoising Microphone Sensor Module Interference
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Solution Overview
Problem
The integration of microphones and sensors in a single module for smart hardware leads to interference issues due to the sensor's operational disturbances, which existing solutions attempt to mitigate by separating components, resulting in increased module size.
Innovation Solution
A method and apparatus that detect the sensor's operation state and subtract pre-obtained interference noise signals from the microphone's voice signal to remove interference, ensuring effective noise reduction while maintaining a compact module size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sensor and microphone are packaged in the same module, then the module size is reduced and portability is improved, but the sensor operation causes interference noise that vibrates the microphone's sensitive film and degrades signal quality
Solution Approach 1:
The patent applies preliminary action by pre-obtaining and storing interference noise signals generated by sensor operations before actual voice recording. When the sensor operates, the system retrieves the pre-stored interference pattern and subtracts it from the microphone signal, enabling effective noise removal without requiring separate physical isolation of components.
Solution Approach 2:
The patent converts the harmful interference noise into a useful element by capturing, storing, and utilizing the exact noise pattern generated by sensor operation. Instead of treating the noise as purely detrimental, the system uses it as a reference signal for subtraction, transforming the harmful factor into a tool for achieving clean voice signals in a compact integrated design.
2Object-affected harmful factors
If the microphone is separately disposed in a different cavity from the sensor, then interference noise is eliminated, but the number of cavities increases and module volume becomes large
Solution Approach 1:
The patent applies merging by integrating both the sensor and microphone into the same module and even the same cavity space, eliminating the need for separate cavities. The physical proximity is accepted, and the interference issue is resolved through signal processing (noise subtraction) rather than physical separation, achieving both compact size and noise elimination.
Solution Approach 2:
The patent replaces the mechanical approach of physical separation (different cavities) with a signal processing approach. Instead of using mechanical isolation structures that会增加 volume, the system uses electronic signal subtraction to eliminate interference, substituting a mechanical solution with an electronic/software-based solution.
Data Source
AI summary
Disclosed are a method and an apparatus of denoising, and the method includes: receiving a first voice signal picked up by a microphone; if it is detected, with the first voice signal, that a sensor is in an operation state, subtracting an interference noise signal from the first voice signal to obtain a first voice signal with the interference removed therefrom, where the interference noise signal is an interference noise signal generated with regard to the microphone during an operation of the sensor, and the sensor and the microphone are packaged in one module; and outputting the first voice signal with the interference removed therefrom. By implementing the solution provided in the present disclosure, interference in a signal collected by a microphone when the microphone and a sensor in a module operate together is reduced and the small size of the module, packaged with the microphone and sensor, is guaranteed.