Segmented Electroacoustic Transducer for Multi-Signal Processing
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Solution Overview
Problem
Existing capacitive sound transducers face limitations in flexibility and directional characteristics, requiring complex signal mixing and structural units for multiple signals, which can lead to distortion and increased weight, especially in applications like active noise compensation.
Innovation Solution
The electroacoustic transducer design features a diaphragm and counterelectrode with multiple electrically insulated segments, allowing for independent signal processing and reduced structural complexity, enabling flexible and versatile operation with improved sensitivity and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple signals are to be processed simultaneously, then signal processing capability is improved, but device complexity increases due to requirement for signal mixing and structural units
Solution Approach 1:
The counterelectrode is divided into multiple electrically insulated segments (first counterelectrode segment, second counterelectrode segment) that can be independently controlled. This segmentation allows different electric signals to be applied to different segments simultaneously, enabling multiple signal processing capabilities without requiring complex external signal mixing structures.
Solution Approach 2:
The single transducer structure with segmented counterelectrode serves multiple functions by allowing different signal combinations to be applied to different segments. The same physical structure can process multiple signals simultaneously for different purposes (e.g., useful signal and correction signal in active noise compensation) without requiring separate transducers or complex mixing units.
2Adaptability or versatility
If separate transducers are used for different signals, then signal processing flexibility is improved, but weight and material usage increase
Solution Approach 1:
Multiple signal processing capabilities are merged into a single transducer structure. Instead of using separate transducers for different signals, the invention combines multiple independently controllable counterelectrode segments into one integrated unit, reducing the total number of components and thereby reducing weight and material usage.
Solution Approach 2:
The single transducer structure serves multiple functions by allowing different electric signals to be applied to different segments simultaneously. This multi-functional design eliminates the need for multiple separate transducers, directly reducing weight while maintaining signal processing flexibility.
3Adaptability or versatility
If signal mixing is implemented before the transducer, then multiple signals can be processed, but distortion and processing delays occur
Solution Approach 1:
The counterelectrode is segmented into electrically insulated portions that can be independently controlled. This allows different electric signals to be applied directly to different segments without requiring mixing before the transducer. By eliminating the pre-mixing stage, the invention avoids the distortion and delays associated with signal mixing while still enabling multi-signal processing.
Solution Approach 2:
The signal mixing function is extracted from the external signal processing path and integrated into the transducer structure itself through the segmented counterelectrode. Each segment can receive different signals directly, eliminating the need for separate mixing units and the associated distortion and delay problems.
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 design enhances the transducer's sensitivity and flexibility, allowing for precise control of oscillation forms and directional effects without the need for pre-mixing signals, while reducing material and weight, and simplifying production processes.
Implementation Method 1
the diaphragm and the counterelectrode form an electric condenser whose capacitance is dependent on the diaphragm deflection caused by the sound
Implementation Method 2
If now an electric voltage is applied to the condenser of that structure the acoustic excitation of the diaphragm leads to a change in capacitance (due to a movement of the electrodes towards or away from each other), to a current between the electrically connected components diaphragm and counterelectrode
Implementation Method 3
With that configuration the diaphragm and the counterelectrode form an electric condenser
Data Source
AI summary
The electroacoustic transducer according to the invention has at least one diaphragm and at least one counterelectrode. In that case the diaphragm and/or the counterelectrode each have at least two electrically mutually insulated segments. In that arrangement the segments are so adapted that different electric signals are supplied or that different electric signals are delivered in response to exposure to sound of the sound transducer.