Audio Interface Switch Sensitivity Unification via Conversion Tables
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Solution Overview
Problem
In audio systems with multiple immediate output switches, varying pressure sensitivity among switches leads to inconsistent volume control and operation feel, making unified operation impossible.
Innovation Solution
An electronic device with operation switches having pressure-sensing elements and a controller that uses a conversion table to standardize output levels across switches, ensuring the same level value is produced for the same pressing force, even with differing sensitivities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple immediate output switches are provided for audio file reproduction, then operation versatility is improved, but pressing sensitivity uniformity deteriorates
Solution Approach 1:
The patent applies parameter changes by creating individual conversion tables for each immediate output switch based on their respective pressing sensitivity characteristics. The controller changes the output parameter (level value) according to the specific pressing force detected by each switch, using switch-specific conversion tables that map raw output values to standardized level values. This resolves the contradiction by allowing multiple switches (versatility) while compensating for sensitivity differences through parameter transformation (uniformity).
Solution Approach 2:
The patent implements feedback by detecting the output value from each pressure-sensing element, comparing it against the stored conversion table for that specific switch, and adjusting the level value accordingly. The controller continuously monitors the pressing force on each switch and uses the pre-established conversion tables to normalize the response, ensuring that switches with different sensitivities produce consistent operational results. This feedback mechanism enables unified operation across multiple switches.
2Ease of operation
If pressure sensitivity is standardized across switches, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing conversion tables for each immediate output switch during the device setup or initialization phase. These conversion tables are stored in the controller's memory and contain the mapping relationships between raw output values and standardized level values for each specific switch. By performing this calibration work in advance, the system achieves unified operation without requiring complex real-time adjustments during actual use, thus improving ease of operation while managing device complexity through upfront preparation.
3Measurement precision
If conversion tables are created for each switch, then pressing sensitivity uniformity is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies self-service by enabling the system to automatically generate and store conversion tables for each immediate output switch without requiring manual calibration or external intervention during manufacturing. The controller detects the pressing sensitivity characteristics of each switch and autonomously creates the appropriate conversion tables, storing them in memory. This self-calibration capability significantly reduces manufacturing complexity while achieving pressing sensitivity uniformity across all switches.
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 allows users to operate all switches with a uniform feel and consistent volume control, regardless of individual switch sensitivity variations, by creating a conversion table based on predetermined pressing forces and output values.
Implementation Method 1
an operation switch having a pressure-sensing element
Data Source
AI summary
An electronic device is provided that uniformalizes (makes uniform) pressing sensitivities of operation switches such as a plurality of immediate output switches. A system includes a PC which is connected to a communication line, and an audio interface device which is connected to the PC and which has an immediate output switch which outputs to the PC a reproduction start command signal of an audio file which is assigned in advance, according to a user operation. A processor of the audio interface device converts an output value of the immediate output switch using a conversion table to a level value among a plurality of levels, and outputs the converted value. The conversion table is a table which converts different output values of the immediate output switch for the same pressing force into the same level value.