Capacitive Touch Sensor for Electronic Wind Instrument Lip Detection
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Solution Overview
Problem
Electronic wind instruments face poor response time due to pressure-sensitive sensors, making it difficult to achieve musical performances comparable to acoustic wind instruments.
Innovation Solution
An electronic musical instrument equipped with a capacitive touch sensor that detects lip and tongue contact information, allowing for precise control of musical notes through a controller that adjusts tone, volume, and pitch based on lip contact area and position, and tongue contact state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure-sensitive sensors are used to detect lip and tongue positioning, then the electronic wind instrument can control musical notes, but the response time is poor and musical performance is unsatisfactory
Solution Approach 1:
The patent replaces pressure-sensitive sensors with capacitive touch sensors to detect lip and tongue positioning. This substitution eliminates the mechanical response limitations of pressure sensors while maintaining detection precision, thereby resolving the contradiction between measurement precision and response speed.
2Loss of information
If pressure-sensitive sensors are arranged in a matrix on the reed, then lip and tongue positioning can be detected, but the response time deteriorates
Solution Approach 1:
The patent replaces the matrix of pressure-sensitive sensors with capacitive touch sensors that detect lip and tongue positioning through electrical field changes rather than mechanical pressure. This substitution maintains comprehensive positioning information detection while dramatically improving response time by eliminating mechanical sensor limitations.
3Adaptability or versatility
If conventional pressure-sensitive sensors are used, then musical note control is possible, but satisfactory musical performance comparable to acoustic wind instruments cannot be achieved
Solution Approach 1:
The patent replaces pressure-sensitive sensors with capacitive touch sensors to achieve responsive detection of subtle lip and tongue movements. This enables the electronic wind instrument to accurately reproduce the nuanced musical expressions of acoustic instruments, thereby improving both adaptability and reliability of musical performance.
Solution Approach 2:
The patent changes the detection parameter from mechanical pressure to electrical capacitance. This parameter change allows for detection of extremely subtle lip and tongue movements with high temporal resolution, enabling the instrument to capture and reproduce the subtle variations in musical expression that characterize acoustic wind instrument performance.
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
Enhances responsiveness and musical expression by accurately detecting subtle changes in lip and tongue contact, enabling performance techniques like pitch bending and vibrato, thus producing satisfactory musical notes.
Implementation Method 1
a contact sensor having a capacitive touch sensor
Data Source
AI summary
An electronic musical instrument includes: a contact sensor that generates lip detection information from an operation by a performer; and a controller that derives a lip contact area from the lip detection information generated by the contact sensor, and performs musical note control of an electronic sound source in accordance with the derived lip contact area.