Acceleration Sensor Sound Output Control for Guitar Simulation
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Solution Overview
Problem
Existing simulative playing technologies, such as those using shock sensors and mercury switches, are limited in reproducing non-percussion instruments like guitar playing, lack practicality due to high costs and safety concerns, and struggle to accurately detect wristy operations.
Innovation Solution
A sound output control program and apparatus utilizing an acceleration sensor to detect changes in accelerations along two orthogonal axes, allowing for the generation and output of sounds based on the sum of these accelerations, enabling simulative stroke performances like guitar playing by determining changes in acceleration thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If shock sensor is used to detect impact for percussion instruments, then percussion sound detection is achieved, but non-percussion instruments like guitar cannot be simulated
Solution Approach 1:
The patent replaces the mechanical impact detection system (shock sensor) with an acceleration sensor that measures acceleration in multiple directions. This substitution allows detection of both impact forces and swinging motions, enabling simulation of both percussion instruments and string instruments like guitar where wristy swinging operations need to be detected.
2Measurement precision
If mercury switch is used to detect swinging angle, then angle detection is achieved, but apparatus cost increases and safety concerns arise
Solution Approach 1:
The patent employs an acceleration sensor instead of a mercury switch. The acceleration sensor is more cost-effective, safer (no mercury), and can be integrated into the operating device. It provides sufficient detection capability for both impact and swinging motions without the drawbacks of mercury-based systems.
Solution Approach 2:
The acceleration sensor serves multiple functions: it detects impact forces for percussion instruments and detects swinging angle and direction for string instruments. This multi-functionality eliminates the need for separate detection systems for different instrument types, reducing overall device complexity and cost.
3Measurement precision
If impact detection method is used, then percussion instrument simulation is achieved, but wristy playing operations cannot be detected
Solution Approach 1:
The patent transitions from one-dimensional impact detection to multi-dimensional acceleration measurement by using an acceleration sensor that detects acceleration in two or more orthogonal directions. This dimensional expansion enables detection of both the magnitude of impact and the direction/angle of swinging motions, accommodating various playing techniques across different instrument types.
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
Enables accurate and practical simulative playing of instruments like guitars by controlling sound output based on the state of the user's stroke operation, allowing for a more immersive and accurate reproduction of musical performances.
Implementation Method 1
The operating means comprises an acceleration sensor for detecting accelerations in directions of at least two axes orthogonal to each other
Data Source
AI summary
A sound output control apparatus includes a controller for a user to perform a stroke operation. The controller is provided with an acceleration sensor for detecting accelerations of two axes, for example. The sum of the accelerations is calculated, and the output of a sound is controlled in accordance with a change in the sum of the accelerations. More specifically, when the sum of the accelerations exceeds each of threshold values associated with strings of a string instrument such as a guitar, a sound corresponding to the threshold value is output.