Perforated Unit Sloping Holes for Sound Release Angle Optimization
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Solution Overview
Problem
Conventional electronic instruments face challenges in optimizing the sound release angle to accurately mimic the key press feeling and tone of a real piano, as they lack adjustable mechanisms to direct sound effectively towards the player.
Innovation Solution
The electronic keyboard instrument incorporates a perforated unit with alternating low-angled and high-angled sloping holes in its casing, allowing sound to be directed towards the player while optimizing the sound release angle by adjusting the sloping angles of these holes, ensuring a balanced and enhanced auditory experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sound releasing holes are used in electronic instruments, then the structure is simple, but the sound release angle cannot be optimized to accurately mimic real piano tone
Solution Approach 1:
The perforated unit is divided into multiple sloping regions (first sloping regions and second sloping regions) with different sloping angles. Each region contains holes oriented at specific angles, segmenting the sound release function into multiple directional channels. This segmentation allows precise control over sound propagation angles while maintaining a unified structural component.
Solution Approach 2:
Different regions of the perforated unit are assigned different local qualities in terms of hole orientation and sloping angles. The first sloping regions have holes sloping at one angle, while the second sloping regions have holes sloping at a different angle. This local differentiation enables optimized sound release characteristics for different frequency ranges or spatial directions without requiring complete structural redesign.
2Reliability
If sound is emitted directly without angle optimization, then the structure is simple, but the feeling of irregularity in sound volume occurs
Solution Approach 1:
The perforated unit alternates between first sloping regions and second sloping regions along the left-right direction, creating a segmented pattern of different sloping angles. This alternating segmentation distributes sound emission across multiple angles, preventing concentration of sound energy in单一 directions and thereby reducing perceived volume irregularity.
Solution Approach 2:
The sloping angle parameter is changed between adjacent regions of the perforated unit. By varying the hole orientation angles between first and second sloping regions, the sound emission parameters are optimized to achieve more uniform sound distribution. This parameter variation compensates for irregularities that would occur with uniform hole orientation.
3Adaptability or versatility
If conventional grilles with variable angles are used, then sound release angle can be adjusted, but the device complexity and mechanism requirements increase
Solution Approach 1:
Instead of making the holes or grilles movable to adjust angles, the invention inverts the approach by making the surrounding structure (perforated unit) stationary with pre-configured holes at different fixed angles. The adaptability is achieved through the geometric arrangement of holes rather than mechanical movement, eliminating complex adjustment mechanisms while maintaining multi-angle sound release capability.
Solution Approach 2:
The invention creates multiple copies of the perforated unit structure, each with holes oriented at different predetermined angles. These copied structures are arranged in alternating first and second sloping regions, providing fixed but varied sound release angles without requiring mechanical adjustment mechanisms. This copying approach achieves versatility through geometric replication rather than mechanical transformation.
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 configuration enhances the sound release effect, reducing the feeling of irregularity in sound volume and optimizing the sound release angle, providing a more immersive playing experience by directing sound effectively towards the player.
Implementation Method 1
a sound emitting unit provided within the casing and a perforated unit provided with respect to the casing. The perforated unit has a wall extending in a left-right direction of the casing, a first sloping hole opened in the wall, sloping from an inside towards an outside of the casing at an acute angle with respect to a front-back direction of the casing, and a second sloping hole opened in the wall, sloping from the inside towards the outside of the casing at a larger acute angle with respect to the front-back direction than the acute angle at which the first sloping hole slopes
Data Source
AI summary
An electronic instrument includes a casing, a controller aligned in a left-right direction and extending in a front-back direction of the casing, a sound emitting unit within the casing, and a perforated unit having a wall along the left-right direction, a first sloping hole sloping from an inside towards an outside of the casing at an acute angle to the front-back direction in the wall, and a second sloping hole sloping from the inside towards the outside of the casing at a larger acute angle with respect to the front-back direction than the acute angle at which the first sloping hole slopes, and the perforated unit includes multiple first sloping regions having the first sloping hole and multiple second sloping regions having the second sloping hole, and the first and second sloping regions are disposed adjacent to each other, and provided along the left-right direction.