Electronic Keyboard Speaker Box Partitioning
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Solution Overview
Problem
Conventional electronic keyboard instruments with speaker boxes fail to achieve ample acoustic sound similar to a grand piano, particularly in downward sound radiation, while maintaining a simple construction.
Innovation Solution
The electronic keyboard instrument features a speaker box with a common partition plate dividing it into upper and lower resonance chambers, allowing speakers to emit sounds both upward and downward, mimicking the acoustics of an acoustic piano, and incorporates a stepped portion for efficient space utilization and resonance chamber allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If speakers are mounted to radiate sound upward only, then the construction is simple, but downward sound radiation is insufficient to realize ample acoustic sounds like grand piano
Solution Approach 1:
The speaker box is segmented into upper and lower parts with separate speaker systems. Upward-radiating speakers are positioned in the upper part, while downward-radiating speakers are positioned in the lower part. This segmentation allows each speaker system to be optimized for its specific radiation direction, achieving grand piano-like acoustic quality without requiring a single complex speaker system.
Solution Approach 2:
The invention transitions from a single-direction (upward) sound radiation system to a multi-directional system by adding the vertical dimension. Downward-radiating speakers are positioned at the lower part of the speaker box, creating a three-dimensional sound radiation pattern that mimics the acoustic properties of grand pianos, which radiate sound both upward and downward.
2Device complexity
If separate speaker boxes are used for upward and downward sound emission, then acoustic quality improves, but construction becomes complicated
Solution Approach 1:
The invention merges the upward-radiating speaker system and downward-radiating speaker system into a single integrated speaker box. The upper and lower parts are connected through a partition, forming one unified structure that houses both types of speakers. This merging maintains the acoustic quality of separate systems while simplifying construction and reducing the number of components.
Solution Approach 2:
The speaker box is designed as a multi-functional unit that simultaneously performs both upward sound radiation and downward sound radiation functions. The single speaker box structure serves multiple purposes: it houses upward-radiating speakers for general sound output and downward-radiating speakers for enhanced acoustic quality, eliminating the need for separate speaker boxes.
3Device complexity
If multiple speakers are positioned for both upward and downward radiation, then acoustic performance improves, but space utilization becomes inefficient
Solution Approach 1:
The invention utilizes the vertical dimension within the speaker box to accommodate multiple speakers for both upward and downward radiation. By positioning speakers at different vertical levels (upper part for upward radiation, lower part for downward radiation), the design maximizes space utilization while maintaining excellent acoustic performance across multiple frequency ranges.
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 effectively realizes acoustics similar to a grand piano by directing sound emissions in both directions and simplifies the speaker box construction, ensuring efficient sound distribution and space management.
Implementation Method 1
resonance chambers formed independently of one another in the upper internal space of the speaker box so as to correspond to respective ones of the speakers disposed to be directed upward, and resonance chambers formed independently of one another in the lower internal space of the speaker box so as to correspond to respective ones of the speakers disposed to be directed downward
Data Source
AI summary
An electronic keyboard instrument that emits sounds in both upward and downward directions from speakers solely for upward sound emission and from speakers solely for downward sound emission to realize acoustics similar to that of acoustic piano, and constitutes rear parts of resonance chambers in a speaker box by a common partition plate to prevent the speaker box from becoming complicated in construction. Woofers directed downward are disposed at a lower part of the speaker box, and squawker directed upward are disposed at an upper part of the speaker box. The internal space of the speaker box is partitioned by one horizontal partition plate into an upper space where resonance chambers for the squawkers are defined by vertical partition plates and a lower space where resonance chambers for the woofers are defined by vertical partition plates. Rear parts of the resonance chambers are constituted by the horizontal partition plate.