Speaker Baffle Plate Cutouts for Acoustic Reflection Management
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Solution Overview
Problem
Existing speaker designs suffer from deterioration in acoustic characteristics due to sound reflections on the baffle plate, leading to peaks and dips in frequency response, which increase manufacturing costs when attempting to mitigate these issues with sound absorbing members.
Innovation Solution
The speaker design incorporates a baffle plate with cutouts that increase in width with distance from the sound source, creating regions with different reflection characteristics to manage sound pressure and reduce the impact of sound reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sound absorbing members are attached to the periphery of the speaker unit, then acoustic characteristics are improved, but manufacturing cost increases
Solution Approach 1:
The baffle plate is segmented by forming cutouts that divide the plate into multiple regions with different reflection characteristics. This segmentation creates acoustic zones that manage sound reflections without requiring additional sound absorbing members, thereby improving acoustic characteristics while avoiding increased manufacturing costs.
Solution Approach 2:
The invention converts the harmful effect of sound reflections on the baffle plate into a beneficial effect by designing cutouts that create regions with different reflection characteristics. Instead of trying to eliminate reflections through sound absorbing members, the design utilizes controlled reflections from different regions to achieve improved acoustic characteristics.
2Reliability
If sound absorbing members are attached to reduce reflected sound pressure, then acoustic characteristics improve, but device complexity increases
Solution Approach 1:
The baffle plate is divided into multiple regions through cutouts, creating a segmented structure with different reflection characteristics in each region. This segmentation approach manages sound reflections inherently through the plate's geometry rather than adding separate sound absorbing components, thus improving acoustic characteristics without increasing device complexity.
3Reliability
If the baffle plate is modified with cutouts, then sound reflection characteristics improve, but manufacturing precision requirements increase
Solution Approach 1:
The invention modifies the baffle plate by introducing cutouts with specific geometric parameters that create regions of different reflection characteristics. By changing the physical structure through cutouts rather than adding separate components, the design achieves improved sound reflection management while the precision requirements are confined to the cutout fabrication process rather than assembly of multiple parts.
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 mitigates the steepness of dips and peaks in frequency response, improving acoustic characteristics without the need for additional sound absorbing members, thereby reducing manufacturing costs.
Implementation Method 1
sounds emitted in a frontward direction from each speaker unit are diffracted, and the diffracted sounds are reflected at various points on the baffle plate
Implementation Method 2
sounds emitted in a frontward direction from each speaker unit
Implementation Method 3
sounds emitted in a frontward direction from each speaker unit are diffracted, and the diffracted sounds are reflected at various points on the baffle plate
Data Source
AI summary
A speaker, including: a casing having a baffle plate; and a sound source fixed to the baffle plate of the casing, wherein at least one cutout is formed in the baffle plate, the at least one cutout having a configuration in which a width of the at least one cutout increases with an increase in a distance from the sound source.