Acoustic Coupler Phase Alignment for Speaker Drivers
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Solution Overview
Problem
Existing speaker apparatuses face issues with phase deviation between acoustic signals from different drivers, leading to insufficient acoustic energy distribution, particularly in medium-frequency and high-frequency speaker systems.
Innovation Solution
The speaker apparatus incorporates acoustic couplers with identical passage lengths and specific angle configurations to combine medium/high-frequency signals from coaxial drivers, reducing phase deviation and enhancing acoustic energy output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If throats are positioned to each other accurately to reduce phase deviation, then phase consistency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces an acoustic coupler as an intermediary component that receives acoustic signals from multiple drivers and combines them before output. This mediator structure allows for more flexible positioning of individual drivers while maintaining phase consistency through the controlled acoustic path within the coupler, reducing the stringent positioning precision requirements between drivers.
Solution Approach 2:
The patent changes the acoustic path length parameter by designing equal-length acoustic passages from each driver inlet to the common outlet in the acoustic coupler. This parameter control ensures that acoustic signals from different drivers arrive at the same phase at the outlet, resolving the phase deviation issue without requiring extremely precise driver positioning.
2Device complexity
If outlets of throats are arranged in line in longer axis direction, then structural simplicity is improved, but acoustic energy becomes insufficient
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement of throat outlets to a configuration where multiple outlets converge at a common outlet point in three-dimensional space. The acoustic passages are arranged in different spatial directions but maintain equal lengths, allowing acoustic energy from multiple drivers to combine constructively at the common outlet without requiring a simple linear arrangement.
3Adaptability or versatility
If MF speaker and HF speaker are disposed separately, then frequency range coverage is improved, but phase deviation between frequency bands increases
Solution Approach 1:
The patent merges the acoustic output paths of MF and HF speakers by having both drivers connect to a common outlet through the acoustic coupler. The acoustic passages from both driver types are designed with equal lengths, ensuring that acoustic signals across different frequency bands arrive at the common outlet in phase, thereby maintaining phase consistency while covering a broad frequency range.
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 effectively reduces phase deviation and increases acoustic energy output, ensuring consistent and high sound pressure levels across the frequency range, particularly in line array speaker systems.
Implementation Method 1
The first acoustic signals output from the first acoustic drivers are respectively inlet into the inlets, the first acoustic signals inlet into the inlets are guided to the common outlet
Data Source
AI summary
A speaker apparatus includes first acoustic drivers that respectively output first acoustic signals, and an acoustic coupler having acoustic passages. The acoustic passages respectively include inlets, and an outlet of the acoustic passages is common. The first acoustic signals output from the first acoustic drivers are respectively inlet into the inlets, the first acoustic signals inlet into the inlets are guided to the common outlet, the first acoustic signals are combined at the common outlet to generate a second acoustic signal, and the second acoustic signal is output. Lengths of the acoustic passages from the inlets to the common outlet are identical to each other.