Speaker Back Cavity Frequency Regulation Modules
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Solution Overview
Problem
Current speaker designs face limitations in improving intermediate-frequency and high-frequency sensations, with traditional methods either compromising other acoustic performances or requiring complex structures and high-performance materials.
Innovation Solution
The introduction of intermediate-frequency and high-frequency frequency response regulation modules within the speaker's back cavity, which adjust the lengths of effective air passages to create a spiral airflow, thereby enhancing resonant frequencies and improving acoustic performance without affecting other frequency bands or requiring high-performance materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sound-absorbing cotton is added to the back cavity to reduce resonant frequency peaks, then intermediate-frequency valleys and peaks are alleviated, but other acoustic performances such as quality factor, resonant frequency, and amplitude are negatively affected
Solution Approach 1:
The patent applies local quality by introducing frequency response regulation modules with specific resonant frequencies tailored to different frequency bands. The back cavity is divided into multiple regions with different acoustic characteristics, where each regulation module targets specific frequency ranges (low-frequency, intermediate-frequency, high-frequency) with customized resonant frequencies to achieve precise acoustic control without compromising overall performance
Solution Approach 2:
The patent changes acoustic parameters by adjusting the resonant frequencies of regulation modules within the back cavity. By modifying parameters such as the volume, shape, and position of regulation modules, the system achieves different resonant frequencies that can be tuned to match or counteract specific frequency response characteristics, thereby improving intermediate-frequency sensation without negatively affecting other acoustic parameters
2Manufacturing precision
If the back cavity volume is enlarged to improve low-frequency sensation, then low-frequency performance is enhanced, but the rigidity of the product system decreases
Solution Approach 1:
The patent segments the back cavity into multiple functional regions by introducing frequency response regulation modules. Instead of treating the back cavity as a single large volume, it is divided into sub-regions with different acoustic functions, allowing the system to achieve enhanced low-frequency sensation through localized volume optimization rather than overall enlargement, thereby maintaining system rigidity
3Manufacturing precision
If high-frequency sensation is extended by using materials with larger hardness or adding dish structures, then high-frequency performance is improved, but the quality factor becomes larger and intermediate-frequency and low-frequency sensations are lowered
Solution Approach 1:
The patent applies local quality by introducing frequency response regulation modules with specific resonant frequencies tailored to different frequency bands. The back cavity is divided into multiple regions with different acoustic characteristics, where each regulation module targets specific frequency ranges (low-frequency, intermediate-frequency, high-frequency) with customized resonant frequencies to achieve precise acoustic control without compromising overall performance
Solution Approach 2:
The patent utilizes mechanical vibration principles by designing regulation modules that generate controlled vibrations at specific resonant frequencies. These vibrations interact with the acoustic field in the back cavity to enhance desired frequency responses. By carefully selecting the resonant frequencies of the regulation modules, the system can boost high-frequency sensation while simultaneously compensating for intermediate-frequency and low-frequency losses through constructive interference and resonance coupling
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 solution enhances intermediate-frequency and high-frequency sensations while avoiding the drawbacks of sound-absorbing cotton, such as performance sacrifices and increased weight, and reduces production costs by eliminating the need for additional materials and complex structures.
Implementation Method 1
a resonant frequency of the back cavity is equivalent to a frequency of intermediate-frequency frequency response of the speaker to be improved
Data Source
AI summary
The invention provides a speaker, an audio device thereof, and a method of regulating frequency response. The speaker comprises a back cavity and a magnetic circuit system connected to the back cavity, and further comprises: an intermediate-frequency frequency response regulation module disposed in the back cavity for regulating a length of a first effective air passage of the back cavity where an air flow passes, such that a resonant frequency of the back cavity is equivalent to a frequency of intermediate-frequency frequency response of the speaker to be improved; and/or a high-frequency frequency response regulation module disposed in the back cavity for regulating a length of a second effective air passage of the back cavity where the air flow passes, such that the resonant frequency of the back cavity is equivalent to a frequency of high-frequency frequency response of the speaker to be improved.