Speaker Box Resonator Structure for High-Frequency Acoustic Performance
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Solution Overview
Problem
Conventional speaker boxes in portable devices suffer from limited high-frequency acoustic performance due to a monotonous structure, leading to harsh sounds and poor sound effects caused by restricted high-frequency responses.
Innovation Solution
The speaker box incorporates an auxiliary acoustic cavity and a damping mesh, along with a resonator structure formed by a through-hole, which increases the volume of the front cavity and reduces the Q value of the high-frequency resonance peak, enhancing high-frequency acoustic performance and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the front cavity volume is increased to improve high-frequency acoustic performance, then the high-frequency response quality improves, but the device volume and structural complexity increase
Solution Approach 1:
The patent introduces a resonator structure nested within the existing front cavity, where the resonator cavity is formed by a through-hole penetrating the diaphragm. This nested configuration allows the system to achieve enhanced high-frequency acoustic performance through the resonator's acoustic mass and compliance without significantly increasing the overall front cavity volume, effectively solving the contradiction between performance improvement and volume constraint
Solution Approach 2:
The patent modifies the acoustic parameters of the front cavity by introducing the resonator structure, which changes the acoustic mass and compliance of the system. By adjusting the resonator's geometry (through-hole diameter, length, and position), the high-frequency resonance characteristics are optimized, improving acoustic performance without requiring a proportional increase in cavity volume
2Object-affected harmful factors
If a resonator structure is added to reduce the Q value of high-frequency resonance peak, then the harsh sounds and sharp dentilabial sounds are reduced, but the device structure becomes more complex
Solution Approach 1:
The resonator structure is nested within the existing speaker assembly by forming a through-hole in the diaphragm, creating a compact resonator cavity that integrates with the front cavity. This nested design achieves the beneficial effect of reducing Q value and eliminating harsh sounds while minimizing the increase in structural complexity, as the resonator utilizes existing structural elements
Solution Approach 2:
The patent applies local quality modification by introducing the resonator structure at specific locations within the front cavity. The through-hole's position, diameter, and depth are locally optimized to target specific high-frequency resonance issues, reducing harsh sounds and sharp dentilabial sounds without requiring global structural changes, thus limiting the increase in overall device complexity
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 improves high-frequency acoustic performance, reduces harsh sounds, and increases the applicability of the speaker box by creating a more flexible and diverse acoustic structure, resulting in better sound quality and reduced sensitivity to resonance peaks.
Implementation Method 1
a resonator structure formed by a through-hole, which increases the volume of the front cavity and reduces the Q value of the high-frequency resonance peak
Implementation Method 2
The speaker box incorporates an auxiliary acoustic cavity and a damping mesh, along with a resonator structure formed by a through-hole, which increases the volume of the front cavity and reduces the Q value of the high-frequency resonance peak
Data Source
AI summary
The present disclosure provides a speaker box which comprises a shell, a speaker, a support wall, and a sound guide channel. The speaker is fixed to be supported on the support wall. The diaphragm of the speaker partitions the receiving space into a front sound cavity and a rear cavity. The sound guide channel communicates the front sound cavity with the outside and forms the front cavity with the front sound cavity. The speaker box also comprises a surrounding wall and a cover plate arranged on the surrounding wall. The surrounding wall is located on the outside of the support wall, and the shell, surrounding wall, support wall and cover plate are jointly enclosed as auxiliary acoustic cavity. Compared with the related art, the high frequency acoustic performance of the speaker box of the present disclosure is excellent.