Electroacoustic Damping Structure for Shell Resonance Reduction
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Solution Overview
Problem
Existing electronic devices with open acoustic chambers experience significant shell resonance due to airflow turbulence, which compromises user experience and holding comfort, as current damping solutions only provide limited mitigation.
Innovation Solution
A vibration absorption structure is introduced, featuring a damping space filled with a vibration absorption member, such as porous carbon material, and vent holes covered with an isolation mesh, to reduce the impact of airflow turbulence on the device's shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an open acoustic chamber design is adopted to achieve high-quality audio performance, then audio quality is improved, but shell resonance intensifies due to airflow turbulence
Solution Approach 1:
A vibration absorption member is introduced as an intermediary element between the open acoustic chamber and the shell. This member absorbs vibration energy from the airflow turbulence, preventing it from transmitting to the shell and causing resonance, while allowing the open chamber design to maintain its audio quality benefits
Solution Approach 2:
The vibration absorption member converts the harmful vibration energy from airflow turbulence into beneficial damping effects. By absorbing and dissipating this energy, the system transforms what would be harmful resonance into controlled energy dissipation, protecting the shell while maintaining audio performance
2Stability of the object's composition
If a damping element is mounted on a leakage hole in a semi-open chamber design to maintain controllable leakage, then compliance is improved, but shell resonance is only reduced to a limited extent
Solution Approach 1:
Instead of relying solely on localized damping elements at leakage holes, the vibration absorption member is strategically positioned within the acoustic chamber to address the root cause of resonance. This local quality improvement targets the specific area where vibration energy is generated, providing more effective resonance reduction while maintaining the semi-open chamber compliance
3Loss of energy
If an acoustic guide channel with multiple directional changes is provided to absorb airflow vibration energy, then energy attenuation is improved, but shell resonance mitigation remains limited
Solution Approach 1:
The vibration absorption member is extracted and positioned directly within the acoustic chamber, separate from the acoustic guide channel structure. This allows it to independently absorb vibration energy from the airflow before it reaches the shell, providing an additional layer of resonance mitigation that works complementarily with the energy attenuation function of the guide channel
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
The vibration absorption structure effectively reduces shell resonance and enhances user experience by minimizing the impact of airflow-induced vibrations, improving the device's performance and market competitiveness.
Implementation Method 1
The vibration absorption member is located within the damping space
Implementation Method 2
a vibration absorption member, such as porous carbon material
Implementation Method 3
the at least one vent hole is covered with an isolation mesh
Data Source
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AI summary
The present disclosure discloses a vibration absorption structure and an electronic device. The vibration absorption structure is assembled in an electronic device (10) having an internal chamber (20) in which at least one member is placed. The vibration absorption structure includes at least one electroacoustic transducer module (30) and a vibration absorption member (40). At least part of the electroacoustic transducer module (30) is located in the internal chamber (20). The internal chamber (20) is partitioned by the at least one member in the electronic device (20) and the part of the electroacoustic transducer module (30) to form a damping space (21). The vibration absorption member (40) is located in the damping space (21). The present disclosure solves the problem of the shell resonance of the electronic device (10) caused by airflow turbulence generated by vibration sounding, thereby reducing the impact of the airflow on the shell, weakening the resonance of the electronic device (10), and optimizing user experience.