Microphone Multi-Channel Integrated Device Resonance
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Solution Overview
Problem
Existing microphone and speaker integrated devices suffer from poor acoustic quality due to the speaker's sound cavity design, which affects the microphone's sound amplification and causes squeaking, as vibrations from the speaker interfere with the microphone.
Innovation Solution
A microphone multi-channel integrated device with a speaker body featuring a main cavity and two symmetrical auxiliary cavities, where the main cavity speaker and auxiliary cavity speakers are electrically connected to a PCB, and the transducer is positioned centrally to minimize vibration transmission, along with a structural design that prevents resonance and enhances sound depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sound cavity is used in the speaker design, then the device structure is simple, but the acoustic quality is poor and vibrations affect the microphone
Solution Approach 1:
The single sound cavity is divided into multiple independent cavities (main cavity and auxiliary cavities), each serving specific acoustic functions. This segmentation allows different frequency ranges and sound directions to be handled separately, improving overall acoustic quality while isolating vibration sources
Solution Approach 2:
Isolation structures are introduced as intermediary elements between the speaker cavities and the microphone transducer. These intermediaries block vibration transmission paths while allowing acoustic signals to pass, resolving the conflict between speaker vibration and microphone sensitivity
2Ease of operation
If the speaker and microphone are integrated in a single device, then the device is compact, but the speaker vibrations cause squeaking and compromise microphone sound amplification
Solution Approach 1:
The harmful vibration transmission paths are extracted and removed from the integrated device structure. Isolation structures are strategically placed to take out the vibration coupling between speaker and microphone, allowing the integrated design to maintain compactness while eliminating squeaking and interference
Solution Approach 2:
The vibration energy that would normally cause harmful squeaking is converted into beneficial acoustic output through the auxiliary cavities. The isolation structures redirect vibrations to productive acoustic paths, transforming the harmful effect into enhanced sound quality
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 solution results in rich, deep-bass sounds and reduced squeaking by isolating vibrations, improving acoustic quality and user experience through independent sound emission directions and minimized resonance.
Implementation Method 1
the three independent cavities make sounds emitted by multiple speakers in different directions mellow and rich and realize a strong sense of depth of deep-bass sounds
Implementation Method 2
the first auxiliary cavity structural member is symmetrical with the second auxiliary cavity structural member and the main cavity speaker is symmetrical with the main cavity diaphragm assembly, such that vibration energy generated when sounds are made can be counteracted to realize a vibration elimination effect
Implementation Method 3
the plane where the first auxiliary cavity structural member and the second auxiliary cavity structural member are located is perpendicular to a plane where the main cavity speaker and the main cavity diaphragm assembly are located, and the transducer is located exactly at the central point of the two perpendicular planes, such that squeaking caused by resonance and contact conduction transmitted from the cavities to the transducer can be weakened
Data Source
AI summary
A microphone multi-channel integrated device comprises a speaker body which comprises a main cavity structure. A main cavity speaker, a first auxiliary cavity structural member, a main cavity diaphragm assembly and a second auxiliary cavity structural member are mounted in the main cavity structure through mounting holes. A closed main cavity is defined by the main cavity diaphragm assembly, the main cavity speaker, the first auxiliary cavity structural member, the second auxiliary cavity structural member, an upper main cavity sealing cover, a lower main cavity sealing cover and the main cavity structure. Closed auxiliary cavities are defined by the first auxiliary cavity structural member, the second auxiliary cavity structural member and corresponding auxiliary cavity speakers. Sounds are made mellow and rich by means of the three cavities, and the symmetrical arrangement of parts can reduce squeaking of a microphone caused by resonance.