Microphone Damping Structure for Vibration Isolation in Head-Mounted Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing microphones in consumer electronic products, such as head-mounted displays, suffer from poor voice signal quality due to direct contact with the casing, which transmits vibrations and causes noise interference.
Innovation Solution
A microphone design featuring a base with damping portions and a flexible circuit board with bending sections, which absorbs and blocks vibrations, preventing direct contact with the casing and reducing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the microphone is fixed on the casing by adhering or locking, then the microphone is securely mounted, but vibration of the casing is directly transmitted to the microphone causing noise interference
Solution Approach 1:
The patent introduces a damping structure as an intermediary component between the microphone and the casing. This damping structure includes a damping layer and a damping cavity that acts as a mediator to absorb and isolate vibrations, preventing direct transmission from the casing to the microphone while maintaining secure mounting.
Solution Approach 2:
The patent applies beforehand cushioning by incorporating a damping layer and damping cavity structure in advance within the base. This pre-configured damping structure is designed to absorb and attenuate vibrations before they reach the microphone, providing proactive protection against vibration interference during the sound receiving process.
2Device complexity
If the microphone is fixed directly on the casing, then the structure is simple, but noise derived from vibration results in poor quality of voice signals
Solution Approach 1:
The patent segments the base structure into multiple functional components: a supporting layer, a damping layer, and a damping cavity. This segmentation allows each layer to perform its specific function - the supporting layer provides structural support, the damping layer absorbs vibrations, and the damping cavity enhances vibration isolation - thereby improving voice signal quality while maintaining reasonable structural complexity.
Solution Approach 2:
The patent employs composite material structure by combining different materials with complementary properties. The base consists of a supporting layer and a damping layer made of different materials, where the damping layer material is specifically selected for its vibration absorption properties. This composite structure effectively reduces vibration transmission while maintaining overall structural integrity.
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 microphone effectively reduces noise from vibrations, improving sound receiving quality by suspending the sound receiving element and using damping and flexible circuit board structures to absorb and prevent vibration transmission.
Implementation Method 1
the base has the plurality of damping portions, which are respectively located on both sides of the sound receiving element. During the use of the microphone, vibration from the head-mounted display or in the environment may be absorbed by the plurality of damping portions of the base
Implementation Method 2
the flexible circuit board having the plurality of bending sections is employed, which prevents transmission of vibration from the flexible circuit board to the sound receiving element, thus preventing the sound receiving algorithm of the microphone from interference by the vibration
Data Source
AI summary
A microphone includes a base, at least one sound receiving element, and a flexible circuit board. The base has a plurality of supporting portions, a plurality of damping portions, and a bearing portion. The plurality of supporting portions are spaced apart from each other. Each of the plurality of damping portions is disposed on an inner surface of the corresponding supporting portion. The bearing portion is connected to the plurality of damping portions and is suspended between the plurality of supporting portions. The at least one sound receiving element is disposed on the base. The flexible circuit board is disposed on the base and has a first transmission segment. The first transmission segment is electrically coupled to the at least one sound receiving element, and the first transmission segment has a plurality of bending sections.