Dynamic Microphone Vibration Isolation for Noise Reduction
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Solution Overview
Problem
Conventional microphones lack high impedance and omni-directional capabilities, resulting in suboptimal electro-acoustic conversion and sound quality due to direct coupling with the handle frame, which fails to isolate unwanted background noise.
Innovation Solution
An audio device with a dynamic microphone and speaker, featuring a shock-absorbing microphone supporter and a built-in speaker assembly connected to a PCB board, allowing for enhanced sound collection and playback with reduced vibration transmission and improved noise isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the audio receiver is directly coupled in the handle frame in a stationary immovable manner, then the structure is simple and stable, but unwanted background noise is collected and sound quality deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the audio receiver movable rather than stationary. The audio receiver is configured to be movable relative to the handle frame, allowing it to dynamically adjust its position. This movement capability enables the audio receiver to avoid collecting background noise while maintaining a relatively simple overall structure, thus resolving the contradiction between structural simplicity and noise rejection.
2Device complexity
If conventional microphones are used, then the structure is simple, but electro-acoustic conversion power and impedance cannot meet requirements
Solution Approach 1:
The patent applies parameter changes by specifying that the audio receiver is of the dynamic type with a diaphragm area of 0.5-2.0 cm² and impedance of 8-16 ohms. These parameter specifications optimize the electro-acoustic conversion power while maintaining a relatively simple microphone structure. The dynamic type audio receiver with specific parameter ranges achieves high conversion efficiency without excessive structural complexity.
3Object-affected harmful factors
If the audio receiver is made movable to reduce noise collection, then sound quality improves, but device complexity increases
Solution Approach 1:
The patent applies dynamics by making the audio receiver movable relative to the handle frame through a simple mounting structure. This movable design allows the audio receiver to dynamically respond to vibrations and reduce background noise collection while maintaining relatively simple overall device complexity. The movability is achieved through a straightforward mechanical arrangement rather than complex mechanisms.
Solution Approach 2:
The patent applies parameter changes by optimizing the diaphragm area (0.5-2.0 cm²) and impedance (8-16 ohms) of the dynamic audio receiver. These parameter specifications enhance the electro-acoustic conversion efficiency and noise rejection capability while keeping the device structure relatively simple, thus improving sound quality without excessive complexity increase.
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 enhances electro-acoustic conversion and overall performance by providing high impedance, good sound quality, and strong omni-directional ability, while the built-in speaker enables instant sound playback and meets various application needs.
Implementation Method 1
There are two mainly types of conventional microphone, which are electromagnetic and capacitive microphones
Implementation Method 2
the microphone is supported on the casing in a dynamic manner for preventing a vibration of the casing being directly transmitted to the microphone
Data Source
AI summary
An audio device includes a casing, a handle frame downwardly extended from a bottom side of the casing, a speaker assembly and a PCB board are received in the casing, and a microphone supported on the casing in a dynamic manner for preventing a vibration of the casing directly transmitted to the microphone. The microphone and the speaker assembly are electrically connected to the PCB board, such that the speaker assembly is adapted for instantly play back a sound signal collected by the microphone. The audio device of the present invention has an advantages of high impedance, good sound quality, and strong omni-directional ability, such that the electro-acoustic conversion effect and overall performance of the audio device is enhanced. At the same time, the audio device has a built-in speaker to instantly play back the sound collected by the microphone so as to fulfill different applications.