Microphone with Inverse Phase Modules and Sound Collecting Trough
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Solution Overview
Problem
Conventional microphone designs struggle to effectively separate near-field audio from far-field noise, leading to interference and reduced sound-receiving quality, especially in noisy environments.
Innovation Solution
A microphone device featuring two sound receiving modules with inverse phase outputs connected in parallel, combined with a sound collecting trough that directs near-field audio to one module, enhancing signal strength and canceling out far-field noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional microphone design with a single sound receiving module is used, then the structure is simple, but far-field noise cannot be effectively canceled and sound-receiving quality is reduced
Solution Approach 1:
The microphone device is divided into multiple independent sound receiving modules (first sound receiving module and second sound receiving module), each capable of capturing sound signals independently. This segmentation allows the system to process different acoustic information from different spatial locations, enabling noise cancellation while maintaining clear voice transmission.
Solution Approach 2:
A sound collecting trough is introduced as an intermediary structure between the sound sources and the sound receiving modules. The trough guides and concentrates sound waves, particularly from the far field, toward the modules. This intermediary element enhances the ability to capture and process far-field noise signals for cancellation while preserving near-field voice clarity.
2Object-affected harmful factors
If two sound receiving modules with inverse phase outputs are used to cancel far-field noise, then far-field noise cancellation is improved, but near-field audio reception may be compromised due to signal interference
Solution Approach 1:
The sound receiving modules are positioned at different locations relative to the sound collecting trough, creating local quality differences in their acoustic environments. The first sound receiving module is closer to the trough entrance while the second is farther away, allowing each to experience different sound pressure distributions. This spatial differentiation enables selective cancellation of far-field noise while preserving near-field audio signals.
Solution Approach 2:
The system transitions from a single-point sound reception approach to a multi-dimensional spatial arrangement of sound receiving modules. By distributing modules at different positions and orientations relative to the sound collecting trough, the system creates a three-dimensional acoustic field sampling capability. This dimensional expansion allows independent characterization of near-field and far-field sound components for selective processing.
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 configuration significantly improves sound-receiving quality by effectively canceling far-field noise while maintaining near-field audio reception, resulting in clearer voice transmission.
Implementation Method 1
The first sound receiving module receives a sound signal to output a first electronic signal. The second sound receiving module receives the sound signal to output a second electronic signal. The phase of the first electronic signal and the phase of the second electronic signal are inverse to each other.
Implementation Method 2
another sound signal is transferred to the first sound receiving module through the sound collecting trough
Data Source
AI summary
A microphone device including a first sound receiving module, a second sound receiving module and a sound collecting trough is provided. The first sound receiving module receives a sound signal to output a first electronic signal. The second sound receiving module receives the sound signal to output a second electronic signal. The first sound receiving module is coupled to the second sound receiving module, and the phase of the first electronic signal and the phase of the second electronic signal are inverse to each other. A distance between the first sound receiving module and the sound collecting trough is smaller than a distance between the second sound receiving module and the sound collecting trough, and another sound signal is transferred to the first sound receiving module through the sound collecting trough.