Microphone Test Device Cone-Shaped Channel Acoustic Wave Centralization
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Solution Overview
Problem
Conventional microphone test devices struggle to achieve consistent frequency response curves in both low and high frequency bands, leading to inaccurate testing of sound-receiving functions, especially due to differing acoustic wave reflection phenomena affecting the first, second, and third sound-receiving parts.
Innovation Solution
A microphone test device featuring a standard speaker module with a cone-shaped channel and a sleeve that centralizes the test acoustic wave, reducing scattering and ensuring it is transferred perpendicular to the sound-receiving parts, along with an adjustable mechanism to optimize the alignment and distance between the standard speaker module and the under-test microphone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional microphone test devices use standard speakers and standard microphones arranged beside sound-receiving parts, then the testing setup can cover multiple sound-receiving parts, but the acoustic wave reflection phenomena cause inconsistent frequency response curves in low and high frequency bands
Solution Approach 1:
The patent introduces a wave guide as an intermediary component between the standard speaker and the sound-receiving parts. The wave guide centrally transmits the test acoustic wave to each sound-receiving part, acting as a mediator that controls the acoustic path. This intermediary structure prevents direct acoustic wave reflection from reaching the sound-receiving parts, thereby resolving the contradiction between measurement precision and acoustic wave reflection interference
Solution Approach 2:
The patent segments the acoustic transmission path by using individual wave guides for each sound-receiving part (first, second, and third sound-receiving parts). Each wave guide independently transmits the test acoustic wave from the standard speaker to its corresponding sound-receiving part, isolating the acoustic paths and preventing cross-interference and reflection phenomena, thus achieving consistent frequency response curves across different frequency bands
2Adaptability or versatility
If multiple standard microphones are used to test different sound-receiving parts, then comprehensive testing can be achieved, but the device complexity and cost increase
Solution Approach 1:
The patent makes the wave guide structure universal by designing it to accommodate multiple sound-receiving parts through a single standardized interface. The wave guide system can centrally transmit test acoustic waves to the first, second, and third sound-receiving parts using the same structural design, allowing one wave guide assembly to perform the function of multiple separate testing paths, thereby reducing device complexity while maintaining comprehensive testing coverage
Solution Approach 2:
The patent merges the function of multiple standard microphones into a single wave guide-based transmission system. Instead of using separate standard microphones for each sound-receiving part, the wave guide consolidates the acoustic transmission function, allowing all sound-receiving parts to be tested through a unified structure, thus reducing the number of components needed while maintaining full testing capability
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 design enhances the accuracy of testing by achieving consistent frequency response curves across both low and high frequency bands, improving the reliability of sound-receiving function assessments without the need for multiple standard microphones.
Implementation Method 1
reducing scattering and ensuring it is transferred perpendicular to the sound-receiving parts
Data Source
AI summary
A microphone test device is provided to test a sound-receiving function of an under-test microphone. The microphone test device includes a test platform, a standard speaker module, a fixing mechanism and a pedestal. A sleeve of the standard speaker module includes a cone-shaped channel. A test acoustic wave from the standard speaker is centralized by the cone-shaped channel. Consequently, the interference of the acoustic wave reflection phenomenon is effectively reduced.