Retractable Stereo Microphone Unit for True XY Recording
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Solution Overview
Problem
Conventional recording devices with an inverted V-shaped arrangement of left and right microphones fail to achieve high recording quality due to lack of vertical differentiation and overlap, limiting their ability to express sound in near and far directions and recording sound from the front.
Innovation Solution
A microphone unit with a retractable mechanism that allows horizontal angle and vertical position adjustment of microphones, enabling switching between true XY and other techniques, ensuring vertical overlap or equality of microphone positions to achieve optimal recording configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If left and right microphones are arranged in an inverted V shape on the same plane, then the device structure is simple, but the recording quality is low due to lack of vertical differentiation and overlap
Solution Approach 1:
The patent transitions the microphone arrangement from a two-dimensional inverted V shape on the same plane to a three-dimensional configuration with vertical differentiation. The left and right microphones are positioned at different vertical heights, creating vertical overlap that enables true XY technique stereo recording while maintaining structural simplicity.
2Measurement precision
If left and right microphones are arranged in vertically different positions with vertical overlap, then recording quality in XY technique is high, but the device structure becomes complex
Solution Approach 1:
The patent designs a retractable mechanism that allows the microphone unit to perform multiple functions: it can be extended to achieve the true XY technique arrangement with vertical differentiation for high-quality stereo recording, and retracted to a compact stored position when recording is not needed. This multi-functionality resolves the contradiction between recording quality and structural complexity.
3Measurement precision
If microphones are extended to achieve true XY technique arrangement, then recording quality is high, but the microphones cannot be stored compactly in the housing
Solution Approach 1:
The patent implements a retractable mechanism that makes the microphone arrangement dynamic rather than fixed. The microphones can be extended to the true XY technique positions during recording operations and retracted to a compact configuration for storage, allowing the system to adapt between high-quality recording mode and compact storage mode, thereby resolving the contradiction between recording quality and storage volume.
Data Source
AI summary
A microphone unit for stereo recording capable of switching an arrangement of left and right microphones between a true XY technique and another technique. A microphone unit for stereo recording, including: a pair of unidirectional left and right microphones; and a retractable mechanism joined to the respective left and right microphones. The retractable mechanism is configured—to allow change in a horizontal angle and a vertical position of each of the left and right microphones.