Boundary Microphone Knob Adjustment Mechanism
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Solution Overview
Problem
Conventional boundary microphones require complex and time-consuming adjustments by skilled personnel to change the sound pickup direction, which increases maintenance costs and may compromise RFI resistance.
Innovation Solution
A boundary microphone design featuring a metal base, a metal cover with sound wave guiding holes, and a slidably mounted microphone unit holder with a knob, allowing users to adjust the microphone unit position externally without opening the device, thus simplifying the process and reducing maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the microphone unit position is changed by opening the cover and manually adjusting internal components, then the sound pickup direction can be changed, but the operation becomes complex and time-consuming requiring skilled personnel
Solution Approach 1:
A knob is introduced as an intermediary mechanism between the user and the microphone unit position. The knob rotates within a hole in the base and is connected to the microphone unit holder, allowing users to adjust the microphone unit position without opening the cover. This mediator simplifies the operation from complex manual internal adjustment to simple external knob rotation.
Solution Approach 2:
The boundary microphone enables users to perform the adjustment themselves using the external knob mechanism, eliminating the need for skilled personnel to open the cover and manually adjust internal components. The system serves itself by providing an user-friendly interface that does not require technical knowledge.
2Adaptability or versatility
If the cover is opened to adjust the microphone unit, then the position can be changed, but the internal components may be damaged and RFI resistance may be compromised
Solution Approach 1:
The knob serves as an intermediary that allows position adjustment without direct access to internal components. By rotating the knob externally, the microphone unit holder moves through the hole in the base, achieving position change while keeping the cover closed and protecting internal components from damage.
Solution Approach 2:
The adjustment function is extracted from the internal component manipulation and moved to an external interface. The knob provides an external means to control the microphone unit position, separating the user interaction from the internal components and eliminating the risk of damage during adjustment.
3Adaptability or versatility
If skilled personnel perform the adjustment by opening the device, then the position can be changed, but maintenance costs increase
Solution Approach 1:
The boundary microphone enables end-users to perform the sound pickup direction adjustment themselves using the external knob mechanism, eliminating the need for skilled personnel intervention. This self-service capability directly reduces maintenance costs by empowering users to handle routine adjustments without professional service calls.
4Stability of the object's composition
If the microphone unit holder is fixed on the base, then the structure is stable, but the sound pickup direction cannot be changed
Solution Approach 1:
The microphone unit holder is designed with dynamic characteristics, allowing it to move relative to the base through the sliding mechanism guided by the hole. The holder can be repositioned by rotating the knob while maintaining stable operation at each position. This dynamic design enables both stability during use and adaptability for reconfiguration.
Solution Approach 2:
The system is segmented into movable and fixed parts: the microphone unit holder is movable along the hole path, while the base remains fixed. This segmentation allows the holder to change position for different sound pickup directions while the overall structure maintains stability. The hole provides a guided path that constrains the movement to desired positions.
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
Enables easy adjustment of the sound pickup direction by non-skilled users without compromising internal components, reducing maintenance costs and ensuring effective noise resistance.
Implementation Method 1
a microphone unit (26) that converts sound into an electric signal
Implementation Method 2
a cover (20) that is made of metal and has a plurality of holes through which a sound wave is guided
Data Source
AI summary
A boundary microphone includes: a base made of metal; a cover that is made of metal and has a plurality of holes through which a sound wave is guided; a microphone unit that converts sound into an electric signal; and a microphone unit holder slidably provided on the base and holds the microphone unit. The microphone unit holder has a knob. The base has a hole through which the knob of the microphone unit holder penetrates the base. The knob of the microphone unit holder and the hole of the base are so provided that the microphone unit holder can be moved with the microphone unit by a movement of the knob within a range defined by the hole.