Gooseneck Microphone Shielding via Composite Pipe and Cable Constraint
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Solution Overview
Problem
Gooseneck condenser microphones are prone to noise generation due to incomplete shielding of electromagnetic waves, particularly from cellular phones, as the flexible pipe's shielding function is not effective, and the use of nonflexible metallic pipes can lead to looseness contact noise when the microphone cable moves.
Innovation Solution
The microphone cable is inserted through the support pipe with the shielded wire exposed throughout its length, and conductive contacts or elastic linear bodies are used to ensure continuous contact with the support pipe's inner surface, restricting cable movement and enhancing electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible pipe is used as the support pipe, then the condenser microphone unit can be easily brought close to the mouth of a speaker by the flexibility of the flexible pipe, but the shielding function against electromagnetic waves is incomplete and noise is generated
Solution Approach 1:
The support pipe is constructed as a composite structure combining a flexible pipe (for flexibility) with a metallic pipe (for shielding). The flexible pipe is inserted through the metallic pipe, creating a composite structure that integrates both flexibility and electromagnetic shielding capabilities, resolving the contradiction between ease of operation and protection against electromagnetic waves
Solution Approach 2:
The metallic pipe serves as an intermediary shielding structure between the flexible pipe and the external electromagnetic environment. It provides the shielding function that the flexible pipe alone cannot provide, while allowing the flexible pipe to maintain its flexibility and adjustability
2Object-affected harmful factors
If a nonflexible metallic pipe is used in the support pipe, then the shielding function is improved, but the microphone cable moves loosely and looseness contact noise is generated
Solution Approach 1:
The support pipe combines a metallic pipe (providing shielding) with a flexible pipe (preventing cable movement). The flexible pipe is inserted through the metallic pipe, creating a composite structure where the flexible pipe constrains the microphone cable and prevents looseness contact noise, while the metallic pipe provides electromagnetic shielding
Solution Approach 2:
The flexible pipe is positioned specifically in the portion where cable movement constraint is needed, while the metallic pipe provides shielding in the same area. This local arrangement ensures that both functions are achieved without compromising either shielding effectiveness or cable stability
3Object-affected harmful factors
If the shield covered wire is exposed throughout the entire length, then the shielding function is improved, but the cable movement is not restricted and looseness contact noise occurs
Solution Approach 1:
The flexible pipe acts as an intermediary structure that simultaneously provides mechanical constraint to the cable and allows the shield covered wire to remain exposed for shielding. It mediates between the need for cable stability and the need for exposed shielding wire, preventing looseness contact noise while maintaining shielding effectiveness
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 electromagnetic shielding and prevents noise generation from looseness contact, maintaining effective shielding even in nonflexible metallic pipe sections while allowing for flexible pipe use without excessive bending.
Implementation Method 1
wing pieces on both sides are extended in the direction substantially perpendicular to the axis line of the microphone cable so as to be in contact elastically with the inner surface of the support pipe
Implementation Method 2
the shield covered wire having no skin is exposed throughout the entire length thereof, and is provided with a conductive contact... the shield covered wire is brought into contact with the inner surface of the flexible pipe at many points
Data Source
AI summary
In a gooseneck condenser microphone that supports a condenser microphone unit via a support pipe, when the microphone is used by inserting a microphone cable through the support pipe in the state in which a shield covered wire having no skin is exposed throughout the entire length thereof, the movement of the microphone cable in the support pipe is restricted, by which the generation of noise caused by looseness contact of the shield covered wire with the inner wall of the support pipe is prevented. The microphone cable 40 is inserted through the support pipe in the state in which the shield covered wire 43 having no skin is exposed throughout the entire length thereof, and is provided with a conductive contact, in which the central part 51 thereof is held in a state of conducting with the shield covered wire 43, and wing pieces 52 on both sides are extended in the direction substantially perpendicular to the axis line of the microphone cable 40 so as to be in contact elastically with the inner surface of the support pipe, in the predetermined portion of the shield covered wire 43.