Microphone Noise Muffler With Curved Airflow Deflection
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Solution Overview
Problem
Microphones in outdoor environments are adversely affected by wind-generated turbulence, which interferes with the quality of captured sound.
Innovation Solution
Aerodynamic noise mufflers with a cylindrical, spherical, or aerodynamic body design that deflects airflow away from the microphone, incorporating a sponge to further stabilize the airflow and direct sound waves towards the microphone, reducing turbulence and enhancing sound capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a microphone is used in outdoor environments, then sound capture capability is provided, but wind-generated turbulence interferes with sound quality
Solution Approach 1:
The patent introduces an intermediary object (the muffler with aerodynamic body) between the wind and the microphone. This intermediary deflects airflow away from the microphone, acting as a mediator that protects the microphone from wind-generated turbulence while allowing sound waves to pass through to the microphone for capture.
2Object-affected harmful factors
If a muffler is added to reduce wind noise, then wind-induced noise interference is reduced, but device complexity increases
Solution Approach 1:
The muffler is segmented into distinct functional components: an aerodynamic body for deflecting airflow, a sponge material for absorbing and stabilizing turbulence, and a mounting structure for attachment. This segmentation allows each component to be optimized independently while working together to reduce wind noise.
Solution Approach 2:
The patent employs composite construction by combining different materials with complementary properties: the aerodynamic body (rigid structure) works with the sponge material (soft, turbulence-absorbing). This composite approach creates a muffler that effectively reduces wind noise while maintaining structural integrity and ease of attachment.
3Object-generated harmful factors
If aerodynamic body shape is used, then turbulence is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs curved and rounded geometries in the aerodynamic body design, avoiding sharp edges and corners that would generate turbulence. The curved surface smoothly guides airflow around the muffler, reducing turbulence generation. This spheroidality principle is applied to the outer shell and transition surfaces of the muffler structure.
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
The design effectively reduces wind-induced noise interference, allowing for clearer sound capture by microphones in outdoor environments.
Implementation Method 1
Aerodynamic noise mufflers with a cylindrical, spherical, or aerodynamic body design that deflects airflow away from the microphone
Implementation Method 2
incorporating a sponge to further stabilize the airflow and direct sound waves towards the microphone
Implementation Method 3
provide for an amplification effect from an inside curvature that is capable of concentrating the intended sound waves towards the receiving microphone
Data Source
AI summary
A noise muffler for a microphone includes a circumferential sidewall, a shroud, a hollow support stem, and a sponge. The circumferential sidewall extends from a rear wall and includes a curved inner surface. The shroud extends from at least a portion of the circumferential sidewall and comprises a curved outer surface and a curved inner surface. The hollow support stem extends from a generally central location of the rear wall and is aligned with an opening in the rear wall. The support stem includes a plurality of openings uniformly positioned around an outer surface of the support stem. The sponge is disposed around the support stem and conforms with the curved inner surface of the shroud and the curved inner surface of the sidewall. The shroud and the sponge deflect airflow away from the opening in the rear wall.