Sound Reducing Mask With Unidirectional Flap and Muffler
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Solution Overview
Problem
Conventional sound reducing masks restrict airflow and are uncomfortable due to small breathing orifices and heavy rubber materials, failing to effectively eliminate noise while allowing users to shout or cry without disturbing others.
Innovation Solution
A sound reducing mask with a contoured body portion, an air intake assembly featuring a unidirectional flap, and mufflers to manage airflow and absorb sound, ensuring comfortable wear and reduced noise disturbance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional sound reducing masks use small breathing orifices, then noise reduction is improved, but airflow restriction increases making it difficult to breathe
Solution Approach 1:
The mask incorporates a unidirectional flap valve that dynamically opens during inhalation to allow sufficient air intake and closes during exhalation to block noise transmission. This dynamic mechanism resolves the contradiction by providing large effective opening area for breathing while maintaining noise reduction during the opposite phase of respiratory cycle.
Solution Approach 2:
A unidirectional flap valve acts as an intermediary element between the user's breath and the external environment. The flap selectively mediates airflow direction, permitting inhalation while blocking exhalation noise, thus resolving the conflict between breathing ease and noise reduction without requiring small orifices.
2Object-generated harmful factors
If conventional sound reducing masks are made of rubber material, then noise sealing is improved, but weight increases making the mask uncomfortable to wear
Solution Approach 1:
The patent changes the material parameter from traditional rubber to foam material, which provides equivalent or superior noise sealing properties while significantly reducing density and weight. This parameter change resolves the contradiction between noise sealing effectiveness and wearing comfort.
Solution Approach 2:
The mask employs composite construction combining foam material for the main body with strategic placement of sealing elements. This composite approach achieves effective noise sealing through the foam's cellular structure and integrated sealing features while maintaining low overall weight, resolving the contradiction between sealing performance and weight.
3Strength
If conventional sound reducing masks use heavy rubber material, then durability is improved, but comfort decreases due to heavy weight
Solution Approach 1:
The patent changes the material parameter from heavy rubber to lightweight foam material that maintains sufficient mechanical strength and durability for repeated use. The foam material's cellular structure provides both durability through resistance to degradation and comfort through reduced weight, resolving the contradiction between strength and comfort.
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 mask provides sufficient airflow and effectively muffles noise, allowing users to shout or cry without disturbing others, while being comfortable and easy to breathe through.
Implementation Method 1
an air intake assembly comprising an inlet and a unidirectional flap configured to move between an open position and a closed position
Implementation Method 2
a muffler configured to muffle noise made by the user
Implementation Method 3
a body portion contoured to form a seal with the user's face when the body portion is placed over the user's mouth
Data Source
AI summary
Methods and apparatus for a sound reducing mask wearable by a user according to various embodiments may include a body portion contoured to form a seal with the user's face when the body portion is placed over the user's mouth. The sound reducing mask may also include an air intake assembly including an inlet and a unidirectional flap configured to move between an open position and a closed position. Methods and apparatus for a sound reducing mask may further include a muffler configured to muffle noise made by the user.