Mask Apparatus Dynamic Voice Amplification Control
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Solution Overview
Problem
Conventional multi-functional masks do not effectively control voice amplification based on breathing characteristics, leading to inconvenience, noise interference, and howling phenomena during conversations, as the voice amplification function is not dynamically managed according to the user's breathing state, resulting in suboptimal voice output and increased noise levels.
Innovation Solution
A mask apparatus equipped with a pressure sensor to determine the user's breathing state and control the voice output of the speaker, activating it during exhalation and deactivating it during inhalation, and incorporating a voice processing module to correct frequency characteristics and prevent noise through equalization and noise gating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the voice amplification function is activated continuously, then voice output is always available, but breathing sound and fan noise are amplified causing inconvenience and noise interference
Solution Approach 1:
The voice amplification function transitions from a static continuous activation state to a dynamic state that automatically adjusts based on real-time detection of user breathing patterns. The system activates amplification only during exhalation phases when voice output is needed, and deactivates during inhalation phases to avoid amplifying breathing sounds and fan noise.
Solution Approach 2:
The system implements feedback control by continuously monitoring breathing sound characteristics through the microphone and pressure sensor, automatically determining when the user is exhaling versus inhaling, and adjusting the voice amplification function accordingly without requiring manual user input.
2Measurement precision
If the microphone is disposed adjacent to the respiratory tract, then voice recognition rate increases, but breathing sound is directly input causing unnecessary noise
Solution Approach 1:
The system maintains the microphone's fixed position near the respiratory tract for optimal voice capture, but dynamically controls the amplification function based on real-time detection of breathing phases, ensuring amplification occurs only when voice output is needed during exhalation.
Solution Approach 2:
The system changes the operational parameter of the amplification function (on/off state) based on detected breathing characteristics, transitioning between active and inactive states to prevent amplification of breathing sounds while maintaining voice amplification capability when needed.
3Object-affected harmful factors
If the voice amplification function is deactivated, then breathing sound and fan noise are not amplified, but voice output is not available when needed
Solution Approach 1:
The system continuously monitors breathing patterns through pressure sensors and microphones, using this feedback to automatically determine when to activate or deactivate voice amplification, ensuring availability during exhalation while preventing noise amplification during inhalation.
Solution Approach 2:
The system activates voice amplification in advance during the exhalation phase before the user speaks, ensuring voice output is ready when needed, and deactivates during inhalation to prevent noise amplification.
4Volume of moving object
If the microphone and speaker are disposed adjacent to each other in the compact mask, then portability is improved, but howling phenomenon occurs due to sound feedback
Solution Approach 1:
The system dynamically controls the amplification function to activate only during exhalation phases and deactivate during inhalation phases, reducing continuous sound feedback loops that cause howling while maintaining compact microphone and speaker placement.
Solution Approach 2:
The voice amplification function operates periodically synchronized with the user's breathing rhythm, activating during exhalation and deactivating during inhalation, which interrupts continuous feedback loops and reduces howling phenomena.
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 solution ensures clear and effective voice output during conversations by dynamically managing the voice amplification function based on breathing characteristics, reducing noise interference and preventing howling, thereby enhancing user convenience and conversation quality.
Implementation Method 1
a pressure sensor installed in the mask body to measure a pressure of the breathing space
Data Source
AI summary
Provided is a mask apparatus. The mask apparatus includes a mask body in which a microphone and a speaker are installed, a face guard coupled to a rear surface of the rear body so as to be in close contact with a user's face and having a breathing space therein, a pressure sensor installed in the mask body to measure a pressure of the breathing space, and a controller configured to compare a current pressure value measured by the pressure sensor to a reference pressure value and control a voice output of the speaker based on a difference between the current pressure value and the reference pressure value.