LED Microphone Positioning Feedback for Speech Quality
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Solution Overview
Problem
Existing audio input apparatuses face challenges in maintaining clear voice transmission in noisy environments due to ineffective noise cancellation, especially when handheld microphones are used improperly, leading to unclear voice sounds and poor speech quality.
Innovation Solution
The implementation of a communication apparatus with a noise-cancellation processing unit, a speech-quality evaluation unit, and a light-emission control system that uses LEDs to notify users of optimal microphone positioning and noise cancellation effectiveness, ensuring effective noise cancellation and clear voice transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a handset microphone is used to allow user mobility, then ease of operation is improved, but speech quality deteriorates when held improperly (e.g., on shoulder or at long distance)
Solution Approach 1:
The patent employs a light-emitting device (LED) that provides real-time visual feedback to the user about the quality of voice pickup. The LED indicates whether the microphone is positioned correctly relative to the user's mouth, enabling the user to adjust their holding position to achieve optimal speech quality while maintaining mobility.
Solution Approach 2:
The light-emitting device changes its emission state (on/off/repeated on-off) to visually indicate different pickup conditions. This allows users to quickly understand whether their microphone positioning is appropriate without requiring complex displays or interfaces.
2Object-affected harmful factors
If a sub-microphone is used for noise cancellation, then noise suppression capability is improved, but speech quality deteriorates when the sub-microphone picks up more voice sounds than the main microphone
Solution Approach 1:
The system uses the light-emitting device to provide feedback about the effectiveness of noise cancellation. When the sub-microphone picks up excessive voice sounds that interfere with noise cancellation performance, the LED indicates this condition, alerting the user to adjust their positioning to restore proper noise suppression while maintaining speech quality.
3Loss of information
If a light-emitting device is added to indicate pickup conditions, then information about speech quality is improved, but device complexity increases
Solution Approach 1:
The patent uses a simple light-emitting device that conveys multiple states of pickup quality through different emission patterns (on/off/repeated on-off). This provides comprehensive information about microphone positioning and noise cancellation effectiveness without requiring complex displays, processors, or user interfaces.
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 solution enhances speech quality by providing real-time feedback on microphone positioning and noise cancellation, improving voice clarity even in noisy environments and guiding users to adjust their usage for better performance.
Implementation Method 1
a light-emitting device configured to emit light
Data Source
AI summary
The used condition of a simplex communication apparatus is notified with a light-emitting device attached to the communication apparatus. It is determined whether a communication mode of the simplex communication apparatus is a transmission mode or a standby mode. A sound pick-up state of a sound carried by a speech signal to be transmitted is determined if the communication mode is the transmission mode. The light-emitting device is controlled so that it is turned off, turned on or repeatedly turned on and off based on determination results of the communication-mode determination and the sound pick-up state determination.