Adjustable Microphone Aiming for Multi-Occupant Voice Recognition
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Solution Overview
Problem
Conventional voice recognition systems in vehicles require multiple microphones to accurately distinguish between multiple occupants, increasing cost and complexity.
Innovation Solution
A microphone device with adjustable aiming angles, using a physical barrier rib to separate microphones and a motor-driven adjustment mechanism, combined with a voice recognition system that adjusts microphones to focus on the speaker's voice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam forming technique or noise cancelling technique using dual microphone for every seat is used, then voice recognition accuracy for multiple occupants is improved, but the number of microphones increases to at least eight for a 4-seat vehicle, increasing cost and development cost
Solution Approach 1:
The patent implements dynamic adjustment of microphone aiming angles through angle adjustment devices that can rotate each microphone independently. This allows the system to adaptively track and focus on the active speaker's position in real-time, replacing the need for multiple fixed microphones with a smaller number of dynamically adjustable microphones, thereby reducing component quantity while maintaining recognition accuracy
Solution Approach 2:
The system changes the spatial orientation parameter of microphones by adjusting their aiming angles vertically and horizontally. This parameter adjustment enables the microphones to redirect their sensitivity toward the speaker's location, achieving accurate voice recognition with fewer microphones by optimizing their directional coverage rather than increasing their number
2Measurement precision
If multiple microphones are used to distinguish between multiple occupants, then voice recognition accuracy is improved, but device complexity and cost increase
Solution Approach 1:
Each microphone in the patent is equipped with multi-directional adjustment capabilities (vertical and horizontal angles) and can serve multiple seats and positions. This universal design allows a single microphone to effectively monitor and switch between multiple occupants, reducing the need for dedicated microphones for each seat and thereby simplifying the overall system architecture
Solution Approach 2:
The dynamic angle adjustment mechanism allows microphones to adapt their orientation based on the active speaker's position. This dynamic reconfiguration enables a smaller number of microphones to cover multiple positions sequentially, reducing system complexity compared to having fixed microphones for each position
3Device complexity
If microphones are fixed in position, then device complexity is reduced, but the ability to accurately track and recognize speaker's voice in different positions deteriorates
Solution Approach 1:
The patent introduces angle adjustment devices that enable microphones to dynamically change their aiming angles in the vertical direction. This dynamic adjustment allows the microphones to track the speaker's voice as the speaker moves to different positions, maintaining high recognition accuracy without requiring a complex array of fixed microphones for every possible position
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
Accurately recognizes the speaker's voice by removing noise and reducing the number of microphones needed, thereby lowering costs and improving recognition accuracy.
Implementation Method 1
a motor which includes a motor shaft and receives power to rotate the motor shaft, and a driving gear which is fixedly mounted at the motor shaft to rotate together with the motor shaft
Implementation Method 2
The body is hingedly connected to the frame through a hinge pin to be hinged so that as the adjustment rod slidably connected to the one end of the body moves along the extension direction, the microphone rotates around the hinge pin in the vertical direction
Implementation Method 3
at least one barrier rib which passes the reference point, extends in a radial direction, and has a predetermined height in a vertical direction to physically divide the plurality of microphones
Data Source
AI summary
Disclosed is a microphone device with an adjustable aiming angle. The microphone device includes a frame, a plurality of microphones, each including a head which detects a voice of a user and a body extending in a length direction from the head toward a reference point and hingedly connected to the frame, at least one barrier rib which passes the reference point, extends in a radial direction, and has a predetermined height in a vertical direction to physically divide the plurality of microphones; and an angle adjustment device which is slidably connected to one end of the body extending in the length direction toward the reference point in the length direction of the body to rotate the corresponding microphone relative to the frame in the vertical direction. A voice recognition system and a voice recognition method using the microphone device are further provided.