Speaker Room Sound Guide for Voice Input Interference
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Solution Overview
Problem
Voice input apparatuses face challenges in accurately recognizing user voice commands due to sound output from speakers being unintentionally recognized as control commands and interference with voice recognition when sound output and input occur simultaneously.
Innovation Solution
The design includes a speaker room with a sound guide and sound discharge port positioned far from the microphone, guiding sound output away from the microphone to reduce volume and prevent unintentional recognition, improving speech recognition rates and sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the speaker and microphone are positioned close to each other for compact device design, then device complexity is reduced, but the sound output from the speaker is unintentionally recognized as a control command by the microphone
Solution Approach 1:
The patent extracts the harmful sound waves from the microphone's input by introducing a sound guide structure. The sound guide protrudes from the speaker and reflects sound waves away from the microphone, effectively removing the interference source while maintaining the compact overall device structure.
Solution Approach 2:
The sound guide acts as an intermediary element between the speaker and the surrounding environment. It intercepts sound waves that would otherwise travel directly to the microphone and redirects them through a controlled path, preventing direct interference while allowing the speaker-microphone proximity for compact design.
2Illumination intensity
If the speaker outputs sound in all directions for omnidirectional sound distribution, then sound quality is improved, but the sound volume introduced into the microphone increases causing interference with voice recognition
Solution Approach 1:
The sound guide creates a localized sound distribution pattern by reflecting sound waves in specific directions. Instead of uniform omnidirectional distribution, the sound is concentrated in areas away from the microphone, providing directional sound quality improvement while minimizing interference in the microphone's vicinity.
Solution Approach 2:
The sound guide redirects sound waves from a direct linear path (speaker to microphone) to a radial or circumferential path around the speaker assembly. This dimensional change in sound wave propagation prevents interference while maintaining sound distribution quality.
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 configuration reduces the volume of sound introduced into the microphone, minimizing the likelihood of sound being misrecognized as a control command and enhances sound quality by effectively transmitting sound to the user.
Implementation Method 1
a sound guide which is protruded upward from the room base, positioned below the diaphragm, and reflects the sound outputted from the diaphragm outward in a radial direction
Data Source
AI summary
Disclosed is a voice input apparatus including: a speaker having a diaphragm for outputting sound downward; a speaker room in which the diaphragm is accommodated; and a microphone disposed outside the speaker room, wherein the speaker room includes: a room base disposed below the diaphragm; a sound guide which is protruded upward from the room base, positioned below the diaphragm, and reflects the sound outputted from the diaphragm outward in a radial direction; and a room sidewall which is extended upward from a circumference of the room base to surround the sound guide, and has a sound discharge port for emitting the sound reflected by the sound guide to the outside of the speaker room.