Age-Adaptive Sound Playback System Using Voice Recognition
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Solution Overview
Problem
Current voice assistant programs do not account for users' age when adjusting output sound, leading to inadequate sound pressure level and frequency range adjustments for individuals with varying degrees of hearing loss across different age groups.
Innovation Solution
A sound playback system comprising a near-end electronic device and a remote voice system that receives a user's age via voice signal, performs voice recognition, and adjusts the output sound signal's frequency bands using an equalizer to optimize sound emission based on the user's age, ensuring better hearing compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If voice assistant programs use standard output sound for all users, then device complexity is reduced, but hearing compatibility for different age groups deteriorates
Solution Approach 1:
The system changes the frequency parameters of the output sound signal based on the user's age. The processing module adjusts the gain of different frequency bands according to age-related hearing loss patterns, where elderly users receive enhanced high-frequency content and younger users receive standard or enhanced low-frequency content. This parameter adjustment resolves the contradiction by adapting the sound output to different user groups without requiring complex hardware modifications.
Solution Approach 2:
The patent introduces an equalizer as an intermediary component between the voice recognition module and the sound output module. The equalizer processes the voice signal by adjusting frequency band gains based on age information, acting as a mediator that transforms the standard voice signal into age-appropriate output without requiring complex changes to the core voice assistant system.
2Adaptability or versatility
If the system adjusts output sound frequency bands based on user age, then hearing compatibility is improved, but processing complexity increases
Solution Approach 1:
The system performs preliminary voice recognition to obtain the user's age information before processing the actual voice command. By determining the user's age in advance, the processing module can pre-configure the appropriate frequency band gains for the equalizer, simplifying the subsequent sound processing operations and reducing real-time computational complexity.
Solution Approach 2:
The processing module changes the gain parameters of different frequency bands based on the user's age category. Instead of complex individualized adjustments, the system uses age groups to select from predefined parameter sets, reducing processing complexity while maintaining effective age-based sound adaptation.
3Adaptability or versatility
If high-frequency volume is increased for elderly users, then hearing loss compensation is improved, but overall sound pressure level balance deteriorates
Solution Approach 1:
The equalizer applies different gain adjustments to different frequency bands based on the user's age. For elderly users, high-frequency bands receive increased gain while low-frequency bands maintain or reduce gain, creating localized quality enhancement in the frequency domain. This resolves the contradiction by applying targeted adjustments rather than uniform sound pressure level changes across all frequencies.
Data Source
AI summary
A sound playback system and an output sound adjusting method thereof are disclosed. The method includes the following steps: receiving an input sound signal from a user, wherein the input sound signal includes a voice signal indicating the age of the user; transmitting the input sound signal to a remote voice system; performing a voice recognition process according to the voice signal of the input sound signal to obtain a voice recognition result; adjusting a gain value of each frequency band of an output sound signal according to the voice recognition result; and transmitting the output sound signal to a near-end electronic device to output the output sound signal to be heard by the user.