Vocal Feedback Device Isolating Fundamental Frequency
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Solution Overview
Problem
Current vocal training techniques fail to effectively improve vocal quality, particularly for individuals with conditions like Parkinson's disease, as they struggle to detect and modulate fundamental frequencies due to dominant distracting harmonics, leading to ineffective communication.
Innovation Solution
A vocal feedback device that uses a microphone, fundamental frequency accentuator, and delay circuit to accentuate the fundamental frequency of a user's speech and introduce a time delay, providing self-feedback to enhance awareness and modulation of tonal qualities, cadence, and amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional vocal training techniques are used, then users can attempt to improve their vocal quality, but users with conditions like Parkinson's disease cannot effectively detect and modulate fundamental frequencies due to dominant distracting harmonics
Solution Approach 1:
The device extracts and isolates the fundamental frequency from the complex vocal signal by using a microphone to capture the voice, processing it through electronic circuits to separate the fundamental frequency component from the harmonic components, and then presenting only the accentuated fundamental frequency to the user through a speaker or headphones. This extraction process removes the distracting harmonics that normally mask the fundamental frequency.
Solution Approach 2:
The device applies selective amplification to enhance only the fundamental frequency component of the vocal signal while leaving other frequency components unchanged or attenuated. This local enhancement of the specific frequency region containing the fundamental frequency allows users to clearly detect and modulate it without being overwhelmed by the full spectrum of vocal harmonics.
2Ease of operation
If fundamental frequency is accentuated with delay, then user awareness and modulation ability improve, but the device complexity increases
Solution Approach 1:
The device creates a closed-loop feedback system where the user's voice is captured, processed to accentuate the fundamental frequency, delayed by a可控 time period, and then presented back to the user. This feedback loop allows users to hear the immediate effect of their vocal modulations, enabling them to learn and control their fundamental frequency in real-time, thereby improving ease of operation despite the processing complexity.
Solution Approach 2:
The device performs preliminary processing of the vocal signal by pre-accentuating the fundamental frequency before presenting it to the user. The delay circuit introduces a predetermined time delay that is optimized for vocal learning, allowing the user's brain to process and respond to the feedback effectively. This preliminary preparation of the signal simplifies the user's task of vocal modulation.
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
Increases user awareness and ability to effectively convey emotion in speech, aiding in therapies for various vocal-related conditions and improving pragmatic aspects of communication.
Implementation Method 1
a microphone directed at the user
Implementation Method 2
a fundamental frequency accentuator coupled to the microphone
Implementation Method 3
a delay circuit coupled to the fundamental frequency accentuator, where the delay circuit is configured to impose a time delay
Implementation Method 4
a speaker coupled to the delay circuit, where the speaker is configured to convert the electrical signal to an audio signal directed at the user
Data Source
AI summary
A vocal feedback device comprising: a microphone; a fundamental frequency accentuator electrically connected to the microphone, a delay circuit electrically connected to the fundamental frequency accentuator, and a speaker electrically connected to the delay circuit. The device configured to convert vocal utterances received at the microphone into an electrical signal, impose a time delay before transmitting the electrical signal, after the time delay, transmit the electrical signal to the speaker, and convert the electrical signal to an audio signal using the speaker, the audio signal being a replication of the vocal utterances.