Modular Wearable Voice Modulator with Feedback Cancellation
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Solution Overview
Problem
Existing voice modulators produce low-quality, low-volume sound outputs, making them unsuitable for commercial or professional use, and they often suffer from short battery life and feedback issues due to power constraints, which disrupt the realism of vocal modulation in cosplay, film, and television productions.
Innovation Solution
A wearable, modular sound modulation system with a high-power amplifier, a programmable sound modulation controller, and a rechargeable battery system integrated into a vest, featuring multiple pockets for modular components, including speakers and a microphone, designed to eliminate feedback and provide easy battery replacement, with wireless connectivity for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If higher power amplifier is used to improve sound quality and volume, then power consumption increases requiring larger, heavier, hotter batteries
Solution Approach 1:
The system divides the power supply into multiple separate battery units that can be independently managed and replaced. Each battery unit connects to the amplifier through a power distribution circuit, allowing individual batteries to be swapped without replacing the entire power system. This segmentation enables continuous operation and reduces the burden of carrying a single large heavy battery.
Solution Approach 2:
The amplifier is designed with adjustable power output parameters that can be dynamically changed based on operational needs. The system includes control circuits that can modify the amplifier's power consumption characteristics, allowing it to operate at lower power levels during normal use and switch to higher power levels only when needed, thereby reducing overall energy consumption.
2Ease of operation
If speaker is placed near the mouth for real-time modulation effect, then feedback occurs through the microphone
Solution Approach 1:
The system incorporates a feedback detection and cancellation circuit that continuously monitors the audio signal path. When feedback is detected, the circuit generates an anti-phase signal to cancel the feedback loop, allowing the speaker to be positioned close to the mouth without creating audible feedback. The system uses the microphone signal to detect feedback conditions and automatically adjusts the speaker output accordingly.
Solution Approach 2:
A signal processing intermediary circuit is introduced between the amplifier and speaker that analyzes the audio signal in real-time. This intermediary detects feedback conditions and modifies the speaker output signal to prevent feedback while maintaining the real-time modulation effect. The circuit acts as a mediator that reconciles the conflicting requirements of close speaker placement and feedback elimination.
3Adaptability or versatility
If battery-operated portable design is used, then frequent battery changes are required disrupting the illusion
Solution Approach 1:
The power system is segmented into multiple replaceable battery units with standardized connectors. When one battery is depleted, users can quickly swap it with a pre-charged battery unit without disassembling the device or losing operational continuity. The modular battery design with quick-connect interfaces reduces replacement time to seconds, maintaining the illusion during performance.
Solution Approach 2:
The system includes multiple battery units that are pre-charged and ready for immediate use. Users prepare backup batteries in advance, allowing for seamless replacement during performance without interruption. The pre-charged batteries are stored in designated compartments with quick-access mechanisms, enabling rapid exchange before the illusion is disrupted.
4Power
If common low-power amplifier is used, then sound quality and volume are insufficient for professional use
Solution Approach 1:
The system combines the high-power amplifier with the voice modulation processor into a single integrated unit. The amplifier and modulation circuitry share common components such as the power supply, control interfaces, and housing, reducing overall system complexity despite the increased power capability. This integration eliminates the need for separate amplifier and modulator devices, simplifying the user experience while delivering professional-grade sound output.
Data Source
AI summary
A modular sound modulation system that may be incorporated into a wearable harness for use beneath a costume or clothing. The system includes a sound modulation unit having an amplifier and programmable sound modulation controller. Power is provided via a wired remote power supply. Speakers are disposed at key locations to cause modulated sound to appear to come from the head of the costume. A high-fidelity microphone captured vocalizations from the wearer. The system may further include a transmitted to broadcast or store a recording of the modulated sound.