Audio Distortion Detection Device for Amplifier Gain Control
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Solution Overview
Problem
Existing methods for reducing harmonic distortion in audio signals, such as using oscilloscopes, require specialized training and are often non-portable and expensive, leading to potential human error and inefficiency in setting amplifier gain control.
Innovation Solution
A handheld audio signal distortion detection device with a housing, status indicators, a scaling circuit, and processing unit that detects four audio frequencies and compares DC levels to determine harmonic distortion, illuminating a distortion indicator to simplify gain control adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an oscilloscope is used to adjust amplifier input sensitivity, then measurement capability is improved, but device complexity and ease of operation deteriorate due to requiring specialized training and proper waveform interpretation
Solution Approach 1:
The patent introduces an intermediary device between the audio amplifier and the technician - a distortion detection device that converts complex oscilloscope waveform analysis into simple visual indicators. The device includes a test signal generator, amplifier under test, and distortion indicator that automatically analyzes harmonics and provides clear visual feedback, eliminating the need for technicians to interpret oscilloscope waveforms directly
Solution Approach 2:
The patent replaces the manual mechanical process of oscilloscope operation and waveform interpretation with an automated electronic system. The distortion detection device automatically generates test signals, amplifies them through the amplifier under test, filters harmonics, and provides visual indication of distortion levels, substituting the complex mechanical oscilloscope system with a simplified electronic measurement system
2Measurement precision
If an oscilloscope is used for distortion detection, then measurement capability is improved, but portability and cost deteriorate
Solution Approach 1:
The patent segments the distortion detection function from the bulky oscilloscope system into a standalone portable device. The distortion detection device is designed as a self-contained unit with integrated test signal generator, signal processing circuits, and visual indicators, separating the measurement function from general-purpose expensive equipment
Solution Approach 2:
The patent creates a dedicated portable distortion detection device that is more affordable and practical for routine use compared to expensive oscilloscopes. The device is designed for specific distortion measurement tasks rather than general-purpose use, making it more cost-effective for the intended application
3Measurement precision
If traditional distortion detection methods are used, then measurement accuracy is improved, but productivity deteriorates due to time-consuming adjustments
Solution Approach 1:
The distortion detection device performs self-service by automatically generating test signals, analyzing the output for harmonic distortion, and providing visual feedback without requiring continuous technician intervention. The device autonomously completes the measurement process and guides the technician through gain control adjustments using clear visual indicators
Solution Approach 2:
The patent implements immediate visual feedback through distortion indicators that clearly show when harmonic distortion is present or absent. This real-time feedback allows technicians to quickly adjust amplifier gain control and immediately see the effect, dramatically reducing the time required for proper setup compared to traditional methods
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
Significantly reduces the effort required to set amplifier gain control by providing a user-friendly, portable solution for detecting harmonic distortion, ensuring accurate audio signal reproduction with reduced harmonics.
Implementation Method 1
detect four audio frequencies and compare DC levels of the frequencies to each other to determine if harmonic distortion is present
Data Source
AI summary
An audio signal distortion detection device for simplifying the detection of harmonic distortion to aid in setting an amplifier's gain control to match an audio source unit's output voltage. The audio signal distortion detection device generally includes a housing having a plurality of status indicators thereon for indicating the status of an audio signal being fed into the housing's audio input. By utilizing a scaling circuit and processing unit, the present invention may be configured to detect four audio frequencies and compare DC levels of the frequencies to each other to determine if harmonic distortion is present. A distortion illuminator will illuminate when such distortion is detected and thus significantly reduce the effort required to setting an amplifier's gain control.