Dual-Microphone Noise Reduction for Anti-Barking Control
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Solution Overview
Problem
Existing anti-barking devices struggle with low success rates in sound detection, high false triggering, and high manufacturing costs, often failing to accurately distinguish between a pet's barking and nearby dogs, leading to unnecessary activation.
Innovation Solution
An apparatus with a dual microphone system and differential amplifier for noise reduction, combined with a microprocessor for frequency analysis and motion sensing, accurately identifies pet barking through phase cancellation and fast Fourier transform, and includes a wearing detection module to prevent false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional volume and sound frequency detection is used, then the device can detect barking sounds, but it has low detection success rate and high false triggering probability
Solution Approach 1:
The sound detection function is segmented into multiple independent modules: main microphone sound collection module, auxiliary microphone sound collection module, differential amplifier module, and FFT module. Each module performs a specific function in the detection chain, allowing for more precise and reliable barking detection through coordinated operation of these segmented components
Solution Approach 2:
The differential amplifier module acts as an intermediary between the microphone sound collection and FFT analysis. It performs noise reduction by amplifying the difference between the two microphone signals, effectively eliminating environmental noise before the signal reaches the FFT module for frequency analysis, thus improving both detection accuracy and reducing false triggers
2Measurement precision
If dual microphone system with differential amplifier is used, then noise reduction is achieved, but device complexity increases
Solution Approach 1:
The main microphone and auxiliary microphone are merged into a single housing unit worn by the pet, with their signals combined and processed together through the differential amplifier. This merging approach allows noise reduction functionality to be integrated into a compact wearable device, managing complexity while maintaining precision
Solution Approach 2:
The patent introduces a spatial dimension to sound detection by placing microphones at different positions (main microphone near the throat, auxiliary microphone at the top of the housing). This spatial arrangement creates a three-dimensional sound collection system that, when processed through differential amplification, enhances barking detection accuracy while managing system complexity through geometric configuration
3Reliability
If motion sensor and sound-based detection start module are added, then false triggering is reduced, but manufacturing cost increases
Solution Approach 1:
The motion sensor performs preliminary detection of pet movement before the sound detection is fully activated. The sound-based detection start module uses this motion information to determine whether to proceed with sound analysis, preliminarily filtering out cases where the pet is not barking (e.g., when the device is merely moving or being worn), thus reducing false triggers while managing cost through selective activation
Solution Approach 2:
The motion sensor provides feedback about pet movement state to the sound-based detection start module, which then adjusts the sound detection process accordingly. This feedback mechanism allows the system to intelligently determine when barking is likely occurring based on correlated motion patterns, reducing false triggers without requiring expensive complex algorithms
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
The apparatus achieves accurate barking recognition with reduced false operations, low manufacturing costs, and efficient power management, ensuring the device only activates when correctly worn by the pet.
Implementation Method 1
The differential amplifier module filters out environmental noise by using an inverted sound wave based on phase cancellation
Implementation Method 2
The microprocessor performs fast Fourier transform to calculate frequency-domain characteristics
Data Source
AI summary
The present disclosure relates to the technical field of anti-barking devices, and provides an apparatus and method for controlling an anti-barking device with noise reduction. The apparatus includes a fixing device wearable on a neck of a pet dog, a housing, an anti-barking device, a main microphone sound collection module, an auxiliary microphone sound collection module, a differential amplifier module, a microprocessor, a sound-based detection start module and a motion sensor. The present disclosure solves the problem of high false triggering rate in existing anti-barking devices.