Sound Field Waveform Alignment for Irregular Delay Security Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sound field security systems face challenges in ensuring accurate and stable analysis due to irregular system delays, which can affect the timing of waveform analysis and compromise security.
Innovation Solution
A sound field security system with a sound analyzer that calculates combined values of received waveform amplitudes at peak intervals, selects the time-axis location with the maximum combined value, and determines a starting point for analysis by deducting a specific time set value from this location, allowing for adaptive analysis even with irregular delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sound field security system analyzes data stored during a specific period of time to determine intrusion, then the system can detect intrusions by analyzing temporal relationships of sound pressures, but irregular system delays cause inconsistent and unstable security performance
Solution Approach 1:
The system performs preliminary actions by storing reference waveform data during a calibration period before actual security monitoring begins. This pre-stored reference data serves as a baseline for comparing subsequent received waveforms, enabling the system to compensate for irregular delays by referencing predetermined temporal patterns rather than relying solely on real-time analysis.
Solution Approach 2:
The system changes analysis parameters dynamically by adjusting the time period under analysis based on detected delay patterns. When irregular delays are detected in the received waveform, the system modifies the analysis window and temporal parameters to align with the actual signal arrival patterns, thereby maintaining measurement precision despite varying delay conditions.
2Ease of operation
If the sound receiver is spaced apart from the sound output unit, then the sound receiver receives the sound signal, but time delay occurs in the signal transmission
Solution Approach 1:
The system performs preliminary characterization of the transmission path by storing reference waveform data that captures the expected temporal relationships between sound output and reception. This pre-established reference accounts for the fixed spatial separation between the sound output unit and receiver, allowing the system to compensate for the inherent time delay by comparing received signals against the predetermined reference patterns.
3Adaptability or versatility
If the system analyzes received waveform data with irregular delays, then the system can adapt to system variations, but the starting point for analysis becomes uncertain
Solution Approach 1:
The system employs feedback by continuously comparing the received waveform against the stored reference waveform and detecting delay patterns. Based on this comparison, the system identifies the actual starting point of the received signal by finding the optimal alignment between reference and received data, then uses this detected starting point to adjust subsequent analysis parameters, creating a closed-loop adaptive system.
Solution Approach 2:
The system transitions from static analysis parameters to dynamic adaptation by adjusting the analysis starting point and time window based on detected delay patterns. The system dynamically modifies its analysis configuration for each received waveform based on the specific delay characteristics observed, enabling adaptive precision despite varying transmission conditions.
Data Source
AI summary
Provided is a sound field security system with improved sound field analysis performance, and a method of determining a starting point for analysis of a received waveform by using the same, in which a starting point for analysis of a received waveform may be accurately determined even when there are irregular delays in a system, thereby enabling sound field analysis to be more adaptive to irregular delays that may occur in the system, and ensuring stable sound field security.