Speaker System Acoustic Event Detection Modification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gunshot detection systems are costly due to the requirement for installing and wiring geographically spaced sound sensors, making them prohibitive for many areas, especially when existing speaker systems already installed and wired could be repurposed for this purpose.
Innovation Solution
Integrating an acoustic event detection module into existing speaker systems, allowing speakers to function as both sound output devices and sound sensors, which process signals to detect gunshots or other acoustic events, thereby reducing the need for additional sensor installation and wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gunshot detection systems use dedicated sound sensors with separate wiring infrastructure, then detection capability is achieved, but system cost and installation complexity increase significantly
Solution Approach 1:
The speaker devices are made multi-functional by enabling them to perform both their traditional function (playing alarm sounds) and a new function (detecting acoustic events like gunshots). The speaker system can receive alarm signals from the head unit and simultaneously capture acoustic signals for gunshot detection, eliminating the need for separate dedicated sensors and reducing system complexity
Solution Approach 2:
The patent combines the sound output function and sound sensing function into a single integrated system. The speaker devices serve dual purposes: they are driven by the head unit to produce alarm sounds while also capturing ambient acoustic signals for gunshot detection analysis, merging what were previously separate functional components
2Measurement precision
If dedicated sound sensors are installed for gunshot detection, then detection precision is achieved, but system cost increases due to additional wiring and infrastructure
Solution Approach 1:
The existing speaker system serves itself by using its own infrastructure (power wiring, signal cables) to also perform gunshot detection. The same electrical connections that deliver power and audio signals to the speakers are utilized to carry back acoustic detection signals to the head unit, eliminating the need for separate sensor installation and wiring
3Ease of manufacture
If existing speaker systems are repurposed for acoustic event detection, then system cost is reduced, but the speakers must perform dual functions which may affect their primary alarm function
Solution Approach 1:
The speaker system is designed with multi-functionality where the same hardware components handle both alarm sound playback and acoustic event detection. The head unit can selectively drive speakers for alarm output or receive signals from speakers for gunshot detection, allowing the system to adapt between functions as needed without compromising either capability
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
This approach significantly reduces the cost of gunshot detection systems by leveraging existing speaker infrastructure, enabling effective detection of acoustic events like gunshots without the need for new sensor installations, while maintaining the integrity of the wiring through supervision circuits.
Implementation Method 1
an acoustic event detection module structured to receive signals from the speakers and to detect an acoustic event based on the signals received from the speakers
Data Source
AI summary
A speaker system with acoustic event detection, the speaker system including a number of speakers, a head unit including an output circuit structured to output an output signal to the speakers to cause the speakers to output an audible sound, and an acoustic event detection module structured to receive signals from the speakers and to detect an acoustic event based on the signals received from the speakers.