Microphone Tracking System Using Acoustic Localization
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Solution Overview
Problem
Current microphone localization techniques, such as Ultra Wide Band signals and directional microphones, face challenges in accuracy and design complexity, especially in complex environments like multi-floor buildings, and lack efficient communication systems for automatic or operator-managed commands.
Innovation Solution
A tracking and communication system using a reference system with Cartesian axes and wireless technologies like Bluetooth, allowing precise microphone localization with (x, y, z) coordinates, enabling easy design and placement within the microphone, and enabling commands to be sent automatically or manually via electromagnetic signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Ultra Wide Band signals are used for microphone localization, then localization capability is achieved, but antenna design and placement becomes difficult
Solution Approach 1:
The patent replaces the mechanical/electrical antenna system with an acoustic-based localization approach. Instead of using UWB radio signals that require complex antenna design, the system uses acoustic signals and microphone arrays to determine position through time difference of arrival (TDoA) calculations, thereby substituting a complex electromagnetic system with an acoustic field-based system that is easier to implement in portable devices
Solution Approach 2:
The patent introduces acoustic waves as an intermediary medium for localization. Rather than directly using electromagnetic UWB signals that require specialized antennas, the system uses sound waves that naturally propagate through air and can be detected by standard microphones, serving as an intermediary that simplifies the localization process while maintaining precision
2Ease of operation
If directional microphones are used for localization, then position estimation is possible, but accuracy is low
Solution Approach 1:
The patent divides the localization task into multiple independent measurements by using multiple microphones positioned at different locations. Each microphone provides a separate measurement of the acoustic signal arrival time, and these segmented measurements are combined through TDoA calculations to achieve high-precision three-dimensional localization, overcoming the limitations of single directional microphone approaches
Solution Approach 2:
The patent transitions from two-dimensional directional estimation to three-dimensional localization by incorporating vertical dimension measurements. Using multiple microphones at different heights and positions enables the system to calculate elevation angles and achieve accurate 3D positioning (x, y, z coordinates), adding a vertical dimension that significantly improves overall localization accuracy compared to planar directional methods
3Adaptability or versatility
If complex environments like multi-floor buildings are considered, then comprehensive coverage is achieved, but system complexity increases
Solution Approach 1:
The patent creates a universal localization system that functions across diverse environments including single rooms and multi-floor buildings. The acoustic TDoA methodology is environment-agnostic and can adapt to various spatial configurations without requiring specialized hardware or complex recalibration, providing universal coverage from small studios to large multi-level facilities through the same fundamental principles
Solution Approach 2:
The patent extends localization capability from two-dimensional horizontal planes to three-dimensional space by incorporating vertical dimension measurements through strategically positioned microphones at different elevations. This enables the system to handle multi-floor building environments by calculating 3D coordinates (x, y, z) and determining positions across multiple levels, thereby achieving comprehensive environmental coverage without proportionally increasing system complexity
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
Enables reliable and accurate microphone localization and communication in complex environments, allowing for precise sound reproduction and dynamic control of microphone settings based on position, improving recording and playback fidelity and operational efficiency.
Implementation Method 1
each equipped with a radio unit placed within or connected to the microphone 10, which emits and receives radio signals
Data Source
AI summary
A tracking and communication system for microphones (10), comprising a plurality of microphones (10) installed in one or more zones (14) of contiguous or separate environments. Each microphone (10) is equipped with a radio unit which is connected to the microphone (10). The tracking and communication system comprises also a network of radio transceivers (11), which are positioned in said one or more zones (14) and which are connected wirelessly or through one or more cable one to each other, being configured to receive signals from said microphones (10) and to transmit to them a plurality of data, and a command and control unit (12), to which said radio transceivers (11) are connected wirelessly or via cables.