Spatial Acoustic Indication for Maritime Obstacle Detection
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Solution Overview
Problem
Current acoustic systems in maritime environments fail to effectively indicate the position of moving obstacles with sufficient precision and clarity, as they rely on simplistic beeps of variable frequency, which are not meaningful for dynamic and directionally moving objects.
Innovation Solution
A device and method utilizing a spatial arrangement of multiple loudspeakers to generate acoustic signals that encode direction and distance information, employing Wave Field Synthesis or Time and Amplitude Panning to create a precise sound field, allowing for the accurate acoustic representation of objects' positions, with adjustable tones and volumes indicating danger levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple loudspeakers are spatially arranged to provide precise directional acoustic information, then measurement precision of object position is improved, but device complexity increases
Solution Approach 1:
The acoustic display system is segmented into multiple independent loudspeakers distributed spatially around the display space. Each loudspeaker can be independently controlled to emit acoustic signals, allowing precise localization of objects by activating specific loudspeakers based on object position and direction.
Solution Approach 2:
The system transitions from simple frequency-based acoustic indication to spatial-dimensional acoustic indication by arranging loudspeakers in three-dimensional space. This adds spatial coordinates (x, y, z positions) as new dimensions for encoding object information, enabling precise directional and positional representation through acoustic signals.
2Loss of information
If acoustic signals provide detailed position information for multiple objects, then information completeness is improved, but cognitive load on operators increases
Solution Approach 1:
Different acoustic signal characteristics are assigned to different spatial regions and object types. Each object receives a customized acoustic signature based on its position, direction, and significance, allowing operators to quickly distinguish between multiple objects through their unique acoustic patterns rather than uniform signals.
Solution Approach 2:
The system varies acoustic signal parameters (frequency, amplitude, timbre) analogous to color changes in visual displays. Different objects are represented by distinct acoustic 'colors' or tonal qualities, enabling operators to rapidly identify and differentiate between multiple objects through auditory perception without overwhelming cognitive processing.
3Loss of information
If acoustic signals are made distinct and varied for different objects, then distinguishability of signals is improved, but signal complexity increases
Solution Approach 1:
The system employs periodic acoustic signaling patterns with varying frequencies, durations, and intervals to represent different objects. By modulating acoustic signals periodically with distinct temporal patterns, the system achieves high signal distinguishability while using systematic, rule-based signal generation that manages processing 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
Enhances safety by providing clear, spatially resolved acoustic cues that can be perceived simultaneously with visual information, reducing the cognitive load on operators and improving situational awareness without overloading them with unnecessary data, while being pleasant enough for sustained use.
Implementation Method 1
employing Wave Field Synthesis or Time and Amplitude Panning to create a precise sound field
Implementation Method 2
employing Wave Field Synthesis or Time and Amplitude Panning to create a precise sound field
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A device (100) for the acoustic indication of a position of an object (200) in a playback room (210), in the reproduction room (210) a plurality of speakers (220) being disposed in spatially different positions such that as a result of the different actuation of the speakers (220) different spatial positions can be acoustically represented, comprises a signal association unit (110) and a speaker actuation unit (120). The signal association unit (110) is configured to associate an acoustic signal with the object (200). The speaker actuation unit (120) is configured to determine one or more speaker signals (LS) for the plurality of speakers (220), wherein the one or more speaker signals (LS) by which the position of the object (200) is indicated are based on the acoustic signals associated with the object (200) by the signal association unit (110). The one or more speaker signals (LS) can be determined in that upon reproduction of the one or more speaker signals (LS) the position of the object (200) is acoustically indicated in the reproduction room (210).