Vehicle Acoustic Spatial Adjustment System for Zone Sound Focusing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing acoustic systems in vehicles struggle to focus sound on specific zones without changing speaker positions, failing to control sound output effectively in environments with various sound sources and reflections.
Innovation Solution
An acoustic spatial adjustment system using a wireless communication module, adjustment controller, amplifier, and multiple speakers to filter and amplify sound signals, allowing sound to be focused on specific zones (bright zones) while minimizing sound in other areas (dark zones) using filter coefficients that maximize acoustic energy ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sound control methods are used to focus sound on specific zones, then sound directionality is improved, but the method requires changing speaker positions or using restricted sound source arrays which reduces adaptability to existing vehicle environments
Solution Approach 1:
The patent changes the parameters of the sound sources by adjusting the magnitude and time delay of signals input to each speaker, rather than physically moving speakers or changing their arrangement. This allows sound focusing on specific zones while adapting to existing fixed speaker configurations in vehicles.
Solution Approach 2:
The system dynamically adjusts the magnitude and time delay parameters of sound signals in real-time based on the desired focusing zone, enabling flexible sound control without physical reconfiguration of the speaker array.
2Measurement precision
If multiple sound sources are used to control sound zones, then sound focusing capability is improved, but the system complexity increases due to the need for multiple speakers and control mechanisms
Solution Approach 1:
The patent makes existing vehicle speakers perform multiple functions: their original audio output function and the additional function of focused sound control. By adjusting signal parameters, the same speakers can focus sound on different zones for different applications (music, calls, alarms), reducing the need for additional dedicated hardware.
Solution Approach 2:
The system uses the existing speaker infrastructure already present in vehicles to achieve sound focusing, rather than requiring a completely new dedicated hardware system. The existing speakers serve themselves by being controlled through parameter adjustments.
3Productivity
If sound signals are processed to focus on specific zones, then sound management capability is improved, but the processing complexity and computational requirements increase
Solution Approach 1:
The system pre-calculates or pre-determines the optimal magnitude and time delay parameters for different focusing zones, storing them for quick retrieval and application. This preliminary preparation reduces real-time processing complexity when sound focusing is actually needed.
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 sound to be precisely controlled and focused on specific zones within a vehicle using existing or additional speakers, allowing users to select sound focusing, improving sound management and user experience.
Implementation Method 1
an adjustment controller which filters the audio signal in order to generate a sound source signal for focusing the audio signal on the bright zone (BZ) corresponding to the user's input
Data Source
AI summary
An acoustic spatial adjustment system may be provided that includes: a wireless communication module which receives a voice signal from a mobile terminal connected thereto by wireless communication; an adjustment controller which filters the voice signal in order to generate a sound source signal for focusing an output of the voice signal transmitted from the wireless communication module on a bright zone (BZ); an amplifier which divides the sound source signal transmitted from the adjustment controller into multi-channels and amplifies; and a plurality of speakers which output the sound source signal transmitted from the amplifier. As a result, the sound can be focused on a specific zone in the vehicle by using existing mounted speakers in the vehicle or by installing only additional speakers for performance improvement. Also, the individually distinguished sound (audio signal of a stereo system, CD, DVD, etc., a telephone voice signal connected by Bluetooth, etc.) can be adjusted to be heard only in a specific zone (bright zone) and can be adjusted to be heard very small or not to be heard in a zone (dark zone) other than the specific zone. Also, the user is able to select or adjust the sound focusing in the vehicle.