Frequency-Segmented Loudspeaker Transducers for 3D Sound Dispersion

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Solution Overview

Problem

Conventional speaker systems fail to provide true spherical sound dispersion and enrich sound reproduction in varying acoustic environments, neglecting the impact of the listening environment on playback and failing to deliver three-dimensional audio cues.

Innovation Solution

A method involving the generation of audio sub-signals representing specific frequency intervals, each fed to multiple loudspeaker transducers positioned in different directions, with electrical sub-signals dynamically altering over time to simulate spatial cues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional speaker systems use stationary loudspeaker transducers to output audio signals, then the system structure is simple and stable, but the sound dispersion is limited to fixed directions and cannot provide true spherical sound distribution

Engineering Contradiction:

Improvesound dispersion capabilityVSAvoidspeaker system structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the dynamics principle by making the loudspeaker transducers movable rather than stationary. The transducers are positioned on a spherical surface and can be dynamically adjusted to different locations and orientations, enabling the system to adapt sound dispersion patterns to various listening environments and positions, thereby achieving true spherical sound distribution

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent divides the audio signal into multiple frequency bands and assigns different movable loudspeaker transducers to different frequency ranges. This segmentation allows each transducer to be optimized for specific frequency output while collectively providing comprehensive spherical sound coverage, resolving the contradiction between system complexity and sound dispersion capability

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If conventional surround sound systems use multiple fixed loudspeaker transducers arranged at front, sides and back, then the system can enrich sound fidelity and depth, but the sound field remains stable and ignores the listening environment's effect on playback

Engineering Contradiction:

Improveenvironmental adaptabilityVSAvoidnumber of loudspeaker transducers

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system dynamically adjusts the position and orientation of loudspeaker transducers based on the listening environment and user position, rather than maintaining a fixed arrangement. This allows the sound field to adapt to different acoustic spaces and user movements, eliminating the need for multiple permanently positioned transducers while maintaining environmental adaptability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The movable loudspeaker transducers can be repositioned to serve multiple functions and configurations depending on the listening environment. A single transducer can be moved to different locations to fulfill various spatial audio requirements, making the system universally adaptable to different environments without requiring a large number of dedicated transducers for each position

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If omni-directional speaker systems use drivers radiating upwards into curved or conical reflectors, then the system can disperse sound radially, but the sound dispersion is limited to the vertical plane and cannot achieve true spherical distribution

Engineering Contradiction:

Improvespatial sound distributionVSAvoidreflector structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Instead of using fixed curved or conical reflectors that are limited to vertical plane dispersion, the patent employs movable loudspeaker transducers that can be dynamically positioned in three-dimensional space. This allows sound to be dispersed uniformly in all directions (360 degrees horizontally and vertically), achieving true spherical sound distribution without relying on complex static reflector geometries

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent extracts the sound radiation function from the complex curved or conical reflector structures and transfers it directly to movable loudspeaker transducers. By removing the reflector components and using independently controllable transducers positioned on a spherical surface, the system achieves simpler structure while maintaining or improving spatial sound distribution capability

Inventive Principle:

Principle #2Taking out (Extraction)

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 three-dimensional audio reproduction adaptable to varying acoustic spaces, providing enhanced sound localization and immersion across multiple listening positions.

Implementation Method 1

providing a speaker comprising a plurality of sound output drivers or loudspeaker transducers each capable of outputting sound in at least the interval of 100-8000 Hz

Methodology Applied

Scientific EffectElectroacoustic transduction:

Data Source

PatentUS12368996B2Method of outputting sound and a loudspeaker

Publication Date: 2025.07.22 CLANG

AI summary

A method of converting an audio signal into signals for a number of loudspeaker transducers, where the audio signal is divided up into audio sub signals each representing a particular frequency interval, and where the signal for each loudspeaker transducer comprises a portion of each audio sub signal which varies over time.