Dual-Mode Loudspeaker Layout for Compact Rotatory Sound Generation

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Solution Overview

Problem

Existing loudspeaker designs that incorporate separate sound generators for translational and rotatory sound components are elaborate and not compact enough, particularly when space is limited, and existing recording formats often lack the rotatory sound field component, leading to a deterioration in audio quality, especially in compressed formats.

Innovation Solution

A loudspeaker design with two sound generators arranged to intersect at an angle between 60° and 120° within a sound chamber, emitting a combined sound field through a gap in the housing, and a signal processor that overlaps common-mode and push-pull signals to generate both translational and rotatory sound components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If separate sound generators for translational and rotatory sound components are used, then audio quality is improved, but device complexity increases and compactness deteriorates

Engineering Contradiction:

Improveaudio qualityVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent combines translational and rotatory sound generation into a single loudspeaker unit with two sound generators (first and second) that share a common housing and acoustic chamber. This merging approach maintains the audio quality benefits of separate sound generators while reducing overall device complexity and improving compactness compared to using entirely separate transducers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Within the single loudspeaker unit, the sound generation function is segmented into two distinct sound generators with different emission directions. The first sound generator emits in a first direction while the second sound generator emits in a second direction, allowing independent control of translational and rotatory sound components while maintaining a compact integrated structure.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If separate sound generators for translational and rotatory sound components are used, then audio quality is improved, but the loudspeaker becomes less compact

Engineering Contradiction:

Improveaudio qualityVSAvoidcompactness

Core Design Contradiction:

Manufacturing precisionVSVolume of moving object

Solution Approach 1:

The patent implements a nested structure where two sound generators are housed within a single loudspeaker housing that contains a shared acoustic chamber. The first and second sound generators are positioned within the same housing structure, with their emission directions intersecting at angles between 60° and 120°, creating a compact integrated unit that maintains high audio quality while minimizing overall volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Adaptability or versatility

If standard recording formats are used without rotatory sound field component, then compatibility is maintained, but audio quality deteriorates

Engineering Contradiction:

ImprovecompatibilityVSAvoidaudio quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The loudspeaker dynamically adapts its operation mode based on the input signal type. When receiving multi-channel signals containing rotatory sound field information, the system activates both translational and rotatory sound generation modes. When receiving standard stereo signals, the system can operate in a simplified mode while maintaining compatibility, thus adapting to different recording formats while optimizing audio quality when rotatory components are available.

Inventive Principle:

Principle #15Dynamics

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

The design achieves a high-quality audio perception with both translational and rotatory sound components, providing a natural and compact loudspeaker solution that enhances audio quality, even in compact designs.

Implementation Method 1

a first sound generator with a first emission direction, and a second sound generator with a second emission direction, wherein the first sound generator and the second sound generator are arranged with respect to each other such that the first emission direction and the second emission direction intersect in a sound chamber

Methodology Applied

Scientific EffectSound wave propagation: Sound

Implementation Method 2

the housing includes a gap configured to enable gas communication between the sound chamber and the surrounding area of the loudspeaker

Methodology Applied

Scientific EffectGas flow through opening:

Data Source

PatentUS12556863B2Loudspeaker, signal processor, method for manufacturing the loudspeaker, or method for operating the signal processor by using dual-mode signal generation with two sound generators

Publication Date: 2026.02.17 KAETEL SYST GMBH

AI summary

A loudspeaker includes a first sound generator with a first emission direction, and a second sound generator with a second emission direction, wherein the first sound generator and the second sound generator are arranged with respect to each other such that the first emission direction and the second emission direction intersect in a sound chamber and comprise an intersection angle that is larger than 60° and smaller than 120°; and a housing that accommodates the first sound generator and the second sound generator and the sound chamber, wherein the housing comprises a gap configured to enable gas communication between the sound chamber and the surrounding area of the loudspeaker.