Dual-Monomer Loudspeaker Module for Vibration Cancellation

Solution Overview

Problem

Existing speaker modules in portable electronic devices generate strong vibration feelings and abnormal noise due to the reaction force of the diaphragm, affecting user experience.

Innovation Solution

The speaker module is designed with two speaker monomers, each with opposite vibration directions, offsetting momentum variations to minimize vibration excitation, and includes a configuration that increases sound loudness and improves sound quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a single speaker monomer is used in the speaker module, then the structure is simple and easy to manufacture, but strong vibration feeling and abnormal noise occur due to reaction force

Engineering Contradiction:

Improvestructure simplicityVSAvoidvibration feeling and abnormal noise

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The speaker module is divided into two independent speaker monomers (first speaker monomer and second speaker monomer) with separate housings and diaphragms. Each speaker monomer can be manufactured independently, maintaining ease of production while enabling opposite vibration directions to cancel reaction forces and reduce abnormal noise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first diaphragm and second diaphragm are configured to vibrate in opposite directions when driven by audio signals. This opposite vibration creates counterbalancing reaction forces that cancel each other out, reducing the overall vibration feeling and abnormal noise generated by the speaker module.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Object-generated harmful factors

If two speaker monomers with opposite vibration directions are used, then vibration excitation is reduced, but device complexity increases

Engineering Contradiction:

Improvevibration excitationVSAvoidspeaker module structure

Core Design Contradiction:

Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The speaker module is divided into two independent speaker monomers (first speaker monomer and second speaker monomer) with separate housings and diaphragms. Each speaker monomer can be manufactured independently, maintaining ease of production while enabling opposite vibration directions to cancel reaction forces and reduce abnormal noise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first housing and second housing are integrated to form a unified speaker module structure. The mounting plate provides a common mounting interface for both speaker monomers, and the rear cavities are connected to form a shared acoustic chamber, reducing overall structural complexity while maintaining the benefits of opposite vibration.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If the first and second housings are separate structures, then assembly flexibility is improved, but the overall structure becomes more complex

Engineering Contradiction:

Improveassembly flexibilityVSAvoidhousing structure

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The speaker module is divided into two independent speaker monomers (first speaker monomer and second speaker monomer) with separate housings and diaphragms. Each speaker monomer can be manufactured independently, maintaining ease of production while enabling opposite vibration directions to cancel reaction forces and reduce abnormal noise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first housing and second housing are integrated to form a unified speaker module structure. The mounting plate provides a common mounting interface for both speaker monomers, and the rear cavities are connected to form a shared acoustic chamber, reducing overall structural complexity while maintaining the benefits of opposite vibration.

Inventive Principle:

Principle #5Merging (Combining)

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

This design reduces vibration excitation and enhances sound quality by offsetting momentum variations, providing a more stable and high-quality audio experience.

Implementation Method 1

a vibration direction of the first diaphragm is opposite to a vibration direction of the second diaphragm, so that momentum variations (mv) Δ of the speaker module can be offset against each other

Methodology Applied

Scientific EffectMomentum conservation: Conservation of Momentum

Data Source

PatentEP4044621B1Loudspeaker module and portable electronic device

Publication Date: 2026.02.25 HUAWEI TECH CO LTD

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AI summary

Embodiments of this application provide a speaker module and a portable electronic device. The speaker module includes a first speaker module and a second speaker module. The first speaker module includes a first housing and a first speaker monomer accommodated in the first housing, and the first speaker monomer has a first diaphragm. The second speaker module includes a second housing and a second speaker monomer accommodated in the second housing, and the second speaker monomer has a second diaphragm. The first speaker module and the second speaker module are sequentially disposed in a vertical direction, and a vibration direction of the first diaphragm is opposite to a vibration direction of the second diaphragm, so that momentum variations (mv) Δ of the speaker module are offset against each other, thereby resolving a problem that a vibration feeling is strong when the speaker module works.