Speaker Sound Pipeline Layout for 3-4 kHz Resonance Control

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Solution Overview

Problem

The resonant frequency generated by the internal shape of the pipeline in electronic devices causes increased noise sensitivity in the 3 to 4 kHz band during calls, leading to enhanced sound pressure and noise perception.

Innovation Solution

The electronic device incorporates a pipeline structure with specific arrangements of structures, such as the first and second structures forming acute angles, to reduce the cross-sectional area and shift the resonance frequency away from the sensitive audible band.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the pipeline width is reduced to decrease internal volume, then the resonant frequency shifts away from the sensitive band, but the damping effect decreases causing sound pressure to increase

Engineering Contradiction:

Improvenoise perceptionVSAvoidsound pressure

Core Design Contradiction:

Object-affected harmful factorsVSStress or pressure

Solution Approach 1:

The patent introduces a damping structure at specific locations within the pipeline rather than uniformly treating the entire pipeline. The damping structure is placed at the distal end of the sound radiation part, creating localized sound absorption exactly where needed to reduce sound pressure in the sensitive frequency band without requiring overall pipeline volume reduction.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The damping structure acts as an intermediary element between the sound wave and the pipeline wall. It mediates the interaction by absorbing sound energy through friction and conversion to heat, thereby reducing sound pressure and noise perception without directly modifying the pipeline's geometric dimensions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If the pipeline internal volume is decreased to shift resonant frequency, then the resonant frequency moves away from 3-4 kHz band, but the damping effect is reduced leading to increased sound pressure

Engineering Contradiction:

Improveinternal volumeVSAvoidnoise sensitivity

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

Instead of uniformly reducing pipeline volume, the patent applies damping material locally at the distal end of the sound radiation part. This localized treatment provides effective noise reduction in the sensitive 3-4 kHz band while preserving the overall pipeline volume and its resonant frequency characteristics.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the physical parameter of the damping structure (such as thickness, material density, or porosity) to optimize sound absorption in the specific frequency band. By adjusting these parameters, the system achieves effective noise reduction without requiring significant changes to pipeline volume or geometry.

Inventive Principle:

Principle #35Parameter changes

3Shape

If the pipeline width is reduced, then the resonant frequency shifts due to decreased internal volume, but sound pressure increases due to decreased damping effect

Engineering Contradiction:

Improvepipeline cross-sectional areaVSAvoidsound pressure

Core Design Contradiction:

ShapeVSStress or pressure

Solution Approach 1:

The damping structure is positioned specifically at the distal end of the sound radiation part where sound pressure is highest. This localized placement provides targeted sound pressure reduction without requiring overall pipeline dimension reduction, maintaining both compact shape and low sound pressure.

Inventive Principle:

Principle #3Local quality

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 arrangement decreases sound pressure in the 2 to 5 kHz band, reducing the amount of noise heard during calls by users.

Implementation Method 1

A resonant frequency may be generated according to an internal shape of a pipeline corresponding to a path through which sound propagates

Methodology Applied

Scientific EffectResonance: Resonance

Implementation Method 2

due to a decrease of a damping effect, sound pressure may increase compared to the existing pressure

Methodology Applied

Scientific EffectDamping: Damping

Data Source

PatentUS12501204B2Electronic device including pipeline structure through which sound propagates

Publication Date: 2025.12.16 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a housing including a front plate, a rear plate disposed to be spaced a predetermined distance apart from the front plate in parallel, and a side plate surrounding a space formed between the front plate and the rear plate, an opening disposed between an upper edge of the front plate and the side plate, a speaker including a sound radiation part in a direction of being directed toward the front plate and disposed inside the housing, a support member disposed to extend from the sound radiation part toward the upper edge of the front plate, and a pipeline including a space formed between the front plate and the support member. The pipeline may include a first structure disposed adjacent to the sound radiation part and a second structure disposed adjacent to the opening, and the second structure may be disposed to be spaced a predetermined length apart from the first structure in a direction of forming an acute angle with respect to a reference line orthogonal to the upper edge.