Body Vibration Audio Filtering for Adjustable Bass Immersion

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Solution Overview

Problem

Existing music reproduction systems, such as body vibration headphones and acoustic vibrating rod systems, fail to provide a comprehensive and immersive music experience due to limitations in reproducing deep bass and flexibility in vibration adjustment.

Innovation Solution

A vibration generation system comprising a signal generator and a vibrator device with a variable filter that extracts specific frequency ranges from music signals, allowing for adjustable output and user-defined settings to enhance the music experience through targeted body vibrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a long-stroke speaker is used to reproduce powerful deep bass, then the bass reproduction quality is improved, but the device size increases making it difficult to fit in small earphones and headphones

Engineering Contradiction:

Improvebass reproduction qualityVSAvoiddevice size

Core Design Contradiction:

Manufacturing precisionVSVolume of moving object

Solution Approach 1:

The patent replaces the traditional mechanical speaker system with a bone conduction vibrator that directly transmits vibrations to the skull bones. This substitution eliminates the need for large speaker coils and diaphragms, achieving deep bass reproduction through mechanical vibration transmission to the bone structure rather than through air pressure in a small enclosure.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces bone conduction as an intermediary mechanism between the audio signal and the user's perception. Instead of directly driving air pressure in small earphone drivers, the system uses bone conduction to transmit low-frequency vibrations through the skull, bypassing the need for large acoustic chambers and enabling deep bass in compact form factors.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a fixed-frequency vibrator is used in body vibration headphones, then the device structure is simplified, but the ability to reproduce different music experiences and personal preferences is limited

Engineering Contradiction:

Improvedevice structureVSAvoidmusic experience customization

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements a variable frequency vibrator that can dynamically adjust its operating frequency based on the music signal characteristics and user preferences. This dynamic adjustment capability allows the same device to adapt to different music genres and personal tastes, transforming a static single-frequency vibrator into a versatile multi-frequency system while maintaining relatively simple hardware architecture.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operating frequency parameter of the vibrator to achieve different music reproduction effects. By varying the frequency parameter rather than using multiple fixed-frequency vibrators, the system achieves diverse music experiences and personalized preferences while keeping the device structure simple and cost-effective.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If a vibrating rod system with resonance is used, then the vibration propagation efficiency is improved, but the flexibility in adjusting vibration characteristics for different body areas and preferences is insufficient

Engineering Contradiction:

Improvevibration propagation efficiencyVSAvoidvibration adjustment flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent replaces the fixed resonance frequency system with a dynamically adjustable frequency system. The vibrator can be tuned to match the resonance frequency of different body parts (skull, chest, abdomen) based on real-time user feedback and preferences, enabling efficient vibration propagation to various body areas while providing flexible adjustment capabilities that a fixed resonance system cannot achieve.

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 system enables a more flexible and vivid music experience by allowing users to customize frequency ranges and vibration settings, providing a synergistic effect of sound and vibration that enhances realism and immersion beyond traditional headphones.

Implementation Method 1

a variable filter that extracts a signal of a predefined frequency range from an input music signal

Methodology Applied

Scientific EffectFrequency filtering: Filter (electronic)

Implementation Method 2

a driver that drives the vibrator based on the signal of the frequency range extracted by the variable filter

Methodology Applied

Scientific EffectElectromagnetic actuation: Electromagnetic Induction

Implementation Method 3

a vibrator fitted to a human body for use

Methodology Applied

Scientific EffectMechanical vibration: Vibration

Data Source

PatentEP3742750B1Vibration generation system, signal generation device, and vibratory device

Publication Date: 2022.03.09 JVC KENWOOD CORP

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AI summary

A vibrator 33 is fitted to a human body for use. A variable filter 222 extracts a signal of a predefined frequency range from an input music signal. A driving controller 32 drives the vibrator 33 based on the signal of the frequency range extracted by the variable filter 222. It is possible to adjust the frequency range that is predefined by using a user operation interface 26. The frequency range that is predefined may be determined by a frequency determination interface.