Hearing Assistive Attachment for Directional and Omnidirectional Modes

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Solution Overview

Problem

Existing hearing assistive devices struggle to adapt between directional and omni-directional sound processing modes effectively, especially when used on different surfaces such as clothing or tables, without manual intervention.

Innovation Solution

A hearing assistive device with an attachment element, like a clip, that automatically switches between directional and omni-directional modes based on its attachment state, using a mechanism that changes electrical conductivity to control signal processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the attachment element is used to grip clothing for directional processing, then the user's voice is enhanced, but the device cannot pick up sound from multiple directions when placed on a table

Engineering Contradiction:

Improveadaptability between directional and omni-directional modesVSAvoidcomplexity of mode switching mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The attachment element serves dual functions: it acts as both a mechanical grip for securing the device to clothing and as a switch mechanism for controlling processing mode. This multi-functionality eliminates the need for separate mode selection controls, allowing the device to automatically adapt between directional and omni-directional modes based on whether the attachment element is gripping conductive or non-conductive material.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system automatically determines the appropriate processing mode based on the electrical conductivity detected through the attachment element, without requiring manual user input. The device self-adjusts its signal processing characteristics according to the detected attachment state, enabling automatic adaptation to different usage scenarios.

Inventive Principle:

Principle #25Self-service

2Ease of operation

If manual mode switching is implemented, then processing mode can be changed, but user intervention is required which reduces convenience

Engineering Contradiction:

Improveease of mode switchingVSAvoidautomatic mode detection

Core Design Contradiction:

Ease of operationVSExtent of automation

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors the electrical conductivity of the attachment element and uses this feedback to automatically adjust the signal processing mode. The feedback loop between conductivity detection and mode selection enables the device to respond dynamically to changes in attachment conditions without user intervention.

Inventive Principle:

Principle #23Feedback

3Reliability

If the attachment element uses conductive material for gripping, then electrical contact can be detected, but it may cause false signals when not properly attached

Engineering Contradiction:

Improvereliability of attachment state detectionVSAvoidfalse conductivity signals

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system uses the electrical conductivity of the attachment element as an intermediary indicator to infer the attachment state. By measuring conductivity through the attachment element, the system can reliably distinguish between properly attached (conductive) and detached or improperly attached (non-conductive) states, reducing false signals.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces mechanical attachment state detection with electrical conductivity measurement. Instead of using mechanical switches or physical position sensors, the system uses the electrical properties of the attachment element to determine attachment state, providing more reliable and contactless detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 device provides improved sound processing by automatically adapting to the user's intended use, enhancing the desired sound while reducing background noise, without requiring manual user input.

Implementation Method 1

a scheme for adjusting signal processing in the hearing assistive device based on the use of the attachment element... monitoring a current flowing through said first and second mutually movable mechanical parts

Methodology Applied

Scientific EffectElectrical Conductivity: Conduction (electrical)

Data Source

PatentUS12439212B2Hearing assistive device comprising an attachment element

Publication Date: 2025.10.07 OTICON

AI summary

A hearing assistive device comprises a multi-microphone system for providing a processed input signal. The multi-microphone system comprises a multitude of microphones for picking up sound from an environment; and a beamformer filter configured to. The hearing assistive device further comprises an attachment element configured to fix the hearing assistive device to the body or clothes of a person. The multi-microphone system is configurable to operate in at least two modes in dependence of a mode control signal, A) a directional mode and B) an omni-directional mode wherein said multi-microphone system is configured to provide said processed input signal as a substantially directional signal, and as a substantially omni-directional signal, respectively. The attachment element is configured to provide an electric signal indicative of a current state of the attachment element. The hearing assistive device further comprises a mode controller for providing said mode control signal in dependence of said electric signal indicative of a current state of the attachment element.