Headphone Earpiece Orientation Detection via Differential Ear Temperature

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Solution Overview

Problem

Existing electronic audio devices struggle to accurately determine the location and orientation of speaker elements in headphone sets relative to a user's ears, leading to potential misalignment of audio channels and increased power consumption.

Innovation Solution

The implementation of temperature sensors to detect differential ear temperatures, allowing the device to determine the correct orientation of speaker elements and adjust the audio output accordingly, enabling correct channel alignment and reducing power usage by disabling unused speaker elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If speaker elements are integrated into headphone sets without orientation detection, then device complexity is reduced, but audio channel alignment accuracy deteriorates

Engineering Contradiction:

Improveheadphone structureVSAvoidspeaker element location detection

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The headphone set performs self-detection of its orientation and location relative to the user's ears using temperature sensors. The system automatically determines whether speaker elements are positioned near the right or left ear based on temperature differential measurements, eliminating the need for manual configuration or complex mechanical orientation markers.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical or visual orientation detection methods with a thermal field-based detection system. Temperature sensors measure the temperature differential between left and right ears to determine speaker element location, substituting mechanical complexity with thermal sensing and computational analysis.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If temperature sensors are added to detect ear orientation, then speaker element location detection accuracy is improved, but device complexity increases

Engineering Contradiction:

Improvespeaker element location detectionVSAvoidsensor system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The temperature sensors serve multiple functions: they detect ear orientation, determine speaker element location, and can potentially monitor user physiological states. This multi-functionality justifies the addition of sensing components by providing several benefits from a single sensor system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system utilizes changes in temperature parameters detected by the sensors to determine speaker element orientation. By monitoring temperature differential changes between left and right ears, the system can dynamically adjust audio channel assignment based on the detected thermal pattern.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If audio channels are not dynamically adjusted based on speaker orientation, then device complexity is reduced, but audio output accuracy deteriorates

Engineering Contradiction:

Improveaudio processing systemVSAvoidaudio channel alignment

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system implements a feedback loop where temperature sensor data continuously informs audio channel assignment decisions. The detected ear orientation feeds back to the audio processing system, which automatically adjusts channel mapping to ensure correct stereo imaging regardless of how the headphones are positioned on the user's head.

Inventive Principle:

Principle #23Feedback

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 solution ensures accurate audio perception regardless of speaker element orientation, simplifies device usage and manufacturing, and reduces power consumption by enabling intelligent audio output management.

Implementation Method 1

detect differential ear temperatures, allowing the device to determine the correct orientation of speaker elements

Methodology Applied

Scientific EffectDifferential temperature detection:

Data Source

PatentUS9538302B2Detecting headphone earpiece location and orientation based on differential user ear temperature

Publication Date: 2017.01.03 TURGUL GENYA G

AI summary

Techniques for determining whether a speaker element, or “earpiece,” of an earphone or headphone set is located within, or proximate to, a right ear, a left ear, or neither ear of a user of the set may include receiving a first temperature value from a first temperature sensor, receiving a second temperature value from a second temperature sensor, and determining whether the speaker element is located within, or proximate to, the right ear, left ear, or neither ear, based on (e.g., a difference between) the first and second temperature values. The techniques may further include receiving a third temperature value from a third temperature sensor, such as an user ambient temperature sensor, or a user body temperature sensor, and further determining whether the speaker element is located within, or proximate to, the right ear, left ear, or neither ear, based on the third temperature value.