Hearing Probe Temperature Control for Condensation Prevention

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Solution Overview

Problem

Existing hearing testing probes face challenges due to environmental conditions such as humidity and barometric pressure changes, which affect the accuracy of measurements and cause condensation issues, leading to instability in pressure response and potential permanent degradation of transducer performance.

Innovation Solution

Integration of environmental sensors and heating elements within the hearing testing probe to measure and correct for environmental conditions, actively controlling temperature and providing correction data to transducer responses, and indicating changes in barometric pressure to ensure accurate and stable measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hearing testing probes are used in high humidity environments, then the probe can perform hearing tests, but condensation develops on transducer components causing permanent performance degradation

Engineering Contradiction:

Improvetransducer performance stabilityVSAvoidcondensation on transducer

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The heating element is activated before and during the hearing test to preemptively prevent condensation from forming on the transducer. By maintaining the transducer temperature above the dew point, the harmful condensation effect is countered before it can occur, protecting the transducer from permanent degradation.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The temperature of the transducer is actively changed and controlled during the test using the heating element. The system monitors temperature and adjusts heating to maintain optimal conditions, transforming the thermal parameter to prevent phase change of moisture on the transducer surface.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If hearing testing probes are used in varying barometric pressure conditions, then the probe can operate at different altitudes, but pressure response becomes unstable affecting measurement accuracy

Engineering Contradiction:

Improveoperation at different altitudesVSAvoidpressure response stability

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The pressure sensor continuously monitors the barometric pressure conditions inside the ear canal, and this feedback is used by the processor to automatically adjust and compensate for pressure-induced variations in transducer response. This closed-loop correction maintains measurement precision across different altitudes.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the electrical parameters of the transducer response based on measured pressure conditions. By applying correction factors derived from pressure sensor data, the system transforms the transducer output to maintain accuracy despite varying barometric pressure.

Inventive Principle:

Principle #35Parameter changes

3Loss of energy

If the probe remains at ambient temperature in cold environments, then energy consumption is reduced, but condensation forms on the probe causing measurement errors

Engineering Contradiction:

Improveheating energy consumptionVSAvoidacoustic measurement accuracy

Core Design Contradiction:

Loss of energyVSMeasurement precision

Solution Approach 1:

Instead of heating the entire probe housing, the system applies heating only to the specific transducer components that are prone to condensation. This partial heating approach provides sufficient protection against condensation while minimizing overall energy consumption.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system uses the probe's own heating element and temperature sensors to self-regulate and prevent condensation without external intervention. The embedded controller automatically manages the heating based on temperature and humidity conditions, making the system self-sufficient in preventing measurement errors.

Inventive Principle:

Principle #25Self-service

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 solution enhances the accuracy and reliability of hearing tests by compensating for environmental variations, reducing measurement errors, and preventing condensation, thereby maintaining consistent transducer performance across different conditions.

Implementation Method 1

heating element(s) disposed within a body of the hearing test probe and operable to heat the probe

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

environmental sensor(s) coupled to the acoustic channel and configured to measure a temperature, a humidity, and a barometric pressure of the acoustic channel

Methodology Applied

Scientific EffectTemperature measurement:

Data Source

PatentUS9191761B2Hearing testing probe with integrated temperature and humidity sensors and active temperature control

Publication Date: 2015.11.17 INTERACOUSTICS

AI summary

Certain embodiments provide a hearing testing system. The hearing testing system includes a transducer and an environmental sensor coupled with an acoustic channel. The environmental sensor is configured to measure environmental conditions of the acoustic channel. The hearing testing system includes a processor. The processor is configured to receive the environmental conditions from the environmental sensor. The processor is configured to apply, based on the measure environmental conditions, correction data to a transducer response to generate a corrected transducer response. In certain embodiments, the processor is configured to control a heating element based on a measured temperature to maintain a pre-defined temperature, or range of temperatures, at a testing probe.