Portable Hearing Device Test System with Acoustic Calibration Cavity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hearing aid calibration systems are cumbersome, costly, and complex, making them unsuitable for non-expert users in home or non-clinical settings, as they require specialized instruments and professional intervention.
Innovation Solution
A portable hearing device test system with a built-in acoustic calibration cavity and processor that allows users to perform self-calibration by comparing calibration signals with reference levels, eliminating the need for costly and complex equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional hearing aid analyzers are used, then calibration accuracy is maintained, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts only the essential calibration function from complex conventional hearing aid analyzers. The portable test unit includes minimal necessary components: a test microphone, acoustic calibration cavity, and processor, eliminating unnecessary features while maintaining calibration accuracy through selective extraction of core functionality.
Solution Approach 2:
The patent creates a simplified copy of the calibration function that replicates essential measurement capabilities without copying the full complexity of conventional analyzers. The portable test unit copies only the critical calibration pathway, using a test microphone and acoustic cavity to reproduce necessary measurement functions in a compact form.
2Measurement precision
If conventional hearing aid analyzers are used, then calibration validation is achieved, but manufacturing cost increases
Solution Approach 1:
The patent employs cost-effective components that can be manufactured affordably, including a simple acoustic calibration cavity and basic test microphone. These components are designed to be inexpensive enough for consumer-level devices while maintaining sufficient calibration validation capability, replacing expensive conventional analyzer components.
Solution Approach 2:
The patent creates an affordable replication of calibration validation functionality using simplified hardware and software implementation. The portable test unit copies the essential validation function without requiring expensive specialized equipment, achieving cost reduction through functional replication with budget-friendly components.
3Object-affected harmful factors
If large insulated boxes and standardized acoustic couplers are used, then acoustic isolation is maintained, but device size and cost increase
Solution Approach 1:
The patent extracts only the essential acoustic isolation function from large insulated boxes and standardized couplers. The acoustic calibration cavity provides minimal necessary isolation for calibration frequencies, eliminating excessive insulation material and large physical dimensions while maintaining sufficient acoustic separation for accurate measurement.
Solution Approach 2:
The patent applies acoustic isolation properties locally rather than globally throughout the entire device. The acoustic calibration cavity provides targeted acoustic separation only where needed for the test microphone and calibration signals, rather than insulating the entire device, reducing overall size while maintaining necessary isolation at the measurement point.
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
Enables non-expert users to easily and affordably validate the calibration of their hearing devices at home, reducing the need for professional intervention and costly equipment, while ensuring accurate calibration within a reference range.
Implementation Method 1
The test microphone may be configured to produce a calibration signal input responsive to acoustic calibration stimuli provided by the speaker
Implementation Method 2
The portable test unit may include a coupler at an opening to the acoustic calibration cavity. The coupler may be configured to receive the hearing device or an acoustic adapter at least partially therein
Data Source
AI summary
A hearing device test system for use by a non-expert user may include a hearing device comprising a sound processor and a speaker and a portable test unit including a test microphone acoustically coupled to an exterior of the portable test unit via an acoustic calibration cavity. The portable test unit may include a coupler at an opening to the acoustic calibration cavity configured to receive the hearing device at least partially therein and the test microphone may be configured to produce a calibration signal input responsive to acoustic calibration stimuli provided by the speaker of the hearing device. The hearing device test system may also include a processor associated therewith and configured to measure a level of the calibration signal input.