Earphone Test System With Shared Noise Field Source
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Solution Overview
Problem
Conventional earphone testing systems are not well-suited for rapid, large-scale testing in a production environment, requiring trained personnel, significant space, and are inefficient due to the need for careful placement and synchronization of earphone devices on test fixtures to ensure accurate measurement of active noise reduction functionality.
Innovation Solution
An earphone test system with multiple test stations that share a common noise field source, allowing for independent testing of earphone devices, with a transport mechanism to expose each station sequentially or in parallel to a localized or dispersed uniform noise field, enabling high-volume testing in a factory setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional testing systems are used with individual noise field sources for each test station, then measurement precision is maintained, but device complexity and space requirements increase significantly
Solution Approach 1:
The patent merges multiple individual noise field sources into a single common noise field source that serves multiple test stations simultaneously. This reduces the total number of noise sources from N (one per test station) to 1, thereby reducing system complexity while maintaining the ability to provide controlled noise fields for accurate ANR measurements across all test stations.
Solution Approach 2:
The common noise field source is designed to serve multiple test stations with different test configurations and requirements. A single noise source performs the function of multiple individual sources, providing universal service to all test stations while reducing overall system complexity and space requirements.
2Adaptability or versatility
If multiple individual noise field sources are provided for each test station, then each station can operate independently, but space requirements and system cost increase
Solution Approach 1:
Multiple test stations share a common noise field source, merging the noise generation function across all stations. This allows independent operation of each test station while using a single shared resource, thereby reducing the total space required compared to having separate noise sources for each station.
3Measurement precision
If conventional testing procedures are used with careful placement requirements, then measurement accuracy is maintained, but productivity and testing speed decrease
Solution Approach 1:
The system segments the testing process into multiple parallel test stations that can operate simultaneously. Each station is equipped with the necessary interfaces and controls to handle earphone devices independently, allowing multiple devices to be tested at the same time rather than sequentially, thereby increasing overall productivity while maintaining measurement accuracy through consistent testing protocols.
Solution Approach 2:
The test stations are designed with automated interfaces and controls that reduce the need for manual placement and adjustment by trained personnel. The system provides self-service capabilities through automated device handling and testing protocols, increasing testing speed while maintaining accuracy through consistent automated procedures.
4Measurement precision
If trained personnel are used for careful device placement and testing, then measurement accuracy is ensured, but labor costs and operational complexity increase
Solution Approach 1:
The test stations incorporate automated interfaces and guidance systems that enable operators with minimal training to perform accurate measurements. The system provides self-service capabilities through automated device handling, positioning assistance, and testing protocols, reducing dependence on highly trained personnel while maintaining measurement accuracy through consistent automated procedures.
Data Source
AI summary
An earphone test system (20) includes a plurality of test stations (22) each operative to perform a function during testing of an earphone device (12) coupled thereto. During testing of earphone devices (12) coupled to the plurality of test stations (22) the earphone test system (20) is operative to expose each of the plurality of test stations (22) to a noise field generated by a common noise field source (29).