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Testing returned and second-hand headphones requires balancing efficiency and quality while quickly screening for playback issues, microphone faults, channel imbalance, and unwanted mechanical noise. Compared with relying solely on listening tests, objective electroacoustic testing provides a more consistent and traceable basis for assessment. This article covers the key test items, the differences between functional and [...]
Anomalous Sound EoL Testing helps robot manufacturers identify actuator defects before final assembly or shipment. This article explains the limits of manual inspection and presents CRYSOUND's automated Sound and Vibration testing workflow, system architecture, use cases, and production-line integration options for finger motors, joint modules, and reducers. Why Anomalous Sound Detection Matters in Volume Production [...]
Learn how CRYSOUND combines AI listening, acoustic fixtures, OpenTest software, and production data for headphone defect detection at end of line.
When selecting a data acquisition system for acoustics, NVH, and vibration testing, it is not enough to compare sampling rate, ADC resolution, or channel count alone. The evaluation should also consider field deployment, synchronization, power supply, data storage, analysis workflow, and report delivery. This article compares the application boundaries of SonoDAQ + OpenTest and NI [...]
When evaluating the noise of an appliance, a single sound level meter reading only indicates how loud the sound is at one specific measurement location. It does not directly represent the inherent noise emitted by the product itself. This article begins by explaining the difference between sound pressure level and sound power level, clarifying why [...]
The key to a multi-device data acquisition system is not simply the number of channels, but whether all acquired data share the same time base. In applications such as acoustic arrays, sound source localization, NVH analysis, and distributed vibration testing, even a small timing offset can affect phase relationships, time-of-arrival differences, and source localization accuracy. [...]
Wind tunnels were originally built to see the flow. Within a controlled test section, engineers direct airflow at a specified velocity over vehicles, wings, UAVs, rotor blades, or scale models. By analyzing pressure distributions, aerodynamic forces and moments, smoke visualization, Particle Image Velocimetry (PIV), and balance measurements, they can determine whether flow separation occurs, drag [...]
In today's rapidly evolving electroacoustic product landscape, production line testing systems are no longer expected to simply "produce measurements." They must balance test capability, throughput, stability, and scalability. Core metrics such as frequency response, distortion, and sweep analysis remain essential. At the same time, more advanced requirements, such as anomalous sound detection, multi-channel synchronization, automated [...]
A practical, repeatable workflow for production and lab teams-covering calibration, RF measurements, pass/fail limits, and automated reporting. Frequency Calibration and Bluetooth Performance Testing Test System: QuickRadio + MT8852B Bluetooth Tester QuickRadio provides a powerful platform that can test RF front-end interactions. QuickRadio supports multiple preconfigured sequence templates, making it easy to customize RF test workflows [...]
The audio quality of Bluetooth products is critical, yet traditional manual testing is inefficient and inconsistent. To address this, we leverage the secondary development capabilities of the CRY578 to deliver an efficient, programmable, and automated testing solution. Core Tool: CRY578 Interface Overview The CRY578 is a hardware interface specifically designed for audio testing. It functions [...]
During pilot production and production line ramp-up, many issues do not appear in the way teams initially expect. Sometimes it starts with a small fluctuation at a test station, or a comment from a line engineer saying, "This result looks a bit unusual."However, when takt time, yield targets, and delivery milestones are all under pressure, [...]
In our previous blog post, Anomalous Sound Detection: From Human Ears to AI"we discussed the key pain points of manual listening, introduced CRYSOUND's AI-based anomalous sound testing solution, outlined the training approach at a high level, and showed how the system can be deployed on a TWS production line. In this post, we take the [...]
