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OpenTest v2.1.0 Beta is now available as the August release. This update adds sensor database management, math-based virtual channels, Zoom FFT, stepped level sweep, trigger-controlled measurement, synchronized measurement across multiple modules, extended post-processing, and enhanced cursor tools to improve acoustic, NVH, and electroacoustic testing workflows. In acoustic, NVH, and electroacoustic testing, engineers often work with [...]
Some fans do not sound very loud, yet they may still feel sharp, buzzing, or annoying over time. Others can run continuously without drawing much attention. This difference is not determined by decibels alone. It is also related to frequency distribution, tonal components, loudness, sharpness, roughness, and fluctuation strength. Using fan noise as an example, [...]
In motor, headphone, speaker, and complete product testing, anomalous sound is often not a simple sound pressure level issue. Many early defects appear as slight rubbing noise, whistling, buzz, anomalous noise, or changes in spectral details. Traditional electroacoustic testing and manual listening inspection are difficult to keep consistent in large-scale testing. Using TWS earbud AI [...]
OpenTest v2.0.0 Beta was released in June. This update introduces Sequence Mode for the first time, adding test workflow orchestration capabilities to OpenTest. Users can now configure steps such as acquisition, analysis, storage, and reporting into repeatable standardized workflows. The new version also improves batch channel parameter setup, project import/export, sound level meter calculation rate [...]
Using a wired headphone acoustic measurement workflow as an example, this article explains how OpenTest connects to an NI USB-4431 DAQ device and supports a complete acoustic test workflow, from test setup, channel configuration, and signal acquisition to frequency response analysis, distortion analysis, report generation, and sequence-based automation. The workflow helps engineering teams upgrade their [...]
OpenTest releases a new version every month, with the goal of ensuring that each update introduces features that truly matter to users while making the software better and faster with every release. OpenTest v1.4.0 Beta is now available, bringing updates across signal generation, hardware compatibility, new algorithms, feature improvements, and a simpler licensing experience: Why [...]
