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Industrial inspections often involve distant pipework, crowded equipment rooms, and background noise that makes weak signals difficult to isolate. The updated CRYSOUND CRY8120 Series extends the specified test distance to 240 meters and combines a wider camera view, automatic frequency selection, and remote control to make everyday inspections more practical. Finding an acoustic anomaly is [...]
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 [...]
Precision measurement is only as trustworthy as the tools behind it. At CRYSOUND, long-term reliability has always been part of how we support professional acoustic testing and metrology work-especially for equipment expected to perform consistently over many years. That's why CRYSOUND provides a 10-Year Limited Warranty for eligibleCRY3000 series sensors offering long-horizon confidence for labs, [...]
How long does sound linger in a room after the source stops? Reverberation time describes this decay and helps engineers understand the acoustic characteristics of a test space. Using OpenTest's RT60 function, this article covers channel setup, evaluation ranges, background-noise measurement, and the measurement workflow, then explains how to review decay curves and frequency-band results. [...]
Data centers operate around the clock, with cooling systems, transformers and backup generators generating continuous noise, including low-frequency hum. As facilities expand closer to residential areas, noise assessment is becoming increasingly important. This article explores local noise regulations, low-frequency measurement methods and practical solutions using CRY2833 and CRY2851. Why Data Center Noise Requires a Site-Specific [...]
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 [...]
The dynamic range of a measurement microphone describes the span of sound pressure levels it can measure effectively, from weak sounds near the noise floor to high levels near the distortion or overload limit. In practice, the usable range depends on the microphone, preamplifier, data acquisition system, and test environment. Understanding Measurement Microphone Dynamic Range [...]
Not every sound is easy to record. Common sources such as speech and machinery are usually within the capabilities of general-purpose measurement microphones. When the target drops to the level of insect activity, product standby noise, or precision equipment operation, however, the measurement system's own noise can become a limiting factor. In this case study, [...]
Measurement microphone sensitivity is usually expressed in mV/Pa. It describes the voltage a microphone produces for a given sound-pressure input. Sensitivity affects weak-signal output, sound-pressure conversion, and how the microphone matches the rest of the measurement chain, but a higher value is not automatically better. Understanding Measurement Microphone Sensitivity Microphone sensitivity describes the ability of [...]
Organized by the Acoustical Society of China and sponsored by CRYSOUND, the final round of Challenge One at the 4th Shenghua Cup Acoustic Technology Competition concluded at CRYSOUND's Hangzhou headquarters on September 22-23, 2026. The event brought together students, faculty advisors, and acoustics experts for outdoor testing, technical presentations, and industry exchange. The on-site testing [...]
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 [...]
Dynamic range, noise floor, and input range describe different limits of a data acquisition system. Input range sets the maximum measurable signal, input-referred noise constrains the minimum resolvable signal, and dynamic range expresses the span between them. This article explains how to compare these specifications under consistent measurement conditions. In the specification sheets of data [...]
