Blogs
Valves are the "core control components" of pipeline systems. They perform four key functions-opening/closing, regulating, isolating, and directing-enabling precise control of fluid flow. Once sealing integrity fails, minor cases can lead to process upsets and energy losses, while severe cases may result in fires or explosions, toxic exposure, or environmental pollution. We built a valve […]
Sound Level Meter
This article presents a multi-channel sound level meter developed on the OpenTest platform and designed to meet the technical requirements of IEC 61672-1. By integrating the SonoDAQ data acquisition system with measurement-grade microphones, the system implements standard A/C/Z frequency weightings, F/S/I time weightings, and enables accurate measurement of standard acoustic quantities such as Lp, Leq, […]
Sound Quality
Learn how to measure Loudness (ISO 532-1), Sharpness, and Tonality (ECMA-74) with OpenTest - free, open-source software. Step-by-step guide for automotive NVH, consumer electronics & home appliances engineers. This article is for engineers working in acoustics and vibration testing. It introduces how to perform sound quality measurements in OpenTest based on the ISO 532 loudness […]
CRY580 A²B Interface is a bidirectional bridge designed to connect the A²B (Automotive Audio Bus) ecosystem with standard test & measurement setups (e.g., SonoDAQ, CRY6151B, Audio Precision). This article explains what makes A²B testing challenging-most analyzers don't have a native A²B interface-and how CRY580 solves it by encoding/decoding A²B streams and converting them into measurable […]
Spatial audio performance can vary significantly across devices-even when similar audio algorithms are used. This article explains the role of the IMU in spatial audio, outlines key IMU testing challenges, and introduces CRYSOUND's production-ready IMU testing solution based on a three-axis, three-degree-of-freedom (3-DoF) rotary table. You'll learn the working principles, test flow, and application scenarios […]
In industrial testing, research, and quality validation, data acquisition devices (DAQs / audio interfaces / measurement microphone front-ends) are the "front door" of the entire system. As technology and applications become more specialized, a wide variety of DAQ devices has emerged: Hardware is not the bottleneck anymore. The real challenge is: How do you connect, […]
sound power
Under regulations such as the EU Machinery Noise Directive, more and more products-from toys and power tools to IT equipment-are required to declare their sound power level on labels and in documentation, rather than simply claiming they are "quiet enough." For typical office devices like notebook computers, idle noise is often around 30 dB(A), while […]
Electric motors are widely used in modern automobiles and home appliances (such as in-vehicle electric seats and appliance fans), and their smooth operation directly affects product quality and user experience. Motor anomalous sound issues are often summarized as BSR (Buzz, Squeak, and Rattle), which refers to abnormal sounds generated by automotive motors and related components. […]
In audio and vibration testing, engineering teams often find themselves jumping between multiple software tools and data acquisition systems from different vendors. Interfaces vary, workflows are fragmented, and new engineers can spend a significant amount of time just learning the tools before they can focus on the engineering problem itself. OpenTest, developed by CRYSOUND, is […]
Partial discharge is a phenomenon that cannot be completely eliminated from high-voltage motors and generators. However, it is crucial to closely monitor and address partial discharge, as it can impact the performance of insulating materials. In the power industry, inspectors rely on observing the working status and performance of motors by studying the trend of […]
