Blogs
Measurement microphones are used in acoustic metrology, type-approval testing, and engineering measurements. Unlike general audio capture applications, measurement scenarios place far greater emphasis on consistency and traceability: the same microphone should deliver stable output when re-tested over time; variation within a production lot should be sufficiently small; and performance fluctuations between lots should remain controllable. [...]
Before you begin any formal data acquisition work, one critical step is connecting the DAQ front end to the PC. In day‑to‑day engineering, the most common options include USB direct connection, Wi‑Fi wireless, Ethernet, and PXIe. This article introduces these four common connection methods from several angles-how they differ, where each one shines, and their [...]
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 [...]
In audio and vibration testing, FFT analysis (Fast Fourier Transform) is one of the tools almost every engineer uses sooner or later: A lot of practical questions are actually asking the same few things: FFT is the most universal entry point to answer these questions. This article will help you clarify three things from an [...]
In acoustic measurements (SPL, frequency response, noise, reverberation, etc.), large errors often come not from instrument accuracy, but from a mismatch between the assumed sound field and the actual one. What a microphone reads as sound pressure is not strictly equivalent across different fields-especially at mid and high frequencies, where the microphone dimensions become comparable [...]
The Acoustic Imaging Leak Detection System is developed by CRYSOUND and has already been deployed in multiple coal chemical, petrochemical and natural gas facilities. It is used for online leak monitoring in high‑risk areas. This article is written by the Acoustic Imaging Leak Detection System project team at CRYSOUND based on real‑world deployment and operation [...]
A complete engineer's guide to DAQ systems: PCIe/PXI cards, USB/Ethernet recorders, modular multi-channel systems. Covers dynamic range, PTP sync, IEPE, and how to select the right DAQ for NVH, vibration & acoustic testing. A data acquisition system (DAQ) is the measurement front end: it converts analog sensor outputs-such as voltage, current, and charge-into digital data. [...]
As the AR glasses market transitions from proof-of-concept to large-scale commercialization, product capabilities in audio and haptic interaction continue to expand, driving increased demands for production-line testing. With key modules such as audio and VPU (Vibration Processing Units), AR glass production-line testing is evolving from simple functional validation to consistency control aimed at enhancing real-world [...]
Octave-band analysis can be implemented in two fundamentally different ways: FFT binning (integrating PSD/FFT bins into 1/1- and 1/3-octave bands) and a true octave filter bank (standards-oriented bandpass filters + RMS/Leq averaging). In this post, we compare how the two methods work, where their results match, where they diverge (scaling, window ENBW, band-edge weighting, latency, [...]
Octave-band analysis converts detailed spectra into standardized 1/1- and 1/3-octave bands using constant-percentage bandwidth on a logarithmic frequency axis. In this post, we explain the mathematical basis of CPB, why IEC 61260-1 and ANSI S1.11 define octave bands the way they do, and how band levels are computed in practice (FFT binning vs. filter-bank RMS). [...]
In real DAQ use, enclosure durability and scratch resistance directly affect service life and maintenance cost. This article shares a pencil hardness scratch test on the SonoDAQ top cover (PC + carbon fiber) and compares it with a typical laptop enclosure. The results show how the enclosure performs from 2H to 5H and why the [...]
Across acoustics testing, product R&D, environmental noise monitoring, and NVH analysis, simply "capturing sound" isn't the goal-accurate sound measurement is. A measurement microphone is engineered for repeatable, traceable, and quantifiable results, so your data stays comparable across devices, labs, and time. In this post, we explain what a measurement microphone is and how it differs [...]
