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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 [...]
Professional audio interfaces, audio analyzers, and data acquisition systems can all capture signals, but they are designed for different measurement tasks. This guide compares their interfaces, measurement capabilities, synchronization, sensor support, and typical applications so engineers can choose the right platform for each test. Scope Definition: In this article, a data acquisition system refers to [...]
In multichannel acoustic testing, entering microphone model numbers, sensitivities, and calibration data one channel at a time is slow and prone to error. TEDS allows a data acquisition system to read key parameters stored in a microphone or preamplifier, helping engineers configure channels faster and maintain consistent test settings. This article tests the CRYSOUND CRY3203-S01 [...]
Many acoustic laboratories, automotive NVH teams, consumer-electronics developers and third-party testing organizations already operate measurement systems built around HBK/Brüel & Kjær, GRAS or PCB Piezotronics products. When existing systems need more channels, replacement sensors, shorter procurement cycles or a complete platform update, engineers often ask a practical question: Which CRYSOUND products should be evaluated against [...]
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. [...]
When validating quietness for home appliances, fans, precision motors, medical devices, transformers, and consumer electronics, we are not only asking whether a product is "loud" or "quiet." We need to know where the sound comes from, under which operating condition it appears, and in which frequency range it becomes uncomfortable. A quiet product can sometimes [...]
Wearable audio devices are becoming smaller, smarter, and more complex. From TWS / OWS earbuds, bone-conduction earphones, hearing aids, smart glasses, and smart watches or smart bands, modern wearable devices can no longer be judged only by whether their acoustic output follows a frequency response curve. In real production environments, a device may pass frequency [...]
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 [...]
High SPL Measurement
Learn how to select a working standard microphone for high SPL testing above 160 dB, including distortion limits, test environment requirements, THD data, and CRYSOUND microphone options.
Sound power measurement is used to quantify the total acoustic energy radiated by equipment, with sound power level, Lw, as the key metric. Unlike sound pressure level, which only indicates how loud a sound is at a particular point, sound power is better suited to noise benchmarking and compliance declarations across sites, laboratories and production [...]
