Sound Power Testing Solution

Overview

CRYSOUND provides an integrated sound power testing solution to address common challenges faced by enterprises in noise compliance, noise control, and product optimization. The solution standardizes the sound power testing workflow based on sound pressure methods into a reusable and engineering-oriented process: standardized microphone positioning, guided parameter configuration, multi-channel synchronous acquisition, automatic calculation of K1/K2 corrections and sound power results, and customizable report generation. This significantly lowers the testing threshold and improves the consistency and accuracy of sound power results across batches and laboratories. The solution applies to noise rating and regulatory certification for products including industrial equipment and engineering machinery, automotive/aerospace key components, home appliances and consumer electronics, and power generation and energy storage systems.

Typical Application Scenarios

Consumer Electronics & Home Appliances: Sound power testing for home appliances to support noise rating calibration and external specification claims, as well as mass-production consistency verification and sampling acceptance (including batch variation, supplier changes, and process adjustments).
General Industrial Equipment: Sound power measurement and noise evaluation for pumps/fans/compressors, motor & drivetrain systems, and cabinet/packaged equipment, enabling noise level benchmarking, overall noise control, design/process optimization, and supplier technical assessment.
Automotive & Transportation: Sound power testing for e-drive-related components and thermal management/HVAC components, used for supplier solution comparison, component-level NVH evaluation, and comfort-target optimization validation.
Data Centers: Noise measurement for servers and rack cooling systems, as well as cumulative noise assessment in high-density deployment scenarios, supporting cooling solution optimization, noise control verification, and facility planning/remediation evaluation.
Building MEP (Mechanical, Electrical & Plumbing): Sound power testing for HVAC units/heat-source equipment and ventilation terminals/accessories, used for environmental noise impact assessment and system noise control solution comparison.

Support for Multiple Testing Standards

OpenTest currently supports multiple sound power standards based on sound pressure methods (ISO 3744 / ISO 3745 / ISO 3746) and is developing companion algorithms for sound intensity methods, aiming to cover full-scenario sound power testing needs with a single software platform;
OpenTest automatically calculates K1 and K2 values to apply background noise and environmental corrections, ensuring accurate and standards-compliant sound power data;
While outputting sound power results, OpenTest also preserves complete raw time-domain waveforms and frequency-domain data, and links key metadata such as microphone positions, calibration records, and environmental parameters for deeper analysis and data management.

Fast and Efficient Test Environment Setup

We provide standard hemispherical microphone frames (radius 1 m / 1.5 m). The compact mechanical design enables quick assembly and deployment, helping users save substantial setup time;
For cuboid measurement surfaces, OpenTest can automatically calculate microphone coordinates based on the reference source dimensions and measurement distance, enabling rapid setup without complex manual calculations;

Rich Result Visualization

OpenTest supports multiple views such as real-time waveforms, microphone layout diagrams, sound pressure level/sound power level curves, 1/3-octave spectra, and tabulated data for fast verification;
Charts support zooming, local magnification, and range-based inspection, enabling detailed analysis of key frequency bands or abnormal time segments;
OpenTest also supports one-click export of all charts and tables as high-resolution images/data files, convenient for test reports and technical reviews.

Custom Reports and One-Click Export

Built-in ISO-compliant report templatesBuilt-in ISO-compliant report templates automatically summarize test information, measurement points and acquisition parameters, calculation results, and key figures;
Report structure and content are customizable, allowing company logos, personnel information, remarks, and selectable display dimensions as needed;
One-click report export eliminates the need for manual data processing and secondary report editing. automatically summarize test information, measurement points and acquisition parameters, calculation results, and key figures;
Report structure and content are customizable, allowing company logos, personnel information, remarks, and selectable display dimensions as needed;
One-click report export eliminates the need for manual data processing and secondary report editing.

High-Performance Synchronous Acquisition for Reliable Data

SonoDAQ Pro supports multi-channel synchronous acquisition. A single chassis can cover 24 measurement points; for larger setups, daisy-chain channel expansion is supported. With PTP synchronization, inter-channel phase error is kept within <= 100 ns;
For multi-point acquisition, individual microphone calibration using a sound calibrator is unnecessary; sensitivities can be configured directly via TEDS;
SonoDAQ Pro provides 1000 V isolation and strong anti-interference capability, enabling stable operation in complex electromagnetic environments.

Next-Generation Data Acquisition Platform - SonoDAQ Pro

Modular design supports up to 6 modules per chassis, with optional dual battery modules to ensure smooth outdoor testing. Channels and functional modules can be expanded, enabling one system to meet diverse test requirements;
Outstanding hardware performance: 32-bit resolution, 160 dB dynamic range, 204.8 kHz sampling rate, -117 dBV noise floor, and more, ensuring high-precision data acquisition;
Supports IEPE power and TEDS, allowing rapid microphone deployment without an external microphone power supply.

CRY3213 NVH Microphone - Designed for NVH Testing

Safe operation in humid and splash-prone environments; compliant with IP67 protection rating to meet outdoor testing needs;
Immunity to conducted and radiated disturbances meets GB/T 17626, suitable for harsh electromagnetic environments;
Dynamic range 17 dB(A) to 136 dB; frequency range 3.15 Hz to 20 kHz, covering most test scenarios;

Standard Hemispherical Test Frame with Quick Assembly

Available in 1 m and 1.5 m radius configurations. Standard microphone positions are marked on the frame to ensure full compliance with standard requirements;
Modular design makes disassembly and on-site installation convenient, significantly reducing setup time and improving efficiency;

Multi-Function Acoustic Calibrator - CRY3018

Supports dual calibration frequencies (250 Hz / 1000 Hz) and sound pressure levels (94 dB / 114 dB), meeting IEC 60942:2017 Class 1 requirements;
Integrates high-precision humidity, temperature, and barometric pressure sensors; combined with an acoustic feedback system, it automatically compensates the impact of environmental fluctuations on the output signal;
Built-in lithium battery with fast charging: 5 minutes of charging provides 1 hour of operation; a full charge supports nearly 1,000 calibrations.

Open Audio and NVH Testing Software - OpenTest

OpenTest is CRYSOUND's next-generation acoustic and NVH testing software platform, offering Measurement Mode, Analysis Mode, and Sequence Mode to cover the complete workflow from R&D to production lines. With a modular architecture, it currently supports not only sound power testing but also electroacoustic testing, sound level meter functions, spectrum analysis, sound quality analysis, and more.
It also supports open hardware access (openDAQ/ASIO/WASAPI and NI-DAQmx, etc.) and a three-layer plugin architecture (Algorithm/Theme/Application) to reuse existing acquisition hardware. Plugin-based extension and secondary development are supported via Python, MATLAB, LabVIEW, and C++, allowing users to adapt the software to their own test standards and business workflows so the software grows to fit project needs.

System Devices

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If you are interested or have questions about our products, book a demo and we will be glad to show how it works, which solutions it can take part of and discuss how it might fit your needs and organization.

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