Sound and Vibration Data Acquisition
NI USB-4432 NEW!
• 24-bit resolution Recommended Software
• 101 dB dynamic range • LabVIEW
• 5 simultaneous analog inputs • Sound and Vibration Toolkit
• ±40 V input range • Sound and Vibration Measurement Suite
• Antialiasing filters
• TEDS read/write
• Software-selectable AC/DC
coupling (0.1 Hz HPF)
Max Sampling sensors. The USB-4432 provides ±60 V of overvoltage protection for
Model Rate IEPE Coupling
IEPE sensor connections. It has three software-selectable modes of
USB-4432 102.4 kS/s Software-selectable (0 or 2.1 mA) Software-selectable AC/DC
measurement operation: IEPE-on with AC coupling, IEPE-off with AC
Table 1. NI C Series Dynamic Signal Acquisition Selection Guide
coupling, and IEPE-off with DC coupling.
Overview The USB-4432 uses a method of analog-to-digital conversion known
The NI USB-4432 is a five-channel dynamic signal acquisition module for as delta-sigma modulation. If, for example, the data rate is 25 kS/s, then
making high-accuracy measurements from IEPE sensors. The USB-4432 each ADC actually samples its input signal at 3.2 MS/s (128 times the
delivers 101 dB of dynamic range and incorporates software-selectable data rate) and produces samples that are applied to a digital filter. This
IEPE (2.1 mA constant current) signal conditioning for accelerometers filter then expands the data to 24 bits, rejects signal components greater
and microphones. The five channels simultaneously acquire at rates than 12.5 kHz (the Nyquist frequency), and digitally resamples the data
from 1 to 102.4 kS/s. In addition, the module includes built-in antialiasing at the chosen data rate of 25 kS/s. This combination of analog and
filters that automatically adjust to your sampling rate. The USB-4432 is digital filtering provides an accurate representation of desirable signals
ideal for a wide variety of mobile/portable applications such as industrial while rejecting out-of-band signals. The built-in antialiasing filters
machine condition monitoring; in-vehicle noise, vibration, and harshness; automatically adjust themselves to discriminate between signals based
and audio test systems. on the frequency range, or bandwidth, of the signal.
Hardware Analysis Software
Analysis Capabilities The USB-4432 is well-suited for noise and vibration analysis applications.
• Power spectra The NI Sound and Vibration Measurement Suite, which specifically
• Zoom FFTs addresses these applications, has two components: the NI Sound and
• Fractional-octave analysis Vibration Assistant, for quick and easy configuration, and LabVIEW
• Vibration-level measurements analysis VIs for development of customized test and control systems.
• Order spectra
• Transient analysis NI Sound and Vibration Assistant
• Psychoacoustic analysis The Sound and Vibration Assistant is interactive software designed to
Each simultaneous signal is buffered, analog prefiltered, and sampled simplify the process of acquiring and analyzing noise and vibration
by a 24-bit delta-sigma analog-to-digital converter (ADC) that performs signals by offering:
digital filtering with a cutoff frequency that automatically adjusts to your • A drag-and-drop, interactive analysis and acquisition environment
data rate. The USB-4432 features a voltage range of ±40 V and a dynamic • Rapid measurement configuration
range of 101 dB. In addition, the modules include the capability to read • Extended functionality through LabVIEW
and write to transducer electronic data sheet (TEDS) Class 1 smart
Sound and Vibration Data Acquisition
Interactive Analysis Environment Sound and Vibration Analysis VIs for LabVIEW
With the sound and vibration analysis VIs in LabVIEW, you can develop
a variety of custom audio, acoustic, and vibration applications.
Functionality includes:
• Full, 1/3, 1/6, 1/12, and 1/24 octave analysis with linear
A-, B-, or C-weighting
• Vibration level with single or double integration
• Sound level with linear A-, B-, or C-weighting
• Baseband, zoom, and subset power spectrum
• Peak search
• Power-in-band
• Frequency response (FRF)
• Filtering
• Swept sine
Figure 1. Engine Noise Run-Up in the Sound and Vibration Assistant • Distortion analysis (THD, THD+N, IMD)
• Noise measurements (SNR)
The Sound and Vibration Assistant introduces an innovative approach to • Human vibration weighting filters
configuring your measurements using intuitive drag-and-drop steps. • Torsional vibration
Combining the functionality of traditional noise and vibration analysis • Sound quality analysis
software with the flexibility to customize and automate routines, the • Tachometer signal processing
Sound and Vibration Assistant can help you streamline your application. • Order tracking
• Order spectrum
Rapid Measurement Configuration • Order extraction
The Sound and Vibration Assistant features many built-in steps that you • Spectral map
can use immediately. You can instantly configure a measurement and • Waterfall display for power, octave, and order spectra
analysis application with: • Data presentation in cascade, shaft centerline, orbit, Bode, or polar
• Hardware I/O – generation and acquisition of signals from a variety of plot format
devices, including data acquisition devices and modular instruments • Shock response spectrum
• Signal processing – filtering, windowing, and averaging • File input and output to UFF58
• Time-domain analysis – sound- and vibration-level measurements
• ANSI and IEC fractional-octave analysis
• Frequency-domain analysis – power spectrum, frequency response,
power-in-band, peak search, and distortion
• Order analysis – tachometer processing, order power spectrum, order
tracking, and order extraction
• Sound quality – sharpness, loudness, and roughness measurements
• Report generation – ability to drag and drop signals to Microsoft Excel
or export data to Microsoft Word or UFF58 files
Extended Functionality through LabVIEW
Reuse your measurement applications developed with the Sound and
Vibration Assistant in LabVIEW by converting projects into LabVIEW Figure 2. The NI Sound and Vibration Measurement Suite features more than 30 Express
block diagrams. With the LabVIEW full-featured graphical programming VIs for signal processing including octave analysis.
environment, you can further automate your application or customize
your analysis.
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2
Sound and Vibration Data Acquisition
Recommended Hardware
The Sound and Vibration Measurement Suite includes more than 50
examples that work with both dynamic signal acquisition (DSA) and
multifunction data acquisition devices. For sound and vibration data
acquisition, National Instruments recommends DSA devices. With
24-bit ADCs and digital-to-analog converters (DACs) and integrated
antialiasing filters, DSA devices are ideal for acoustic, noise, and
vibration measurements.
There are numerous system requirements to consider when selecting
data acquisition hardware for measuring or generating sound and
vibration signals. From IEPE signal conditioning for accelerometers and
microphones to high dynamic range (up to 118 dB) and multichannel
synchronization (up to 13,000 channels), National Instruments offers a
wide range of hardware products for your applications.
Input Dynamic Sampling Rate Analog TEDS Analog
Product Bus Resolution (bits) Range (dB) per Channel Inputs Input Range Gain Settings Coupling Support Outputs
High Performance
NI 4461 PXI, PCI 24 118 204.8 kS/s 2 ±42 V to 316 mV -20 to 30 dB in 10 dB increments AC/DC 2
NI 4462 PXI, PCI 24 118 204.8 kS/s 4 ±42 V to 316 mV -20 to 30 dB in 10 dB increments AC/DC –
High Density
NI 4495 PXI 24 114 204.8 kS/s 16 ±10 to 1 V 0 and 20 dB DC – –
NI 4496 PXI, PXI Express 24 114 204.8 kS/s 16 ±10 to 1 V 0 and 20 dB AC –
NI 4498 PXI, PXI Express 24 114 204.8 kS/s 16 ±10 V to 316 mV 0 to 30 dB in 10 dB increments AC –
Low Cost
NI 4472 PXI, PCI 24 110 102.4 kS/s 8 ±10 V N/A AC/DC – –
NI 4474 PCI 24 110 102.4 kS/s 4 ±10 V N/A AC/DC – –
Portable/Compact
NI 9233 USB 24 102 50 kS/s 4 ±5 V N/A AC –
NI 9234 USB, Wi-Fi 24 102 51.2 kS/s 4 ±5 V N/A AC/DC –
NI 4432 USB 24 101 102.4 kS/s 5 ±40 V N/A AC/DC –
Table 2. Additional NI Dynamic Signal Acquisition Devices
Ordering Information
NI USB-4432 ..........................................................................779680-01
NI USB-4432 with Sound and Vibration
Measurement Suite ..........................................................779680-02
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For complete product specifications, pricing, and accessory
information, call 800 813 3693 (U.S.) or go to ni.com/soundandvibration.
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Sound and Vibration Data Acquisition
Specifications Safety and Compliance
Safety
>> For complete specifications, see the NI USB-4432 Specifications
This product is designed to meet the requirements of the following
manual at ni.com/manuals.
standards of safety for electrical equipment for measurement, control,
Analog Input and laboratory use:
Input channels..................................... 5 • IEC 61010-1, EN 61010-1
Input connector ................................... 1 BNC per channel • UL 61010-1, CSA 61010-1
ADC resolution.................................... 24 bits Note: For UL and other safety certifications, refer to the product label or
ADC type ............................................. Delta-sigma visit ni.com/certification, search by model number or product line, and
Sampling mode ................................... Simultaneous click the appropriate link in the Certification column.
Sample rates (ƒs) ................................. 1 to 102.4 kS/s
Sample rate accuracy ......................... ±100 ppm max Electromagnetic Compatibility
Input range.......................................... ±40 Vpk This product meets the requirements of the following EMC standards
Input protection................................... ±60 V max for electrical equipment for measurement, control, and laboratory use:
Input coupling ..................................... AC or DC,
• EN 61326 (IEC 61326): Class A emissions; Basic immunity
each channel independently
• EN 55011 (CISPR 11): Group 1, Class A emissions
software selectable
• AS/NZS CISPR 11: Group 1, Class A emissions
Frequency Response • FCC 47 CFR Part 15B: Class A emissions
Amplitude flatness • ICES-001: Class A emissions
Input Signal Frequency (ƒin) Flatness1 Note: For EMC compliance, operate this product according to
±0.01 dB typ the documentation.
20 Hz to 20 kHz
±0.02 dB max
±0.02 dB typ CE Compliance
20 Hz to 46.4 kHz
±0.05 dB max
1Relative to 1 kHz
This product meets the essential requirements of applicable European
Directives, as amended for CE marking, as follows:
Phase linearity
• 2006/95/EC; Low-Voltage Directive (safety)
ƒin = 20 Hz to 20 kHz...................... ±0.01°
• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)
ƒin = 20 Hz to 46.4 kHz................... ±0.05°
Interchannel phase mismatch Note: Refer to the Declaration of Conformity (DoC) for this product for
(ƒin ≥ 100 Hz)................................... 0.015°/kHz · ƒin typ any additional regulatory compliance information. To obtain the DoC for
0.03°/kHz · ƒin max this product, visit ni.com/certification, search by model number or
-3 dB bandwidth.................................. 0.49 · ƒs product line, and click the appropriate link in the Certification column.
AC coupling
Waste Electrical and Electronic Equipment (WEEE)
-3 dB cutoff frequency.................... 0.1 Hz
-0.1 dB cutoff frequency................. 0.7 Hz EU Customers: At the end of their life cycle, all products must be
ADC filter delay (nominal) .................. 38 samples sent to a WEEE recycling center. For more information about WEEE
recycling centers and National Instruments WEEE initiatives,
visit ni.com/environment/weee.htm.
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