High-Channel-Count Sound and Vibration Measurements

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  • 16 simultaneous analog input channels
  • 24-bit resolution ADCs
  • 204.8 kS/s maximum sampling rate
  • 113 dB dynamic range
  • Up to 4 gain settings for ranges from ±316 mV to ±10 V
  • IEPE and TEDS for accelerometers and microphones

The National Instruments PXI-4498 and PXI-4496 are high-accuracy data acquisition modules specifically designed for sound and vibration applications. With sixteen 24-bit analog inputs per module and IEPE constant current signal conditioning, NI PXI-449x modules are ideal for making precision measurements with microphones, accelerometers, and other transducers that have very large dynamic ranges. The modules deliver 113 dB of dynamic range and simultaneous sampling on all 16 channels at rates up to 204.8 kS/s. In addition, the modules include built-in antialiasing filters that automatically adjust to your sampling rate and software-selectable input gains up to 30 dB (±316 mV range). Common applications for a PXI-449x include in-vehicle acoustic test, noise, vibration, and harshness (NVH) analysis; large microphone arrays; and dynamic structural test.