Audio Test

Developing the G.R.A.S. Microphone Calibration System Using NI LabVIEW and National Instruments Hardware

Jacob Sondergaard
GRAS Sound & Vibration

"A key reason for selecting National Instruments modular hardware over traditional boxed instrumentation for our application was the ease of integration with LabVIEW, which shortened our overall development time."

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Automated test for audio devices is becoming more prevalent as the number of devices that contain a speaker and a microphone expands. To maximize throughput, an automated test solution is required for reproducible audio test results. Developing these test systems is becoming ever more challenging as the complexity of the devices continues to increase.

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NI PXI provides an ideal platform for audio test when combined with the high-performance NI 4461 modules. These modules feature two analog input and two analog output channels with 118 dB dynamic range. When you combine this with the flexibility of the PXI platform to expand channel count and generate other signals, you create the ideal hardware for audio test. NI AudioMASTER delivers a software architecture for quickly developing audio test steps and automatically placing them into NI TestStand software. This gives you a common tool from design and verification to final automated testing.

NI AudioMASTER for Analog and Digital Audio

Complete NI test system includes hardware and software

  • Comprehensive measurements using single and multiple tones, amplitude and frequency sweeps, and more
  • 24-bit analog audio generation and acquisition for maximum signal to noise ratio
  • Digital audio acquisition for S/PDIF with 8-, 16-, 20-, and 24-bit depths from 22 to 192 kHz

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NI AudioMASTER for Analog Audio

Comprehensive software and hardware suite for analog audio test

  • More than 50 measurements using single and multiple tones, amplitude and frequency sweeps, and more
  • Audio acquisition and analysis at up to 204.8 kS/s with 24 bits of resolution

Configure your system

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NI Platform Advantages

  • Channel count and signal type flexibility with NI modular instruments
  • Ability to achieve maximum throughput with minimal development effort when combined with NI TestStand
  • NI has local support worldwide to help with your device test applications

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