Selecting a Multi-Channel DAQ System for Acoustic and Vibration Measurement

Choosing the right data acquisition system for acoustic and vibration measurement involves understanding sample rate and anti-aliasing filter design, dynamic range and ADC resolution, channel count and simultaneous sampling requirements, and IEPE power supply capabilities.

• 24-bit ADCs provide approximately 144 dB theoretical dynamic range
• Anti-aliasing filters must be considered for the measurement frequency range
• IEPE current supply: 2–20 mA at 18–30 V compliance voltage
• Simultaneous sampling eliminates phase errors in multi-channel measurement