Acoustics Testing

Separate the signal from the noise with Precision Filters’ signal conditioners


Measuring sound and vibration can require a range of sensors, including inline pre-amps, IEPE accelerometers, IEPE/charge microphones, and specialized constant voltage line drive (CVLD) accelerometers, which are designed to function in high EMI environments. You need a world-class data measurement system to interface with these sensors and to condition, display, analyze, and store your critical test data.

Precision Filters’ signal conditioners are an essential part of that system. Whether the sensor type is voltage, IEPE, bridge, or charge, each channel is fully programmable to provide sensor-scaled, amplified, and filtered signals to the downstream A/D converters. Equipped with Precision’s flat/pulse filter technology, these amplifiers provide outstanding response for applications in either the time domain or the frequency domain and have outstanding phase match for beam-forming applications. The 28918A is an eight-channel, dual-mode card that accepts CVLD, IEPE, or voltage inputs. The 28144 strain/bridge conditioner and the 28304 quad charge/IEPE conditioner features REZCOMP™REZCOMP™ extends frequency response resonant compensation technology, which effectively compensates the resonant response associated with the protective screen of a microphone sensor, extending the usable sensor bandwidth. And the 28304’s LDTEDS™ can communicate with TEDS-capable sensors to a distance of 1500 feet.

To make sure you’re getting good data, Precision Filters products come with built-in sensor and cable health checks—so you know at test time that everything is working as it should.

Conditioning Cards for Acoustics Testing

Precision Filters’ suite of conditioning cards for acoustic and vibration measurements provide solutions for strain and bridge sensors (28144), charge and IEPE accelerometers (28304) and underwater acoustics noise and vibration measurements, especially in high magnetic field environments. (28918A).

Strain/Bridge Conditioner

28458 Dynamic Strain Conditioner
  • 4-channels/ card,
    64-channels/ system
  • Excitation: Balanced Constant Current™
    or constant voltage
  • REZCOMP™ technology to extend frequency response of accelerometer, microphone and pressure sensor measurements

View 28144 Spec Sheet

Charge/IEPE Conditioner
28144 Strain/Bridge Conditioner w/ LDTEDS™

  • 4-channels/ card,
    64-channels/ system
  • Dual mode: IEPE or charge
  • REZCOMP™ technology to extend frequency response of accelerometer, microphone and pressure sensor measurements

View 28304 Spec Sheet

28918A 8-Channel CVLD/IEPE Conditioner

28918A 8_channel CVLD-IEPE Conditioner
  • 8-channels/ card,
    128-channels/ system
  • IEPE, CVLD or voltage inputs
  • Designed for High EMI Environments

View 28918A Spec Sheet

28000 Signal Conditioning System


The 28000 System makes it easy to manage a test with up to 256 channels of fully programmable transducer conditioning. Choose a mix of bridge, charge, IEPE w/TEDS, voltage (filter/amplifier), strain, thermocouple, RTD/potentiometer, frequency or other transducers.

  • Mix up to 256 channels of fully programmable transducer conditioning
  • Choose from 4 or 8-pole programmable filters
  • Choice of 4, 8 or 16-slot chassis
  • Ethernet network interface
  • Automated factory acceptance and go/no-go tests verify system performance

View the 28000 Brochure/Spec Sheet