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PU Regular Particle Velocity Probe

The PU Regular is the world’s first probe to measure sound pressure and particle velocity physically at the same point. Give your product an edge by unleashing the complete potential of a PU probe to quantify, visualise and localise your sound sources even in the most demanding testing environments.


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The Microflown PU probe is able to simultaneously measure multiple acoustic properties such as sound pressure and particle velocity at any point of a sound field. As the only probe that can directly capture the complex acoustic behaviour present in the near field, detailed acoustic information becomes easily available to accurately find and quantify the acoustic output of multiple sound sources. The broadband response of the probe covers the complete frequency range from 20 Hz to 10000 Hz, without the need of introducing any assumptions or computational errors.

The PU Probe, a sound intensity probe is the combination of two sensors: a traditional microphone and a Microflown. The working principle allows the operation of the probe in-situ in real operating conditions without the need for special acoustically treated environment. Furthermore, the sensor is applicable in a wide range of scenarios like reverberation conditions, closed cavities like for example, car interiors, to carry out measurements to study the sound field, localise the sound sources or the contribution of sound sources to a particular position i.e. sound source ranking.


  • Broad Band | 20Hz -10kHz
  • Compact
  • Low susceptibility to P/I
  • Low susceptibility to environment


  • Noise Source Identification
  • Sound Intensity
  • Sound Power
  • PVL measurements
Sensor performanceSound Pressure | Particle Velocity
Sensitivity65 mV/Pa | 30 V/(m/s)
Frequency Range (±1 dB)40 – 8000 Hz
Frequency Range (±2 dB)20 – 10000 Hz
Maximum Level112 dB | 125 dB
Noise floor (20 Hz – 2 kHz)22 dB(A) | 27 dB(A)
Noise floor (20 Hz – 10 kHz)27 dB(A) | 43 dB(A)
EnvironmentalSound Pressure | Particle Velocity
Temperature range-20 to 63 °C
Temperature Coefficient0.067 dB/°C | 0.006 dB/°C
Influence of Humidity (30 – 90%)0.05 dB/%RH | 0.06 dB/%RH
Static Pressure Coefficient< 0.5 dB/kPA
Maximum airflow1.5 m/s
Physical dimensions
Connector type7 pin LEMO
Weight36.7 g
Diameter12.7 mm (1/2 inch)
Length89.5 mm


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