Liberty Quiet Fleet™

Hydraulic Fracturing and the Community:

  • Today’s hydraulic fracturing operations are more environmentally friendly
    • Dual Fuel Fleets have lower emissions
    • Newer proppant transport systems generate less dust with less silicosis risk
    • Greener chemicals are used with more disclosure of what is pumped
    • Pad operations minimize land use
  • Noise generated during 24/7 operations can be an issue when operating near communities and homeowners
  • Liberty Oilfield Services has spent two years developing a proprietary new Quiet Fleet™ design which will reduce noise levels by 3X over a conventional fracturing fleet.  The Quiet Fleet™ has lower sound levels at a distance of 500’ from the center of a frac location than a conventional fleet would have at 1000’ 


  • First and foremost, Liberty wants to be a good neighbor in our communities. By reducing sound levels, we will lessen the nuisance factor caused by hydraulic fracturing activities
  • Dramatically lower noise levels will reduce fatigue and stress levels of onsite personnel, allowing them to work more safely
  • Noise levels during wellsite operations are coming under increased scrutiny as part of a dialogue on setback restrictions.  The Quiet Fleet™ will help significantly in this area, allowing operators increased flexibility in the location of pads and hours during which hydraulic fracturing can be completed

Liberty CEO, Chris Wright & Extraction President, Matt Owens, show exactly how quiet completions are using The Quiet Fleet™ :

  • Volume vs pressure vs intensity
  • Doubling of the volume (loudness) should be sensed as a level difference of +10 dB − acousticians say.
  • Doubling the sound pressure (voltage) corresponds to a measured level change of +6 dB
  • Doubling of sound intensity (acoustic energy) results in a calculated level change of +3 dB.

  • Definition of “doubling levels”
  • +10 dB is the level of twice the perceived volume or twice as loud (loudness) in psychoacoustics − this is mostly sensed
  • +6 dB is the level of twice the (RMS) value of voltage respectively sound pressure − this is mostly measured
  • +3 dB is the level of twice the energy or power intensity − this is mostly calculated

  • Compared with total dB, A-weighted measurements (dBA scale) underestimate the perceived loudness, annoyance factor, and stress-inducing capability of noises from low frequency components, especially at moderate and high volumes of noise. dBA is currently the reference scale used for most measurements of sound

  • Another system of adjustment is C-weighting, the dBC scale. dBC is sometimes used for specifying peak or impact noise levels, such as gunfire. Unweighted dB readings are also used for this purpose; there is usually not much difference between the two.

Common Noise Levels compared to modeled Quiet Fleet Data: