The translated ultrasounds are heard through headphones and seen as intensity increments, usually decibels on a display panel. High frequency tuning allows users to adjust for differences in fluid viscosity (i.e. water vs. steam) and reduce any interference from stray pipe noises. Ultrasound spectral analysis provides an “image” of sound to help determine fluid flow characteristics. Using the time series screen it is possible to determine low, medium or high flow conditions.