The turbulence intensity of ducted flow near a suction tube on the centerline of the duct and parallel to the flow is measured using X-array hot-wire anemometers. Typical profiles of the axial components of rms turbulence velocity for various suction rates are presented. It is shown that the relative turbulence intensity near the suction tube inlet decreases due to the acceleration of the flow, and flow deceleration by the suction acts to increase the relative turbulence intensity. Low-speed suction is shown to reduce the Reynolds number and the relative turbulence intensity while high-speed suction increases both parameters. Results for the radial component of the rms turbulent velocity are found to be similar to those for the axial component, with centerline intensities of 7% and 5%, respectively.