Small-scale Helmholtz resonators embedded in a wall beneath a turbulent boundary layer can modify the energy of the turbulent velocity fluctuations when the resonator frequency is tuned in certain ways to the characteristic frequencies in the flow. This work experimentally investigates the impact of an array of small-scale Helmholtz resonators on a turbulent boundary layer, using particle image velocimetry and hot- wire anemometry. The specific aim of the study is to address whether the effect of a single Helmholtz resonator is amplified when multiple resonators are arranged in an array. In this investigation, we study a turbulent boundary layer flow at a friction Reynolds number of Reτ ≈ 2600 using two different array configurations.