Noise generated by a hydraulic fracturing system is abated by locating noise reduction equipment at strategic locations, and also by routing inlet and exit air along designated paths. Noise insulation panels are disposed around trailer mounted machinery to attenuate and redirect the noise generated by the machinery. The panels extend a distance above the machinery so that the noise is directed upward and away from operations personnel proximate the machinery. Air handling equipment having air inlets and exits that are formed to reduce turbulence, and thus noise, as well as redirect the flow of air to attenuate noise generated by its flow within the inlets and exits.