A vacuum system for inspecting a workpiece, the vacuum system comprising: a housing defining at least a portion of a vacuum chamber; a piston within the housing, wherein the piston is configured to oscillate, thereby varying a chamber volume of the vacuum chamber; a first valve in fluid communication with the vacuum chamber, wherein the first valve comprises a first or open position that permits an intake of a gas into the vacuum chamber and an exhaust of the gas out of the vacuum chamber, and a second closed position that prevents the intake of the gas into the vacuum chamber and the exhaust of the gas out of the vacuum chamber through the first valve; a second valve in fluid communication with the vacuum chamber, wherein the second valve comprises an open position that permits the intake of the gas into the vacuum chamber and the exhaust of the gas out of the vacuum chamber, and a closed position that prevents the intake of the gas into the vacuum chamber and the exhaust of the gas out of the vacuum chamber through the second valve; and a hood configured to be positioned on a surface the workpiece during an application of a vacuum force to the surface of the workpiece by the vacuum system during the inspecting, the hood being in fluid communication with the second valve and the vacuum chamber, wherein the second valve, in the open position, permits a flow of the gas between the vacuum chamber and the hood and, in the closed position, prevents the flow of the gas between the vacuum chamber and the hood through the second valve, wherein the piston is configured to move from a first position in which the chamber volume is a maximum chamber volume, to a second position in which the chamber volume is a minimum chamber volume, and back to the first position at a frequency range of from 60 Hz to 1000 Hz, wherein at least one of the first valve and the second valve is a solenoid pneumatic valve, so that the vacuum system is configured to apply a series of vacuum pressures to the surface of the workpiece, whereby the vacuum pressures are increased and decreased without returning the pressure applied to the surface of the workpiece to atmospheric pressure. a housing defining at least a portion of a vacuum chamber; a piston within the housing, wherein the piston is configured to oscillate, thereby varying a chamber volume of the vacuum chamber; a first valve in fluid communication with the vacuum chamber, wherein the first valve comprises a first or open position that permits an intake of a gas into the vacuum chamber and an exhaust of the gas out of the vacuum chamber, and a second closed position that prevents the intake of the gas into the vacuum chamber and the exhaust of the gas out of the vacuum chamber through the first valve; a second valve in fluid communication with the vacuum chamber, wherein the second valve comprises an open position that permits the intake of the gas into the vacuum chamber and the exhaust of the gas out of the vacuum chamber, and a closed position that prevents the intake of the gas into the vacuum chamber and the exhaust of the gas out of the vacuum chamber through the second valve; and a hood configured to be positioned on a surface the workpiece during an application of a vacuum force to the surface of the workpiece by the vacuum system during the inspecting, the hood being in fluid communication with the second valve and the vacuum chamber, wherein the second valve, in the open position, permits a flow of the gas between the vacuum chamber and the hood and, in the closed position, prevents the flow of the gas between the vacuum chamber and the hood through the second valve, wherein the piston is configured to move from a first position in which the chamber volume is a maximum chamber volume, to a second position in which the chamber volume is a minimum chamber volume, and back to the first position at a frequency range of from 60 Hz to 1000 Hz, wherein at least one of the first valve and the second valve is a solenoid pneumatic valve, so that the vacuum system is configured to apply a series of vacuum pressures to the surface of the workpiece, whereby the vacuum pressures are increased and decreased without returning the pressure applied to the surface of the workpiece to atmospheric pressure.