A forming system comprising: a femtosecond laser configured to emit laser pulses onto an inner surface of a face sheet of an acoustic inner barrel , the acoustic inner barrel including an acoustic core comprising an array of hexagonal cells attached to an outer surface of the face sheet that is opposite the inner surface; and a control unit comprising one or more processors operatively connected to the femtosecond laser , the control unit configured to control the femtosecond laser to laser drill a plurality of perforations in the face sheet via emitting laser pulses at pulse durations of less than about 10,000 femtoseconds and at frequencies over 100,000 Hz such that the perforations are formed without burning portions of the face sheet or the acoustic core surrounding the perforations, wherein the femtosecond laser includes a scanning head , and the control unit is configured to control the scanning head to emit one or more laser pulses at each of multiple perforation locations along the face sheet one at a time in a sequence, and to repeat the sequence multiple times to gradually form the perforations at the perforation locations, wherein the forming system further comprises a positioning platform on which the acoustic inner barrel is to be mounted, wherein the positioning platform has multiple actuators that are configured to engage and move the acoustic inner barrel , wherein the actuators are rollers, wherein the rollers are configured to rotate the acoustic inner barrel in a rotational direction about a centreline axis of the acoustic inner barrel , wherein at least one stabilizing roller is configured to engage the acoustic inner barrel above the centerline axis . a femtosecond laser configured to emit laser pulses onto an inner surface of a face sheet of an acoustic inner barrel , the acoustic inner barrel including an acoustic core comprising an array of hexagonal cells attached to an outer surface of the face sheet that is opposite the inner surface; and a control unit comprising one or more processors operatively connected to the femtosecond laser , the control unit configured to control the femtosecond laser to laser drill a plurality of perforations in the face sheet via emitting laser pulses at pulse durations of less than about 10,000 femtoseconds and at frequencies over 100,000 Hz such that the perforations are formed without burning portions of the face sheet or the acoustic core surrounding the perforations, wherein the femtosecond laser includes a scanning head , and the control unit is configured to control the scanning head to emit one or more laser pulses at each of multiple perforation locations along the face sheet one at a time in a sequence, and to repeat the sequence multiple times to gradually form the perforations at the perforation locations, wherein the forming system further comprises a positioning platform on which the acoustic inner barrel is to be mounted, wherein the positioning platform has multiple actuators that are configured to engage and move the acoustic inner barrel , wherein the actuators are rollers, wherein the rollers are configured to rotate the acoustic inner barrel in a rotational direction about a centreline axis of the acoustic inner barrel , wherein at least one stabilizing roller is configured to engage the acoustic inner barrel above the centerline axis . <EOS>