The cable ties (here, already cut to length after tightened) hold the cable firmly to the frame of the headphone driver, which makes sure the sensitive wires at the driver base can’t be damaged in case the cables get pulled with force. [On-Set Audio Monitoring: How to make $30 DIY Passive Noise Canceling Headphones]

The cable ties (here, already cut to length after tightened) hold the cable firmly to the frame of the headphone driver, which makes sure the sensitive wires at the driver base can't be damaged in case the cables get pulled with force.