Headband Deformation Measurement: Analyzing Bending Position and Unloading Recovery

A headphone headband must balance clamping force, wearing comfort, and structural durability. A headband that is too stiff may increase wearing pressure, while one that is too soft may compromise the holding effect. Traditional single-point measurement can hardly fully reflect the differences in deformation across headband regions during loading.

Haytham Monocular 3D visual strain gaugeUsing monocular 3D DIC digital image correlation technology, the 3D displacement and surface deformation throughout the loading and unloading process are recorded without contacting the headband. Through full-field measurement, it is possible to intuitively analyze where the headband bending is mainly concentrated, whether the deformation on the left and right sides is symmetric, and whether obvious strain concentration appears at the joints, transition zones, and weak regions.

After unloading, the system can continue to track the recovery process of the headband and measure the residual deformation to determine whether the material and structure can return to their initial state. By comparing data under different loads and cycle counts, the elastic recovery capability and long-term service stability of the headband can be further evaluated.

Headphone headband deformation measurement is applicable to over-ear headphones, smart wearable devices, and lightweight curved structures, providing a basis for material selection, wall thickness design, clamping force optimization, wearing comfort analysis, and durability testing.