An audio headphone to couple to a strap for a head-mounted display is disclosed. The audio headphone includes a headphone speaker, a strap connector, and a four-bar linkage coupled to the strap connector to provide inward and outward movement of the headphone speaker with respect to a user's ear. The four-bar linkage comprises a first member coupled to the strap connector via a first joint, a second member coupled to the first member via a second joint, a third member coupled to the second member via a third joint, and a fourth member connected to the third member and coupled to the first member via a fourth joint. The fourth member is further coupled to the strap connector via a fifth joint. The third member comprises one or more rigid poles extending from the second member to the fourth member and surrounded by one or more respective elastic springs.