A device includes a first microphone at a first position on the device, a second microphone at a second position on the device, a first speaker at a third position on the device, and a second speaker at a fourth position on the device. The first, second, third, and fourth positions of the device are different positions. The device also includes a controller configured to determine a physical characteristic of the device. The controller is further configured to select, based on the determined physical characteristic, among the first microphone at the first position on the device and the second microphone at the second position on the device. The controller is additionally configured to select, based on the determined physical characteristic, among the first speaker at the third position on the device and the second speaker at the fourth position on the device.