Abstract: A sound transmitting device configured to fit within an ear canal, such as a hearing aid or a monitor, for example, having first and second portions which are relatively movable with respect to each other. As a result of these relatively moving portions, the device can better accommodate changes in the shape and/or orientation of the ear canal. To facilitate this relative movement, the first and second portions can include at least partially spherical surfaces which are configured to permit relative movement therebetween. In various embodiments, the device can further include a transmitter for converting electrical signals into sound waves and a seal, where the seal can be configured to prevent, or at least inhibit, sound waves from emanating or leaking into various portions of the device.