Methods and apparatus for signal transmission via body conduction are disclosed herein. The assembly may be attached, adhered, or otherwise embedded into or upon a removable oral appliance to form a bearing aid assembly. Such an oral appliance may be a custom-made device which can enhance and/or optimize received data and/or audio signals for vibrational conduction to the user. Data and/or audio signals may be encoded and transmitted or received along or through the user's body to an oral appliance contained within or along the user's mouth. Alternatively, information may be transmitted between various other devices over the user's body aside from an oral appliance. The encoded signals may be decoded and the auditory signals may be transmitted via vibrational conductance to the user.