The embodiments of the invention concern a keypad (120). The keypad can include a membrane (143), at least one key with at least one flange 150 to overlap with at least one second flange of a second key (146), and at least one audio port opening (107) in the membrane for providing a passage of air from a transducer (101) positioned behind at least one key through the keypad to a main volume area (112). For example, the audio port opening can be in a region of the membrane between the keys, and the overlapping of the flanges obscures a view of at least one audio port opening.