Removable attachment of a passive transcutaneous bone conduction device with limited skin deformation

A bone conduction device, comprising:

• an external component including a vibrator configured to vibrate in response to a sound signal to evoke a hearing percept via bone conduction, wherein
• the external component is configured to output respective vibrations from at least two surfaces opposite one another, the respective outputted vibrations being effectively substantially the same as one another.

A bone conduction system, comprising:

• a first bone conduction device of a first type configured to evoke a hearing percept within a first frequency range;
• a second bone conduction device of a second type different from that of the first type and configured to evoke a hearing percept within a second frequency range, the second frequency range being a range including frequencies higher than the first frequency range.