Azoreans have two small fins with four spines to act as ears. These fins detects sound vibrations both underwater a lot better then in the air, but it still catches some of the vibrations to an extent. They might not be able to hear 'whispers' very well.. if at all, but they could still hear normal voices alright. The fins themselves have nerves that connect directly to the 'hearing' portion of the brain. This allows them to distinguish different sounds, voices from sounds, etc. More nerves are found in the front of the fins, and thus are easier to 'hear' things from the front then to the sides and definitely from behind. These fin-ears are also highly sensitive to the touch. They are easily damaged if tugged upon hard enough, but a light pull will only make the Azorean squeak in pain.