Vents can be added to these devices to reduce their contribution to the occlusion effect. Examples of these devices abbreviated CROS and BiCROS help alleviate adverse effects caused by a “single-sided” form of one condition. These devices, which have an open-fit type, are prescribed in the most common treatment used to slow the progression of presbycusis. “Anchored” kinds (15[1])of these devices are typically surgically inserted into the (*) mastoid and collect vibrations induced by bone conduction. (10[1])The receivers of BTE kinds (10[1])of these devices are designed to “hook” the top of the auricle of their users. Like cochlear implants, these (10[1])devices can be used to mask external signals received during tinnitus. For 10 points, name these devices that amplify signals entering the ears of deaf people. ■END■