A head separated type imaging apparatus includes a head unit and a main unit which are separated, the head unit imaging a subject and the main unit processing an imaging signal transmitted from the head unit. Certain of these proteins interact with the androgen receptor in an androgen-dependent manner, whereas certain proteins may induce transcriptional activation in the presence of other ligands, such as E2 or HF. The system can detect that a first electronic device has paired with a second electronic device via a peer-to-peer device pairing connection. The feature extractor receives an audio signal and extracts recognition features.