He prowled around the room, placing sensors in advantageous positions. The helmet would blind him to the room, and the sounds transmitted through it might overwhelm his natural hearing. Since he did not wish to be surprised, the sensors were necessary to warn him of any intrusion. Jenny would be watching his precautions through a concealed video pickup, but that didn't matter. She would have to understand that he also had to exercise prudence. Satisfied that he would have notice of anyone entering the room, he settled into the chair and lifted the helmet.