Design and construction 33 Electronic security systems 33 Dwellings 12 Security measures 12 Security systems 12 Electronic circuits 4 2 Active noise and vibration control 2 Automatic control 2 Closed-circuit television 2 Digital techniques 2 Electronic noise 2 Home automation 2 Programmable controllers 2 Pyroelectric detectors 2 Signal processing 2 Statistical methods 2