The sounds can come from doorbells, smoke alarms, telephones, or alarm clocks. The hearing dogs may work outside their owner's home and be trained to hear sounds like sirens, forklifts and a person calling the owner's name. They may also be taught to respond to and/or lead away from a sound: For example, in the case of a fire alarm, the dog will usually drop to the floor, instead of leading the owner towards the alarm, which would be dangerous. 