People ask what does a hearing dog do?

A hearing dog is a specific type of assistance dog specifically selected and trained to assist people who are deaf or hearing impaired by alerting their handler to important sounds, such as doorbells, smoke alarms, ringing telephones, or alarm clocks. They may also work outside the home, alerting to such sounds such as sirens, forklifts and a person calling the handler's name
Training
Dogs that may become hearing dogs are tested for proper temperament, sound reactivity, and willingness to work. After passing initial screenings, they are trained in basic obedience and exposed to things they will face in public such as elevators, shopping carts, and different types of people. Only after that period of socializing are they trained in sound alerting.
Hearing dogs may be trained professionally in as little as three months, though many are trained for closer to a year. Generally, training involves getting the dog to recognize a particular sound and then physically alert or lead their handler to the source. They may also be taught to physically alert to and/or lead away from a sound, such as in the case of a fire alarm. While many hearing dogs are professionally trained, there is a growing number^{[citation needed]} of deaf or hearing-impaired individuals who undertake the challenge of training their own hearing dogs.