Clearly, a standard doorbell will not function effectively when in the home of a deaf person. However, there are a variety of products available for deaf people to use in the place of traditional doorbells. These products use light and vibration--and loud sounds for those who are not entirely deaf--in helping to alert a deaf person that someone is at the door.
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Light doorbells, or visual alerting devices, use light to alert a person that someone is at the door. These doorbells range from a single light connected to the doorbell to a more elaborate system that flashes all the lights in the house. These doorbells are either activated by a doorbell button or a door knock alert system. With a door knock alert system, when someone knocks on the door a vibration sensor unit detects the vibration caused by the knocking and thus signals a bright light to flash. The vibration sensor is usually adjustable on a door knock alert system, so the level of vibration that triggers the alert is determined by the person using it.
For someone who is not entirely deaf but can't hear a regular doorbell, a radio doorbell might be the answer. Radio doorbells send out signals that trigger speakers throughout the house or apartment. These speakers then make a loud noise to alert the person that someone is at the door. Like Light doorbells and door knock alert systems doorbells, radio doorbells are generally wireless devices. They are also probably the most affordable option of deaf-oriented doorbell.
Modified traditional doorbell
If you'd prefer not to purchase a completely new doorbell system, there are companies that make devices that will work with existing doorbells. Many of these require rewiring. When dealing with installing a new doorbell system or altering an existing one, it's always a good idea to contact a certified electrician to help with the project. On top of being a safe option, electricians can often offer expert advice that will make the process simpler, faster and potentially less damaging to the infrastructure.
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