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Doorbell It is a concept with various uses. It can be about device which allows to make a notice or to call to someone through a sound intermittent type. For example: "I have been ringing the bell for ten minutes ... I think there is no one in the house", "Press the bell so the janitor comes", “Juana, they are ringing the bell! Don't you hear it? Go to the door and see who it is ”.

In most homes, a electric bell at the entrance door. In this way, when a visitor arrives, he rings the bell to give notice to the owners of the home . This type of bell has a electrical circuit which allows, when someone presses the switch, generate an audible signal.

In this sense, we cannot forget the fact that the bells have changed significantly in recent decades thanks to technology. Exactly what has happened is that the development of the same has allowed now the simple bells of before, and that still remain in many homes around the world, have evolved into what is known as video intercoms. These are devices with which the visitor can indicate to the owner of the house that he is there while he can see the person who is at the door of his house through the camera they have incorporated.

Also, it should be stressed that there are bicycles with bells installed on the handlebars. Thanks to these, what is achieved is that the person who is driving said two-wheeled vehicle can, for example, notify a pedestrian who crosses in order to avoid running over him.

The concept of timbre, on the other hand, is used to name the sound quality according to the nature and form of what vibrates. In the field of acoustics , the characteristic nuance of the sound is called timbre, while in singing it refers to the specific spectrum of the voice : “This woman has a wonderful voice bell”, "The orchestra has an extraordinary double bass", “The timbre of this instrument is very particular”.

The bells can also be different kinds of seals , Like the stamps or stamps and the stamp that verifies the payment of a document: "The government increased the cost of stamps", “I can't find any bell in this envelope”.

In this sense, we cannot forget that in Spain there is what is known as the National Mint and Stamp Factory, which was put into operation in 1893 as a result of the “unification” of the Mint and the Seal Factory . Currently among its products are from collection and circulating coins to banknotes through security paper, medals, identification documents, cards and graphic products. This last group includes university degrees, postage stamps or items that are related to gambling such as tenths of lottery.

For the heraldry Finally, the bell is a badge that is used in a shield of weapons to indicate the noble degree of the one who has it.

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