manillaboncina by rodrigo garcia from spain

There are a lot of doors in shops with complex photoelectric systems that with infrared motion detector activate a polyphonic alarm that make a “dongdong”. All this technology just to advise to the storekeeper that some one has entered into his shop.
It will we much more easier if the door handle will advice directly the storekeeper. To make this possible we use a traditional horn.
In the outside of the door We will put the rubber bulb that when some one turn the handle, the air will make a sound thanks to the trumpet that is in the inside.