Decibels measure intensity. If you whisper in an empty room it will measure between 0 and 1 db. This indicates the intensity of sound is minimal. This is considered the threshold of hearing.
A sound that measures 30 decibels is a 1000 times louder than the the threshold of hearing. An example of this is the noise of a regular computer produces between 20-40 dB.
Explanation:
El calendario solar azteca es un ciclo de 52 años que se divide en cuatro trecenas de años, cada uno diferenciado de los otros mediante la asignación cíclica de uno de los jeroglíficos Técpatl (pedernal), Calli (casa), Tochtli (conejo) o Ácatl (carrizo) y uno de los dígitos del 1 al 13 (representados con puntos).
<span>Still photography changed the entire course of visual contact . For the first time people could see the reality of another place. The civil war was the first widely photographically documented war, and the pictures of the bodies were more powerful that words could ever be. With pictures, people could see the world without traveling it, they could see people without ever meeting them. As technology grew, bringing motion pictures, and color film, the world became a smaller place in terms of being able to see it, but a much larger place in knowing what there was in it.</span>
