One of the most complaints of houses in apartment buildings, especially in city centers, is the road and street noises. Of course there are ways to prevent, or at least reduce, these unwanted voices that are one of the difficulties of living in the city: sound insulation! What kind of sound insulation is it, what types are there and how is it even more important? Here is our answer to all these questions! What we hear from our ears as sound is actually a type of physical energy that is created by the dispersion of a source of vibration in the air. This type of energy, which we can call a vibration, spreads in waves. Unlike water waves, sound waves that can be resembled water waves spread in invisible spherical waves. What can we do to get rid of unwanted voices? Click the source page.