Phono insulating glass

Douglass phon - Soundproof glass

The sound isolation solutions of  Sav 2000 allow you to create more comfortable environments from the point of view of acoustic insulation and therefore less chance of  the disturbance from external noise sources.

This peculiar feature is made possible by a special machining process, given by the assembly of two or more glass sheets joined together with a PVB plastic film absorbing vibrations caused by noise.


  • Reduction of propagation of noises from external air and impact noise;
  • Ideal application in contexts that are subject to noise pollution (eg sites close to busy roads or railway lines);
  • Improves the quality of life and home comfort by eliminating noise, source of stress and disorder for activities that need concentration.

Funzionamento vetro fonoisolante

Italian rules and regulations

The DPCM OF 05/12/1997 regulations impose maximum values regarding noise levels coming from indoor sources within the buildings and maximum respect of all passive noise requisites regarding all components in function so as to reduce to minimum any type of human exposition to noises.

Category Destination
A Residence and similar
B Offices and similar
C Hotels and guesthouses
D Hospitals, clinics, old age homes
E School activities on all levels
F Recreational and cultural activities
G Destination commercial activities 

Furthermore, the decree defines 5 parameters through which the acoustic characteristics should be evaluated within buildings by keeping also into consideration all indoor plant noises, the phono insulating capacity of all horizontal and vertical walls:

Parametri Caratteristiche acustiche
R'w (dB) Acoustic insulation of all separating elements (vertical part.) between distinct inhabitances
D2m,nT,w (dB) Façade acoustic insulation
L'n,w (dB) Trampling path noise level
LAeq (dB) Sonorous level produced by indoor plants continuously in function
LAsmax (db) Sonorous level produced by indoor plants in function discontinuously

The parameters and categories define a table where limited values are indicated and which must be followed by various building components:

Categories R'w (dB)
D2m,nT,w (dB) L'n,w (dB) LAeq (dB) LAsmax (db)
D 55 45 58 35 25
A, C 50 40 63 35 35
E 50 48 58 35 35
B, F, G 50 42 55 35 35