Sound insulation is necessary to provide rooms offering to their occupants an appropriate acoustic comfort.

soundproofing insulation
Sound insulation is necessary
   

In France, the weighted standardized level difference between rooms DnT,A is an indicator of performance (expressed in dB) which must be equal to or greater than imposed limits depending on the nature of the building and depending on the use of the rooms considered.

In constructions subject to the Order of 30 June 1999 on the acoustic characteristics of residential buildings, the weighted standardized level difference between rooms is regulated.

  • for an emission room such as a room in a dwelling other than individual garages, a common circulation inside the building, an individual garage of a dwelling or a collective garage, a business premises, excluding collective garages
  • for a reception room such as a main room, a kitchen or a shower room

Depending on the combination of emission room and reception room, the performance indicator in terms of sound insulation explicitly required varies from 37 to 58 dB.

In establishments subject to the Order of 25 April 2003 on the limitation of noise, weighted standardized level difference between rooms is regulated.

In particular, in educational institutions:

  • for an emission room such as a teaching room, a room for practical activities, for administration, a medical room, an infirmary, a low noise workshop, a kitchen, a closed gathering room, a meeting room , sanitary facilities, stairwell, horizontal circulation, closed cloakroom, music room, multipurpose room, sports hall, dining room, noisy workshop
  • for a reception room such as teaching room, a room for practical activities, administration, a library, a documentation and information center (DIC), a music room, a meeting room, a teachers' room, a noisy workshop, a medical room, an infirmary, a multipurpose room, a dining room

Depending on the combination of emission room and reception room, the performance indicator in terms of sound insulation explicitly required varies from 30 to 55 dB.

In particular, in health facilities:

  • for an emission room such as a place of lodging and care, a room of examinations and consultations, a medical and nursing office, a waiting room, a room of operations or obstetrics, a work room, an internal circulation, or other premises
  • for a reception room such as an operations or obstetric room, a work room, a room for accommodation and care, an examination and consultation room, a waiting room, a medical and care office and other premises where patients may be present

Depending on the combination of emission room and reception room, the performance indicator in terms of sound insulation explicitly required varies from 32 to 47 dB.

In particular, in hotels:

  • for an emission room such as a neighboring room, a bathroom of another room, an internal circulation, an office, a restplace for the personnel, a closed cloakroom, a reception hall, a reading room, a meeting room, a workshop, a bar, a shop, a kitchen, a garage, a car parking, a closed delivery area, a gymnasium, an indoor swimming pool, a restaurant, collective toilets, a television room, a launderette, a local garbage, a casino, a reception room without amplified sound, a health club, a games room, a disco, a dance hall
  • for a reception room such as a bedroom or a bathroom

Depending on the combination of emission room and reception room, the performance indicator in terms of sound insulation explicitly required varies from 38 to 60 dB. In addition, there are regulatory provisions regarding exposure to aerodrome noise.

For all buildings, the standard NF S 31-057 - Acoustics - Verification of the acoustic quality of buildings (October 1982) or other opuscules may be reference documents for in situ measurement of performance in terms of sound insulation.

ITS can perform such acoustic measurements and, if necessary, propose solutions to improve an existing situation, if it is unsatisfactory in terms of sound insulation e.g. due to a non-compliance.