Soundproofing

Sound insulation refers to the obstruction of the spread of air - borne noise by spreading the sound is reflected at individual points of discontinuity. The sound insulation is the basis of building acoustics and is characterized by the sound reduction index R in dB, which indicates how little sound enters the next room.

The sound insulation is a measure for the acoustic isolation of different spaces, eg with TV or recording studios, against unwanted noise from neighboring rooms or from outside. One example is a sound-absorbing cabin practice for players in the sound passage at parting surfaces is prevented.

Associated with reflection measurements

The reflection is given as

• Sound reflection factor (ratio of the sound pressure of a reflected sound wave and the sound pressure of the incident wave ) or
• Acoustic reflectance

The larger the reflection factor, the more the sound insulating effect. This is achieved in practice by the largest possible impedance jump at the reflecting interface.

Impact sound insulation

A typical subject of architectural acoustics is the impact sound insulation. Impact sound is caused by structure-borne noise (steps, kicks, knocking), which in turn stimulates walls or ceilings for the radiation of airborne noise. An effective sound insulation can be achieved through structure-borne (floating screed ) or by luftschalldämmende measures ( suspended ceilings ).

Demarcation for silencing

The sound insulation has nothing to do with the required acoustic sound-deadening or sound-absorbing space within the individual. This describes how much sound energy is converted into heat and is a typical question of room acoustics.