Impact sound
Impact sound is a special form of structure-borne sound that is caused by the movement of people and animals on a floor .
Even sound , caused by exposure to common household objects on the floor, is treated as footfall, as corresponding sound transmission and impact. Relevant here are mainly washing and dishwashers standing on the ground, air handling units , night storage heaters with built-in fans and sanitary articles as well as manual handling of heavy objects such as furniture across the floor.
As footfall sound radiated to the space portion generated during the described operations is referred to noises. So walking noise is airborne and not structure-borne noise . As a rule, impact sound is also perceived as airborne sound, because after being transmitted as structure-borne sound through walls and ceilings, it is emitted as airborne sound.
A floor structure with screed is usually chosen for footfall sound insulation , supplemented by absorbing fiber boards, foams or fleeces. Where this is not possible, attempts are made to stop the path of the sound through other types of mass (e.g. paving slabs) and to decouple the various layers in the floor.
Reduction of impact noise
![](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Trittschallentkopplung_Fertigteilpodest_im_Treppenhaus.jpg/220px-Trittschallentkopplung_Fertigteilpodest_im_Treppenhaus.jpg)
In addition to thermal insulation and wind tightness, good sound insulation is now a key criterion for high-quality buildings. Noise nuisance, which occurs in the form of transmitted impact sound, can have a negative impact on health. Builders or residents have a fundamental, civil law justified claim to adequate noise protection, which is to be guaranteed by building laws and specified standards.
The better individual components are decoupled from one another, the better the impact noise can be contained. Double-shell walls with insulation in between, as well as floors with heat and sound-insulating screed, meet the protection against impact noise that is required today.
In stair construction, too, increasing importance has been attached to adequate sound insulation in the past few decades: To reduce impact noise, the use of soft, springy step coverings and a decoupling of the stair support points from the adjoining walls and ceilings are used. So-called whisper stairs are stairs that have particularly good footfall sound insulation .
Summary
Impact sound is generated as structure-borne sound and partially spreads as air-borne sound.
Web links
swell
- Basics of impact sound , University of Duisburg
Individual evidence
- ↑ As of 2013 treppenmeister.com