In order to feel good in the garden, peace and quiet and lots of green are the be-all and end-all. If the former is disturbed by street or neighboring noise, the former does not necessarily have to take a back seat. Because you can achieve a noticeable noise reduction not only with concrete, but also with plants.
Which plants offer noise protection
Plants don't have the very best physical properties for effective soundproofing. They are too permeable and not massive enough. A soundproof wall with its dense, heavy structure made of closed stone or woodwork has a significantly better soundproofing effect.
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Nevertheless, with clever planning, you can also achieve significant noise reduction with plants. To do this, the right plants must be selected and the right care must be taken to heart. According to a study by the Fraunhofer Institute for Building Physics from 2011, the following factors influence the noise protection effect of plants:
- The nature and structure of the foliage
- Density of growth
- Environment on the ground
Choose plants with round, fleshy, drooping leaves
With regard to foliage, it is primarily the shape, thickness and orientation that determine whether a plant is suitable for a noise protection hedge. Leaves that are as round as possible, as thick as possible and as perpendicular as possible to the impact of the sound are best. Ivy is therefore a great soundproof plant. But the institute also recommends the Wrinkled Snowball with its hanging, thick leaves. Rhododendrons or cherry laurel aren't bad candidates either. Trees with fine, horizontal leaves such as hornbeams or those with small leaflets such as privet are less suitable.
Keep it tight and compact
In order to maintain the sound-absorbing effect of a hedge in the long term, regular pruning is important. It is very unfavorable if the hedge thins out, which can easily happen, especially in the lower area. You can hardly close such places again afterwards. An annual cut promotes dense, tight foliage. This also applies to noise-absorbing balcony plants.
Sound absorbing floor environment
So that the soil around the hedge does not become a sound reflector, it should not be smooth and firm if possible. A tiled floor area is generally not a good idea if you want more peace and quiet in the garden. Lawn or densely structured ground cover such as ysander or periwinkle are more sound-absorbing and, because of the higher proportion of green, psychologically relaxing.