Hallo,
es wäre ganz lieb, wenn mal einer über den Text schauen und ipps zu Grammatik und Rechtschreibung geben würde.
In high populated and industrialized regions, big parts of the people suffer from noise, which is caused in the environment. Main sources are highways, trains and plains. There’re two methods to limit the noise pollution:
- noise avoidance: sets at the source
- noise protection: protect people against existing sources
Noise avoidance is more common than noise protection, because it’s cheaper to dam a jets engine as every single house in a city.
The sound wave characteristics are used in the noise protection. They’re very good reflected from hard materials. The spreading of the waves could be dam with good windows. These special windows could reduce the noise up to 50 decibel.
There is a law, how much noise a vehicle is allowed to cause. The vehicle noise could be reduced with dammed engines. The engine consists of hard material, which reflects the sound into the inside. Also noise protection walls and noise-reduced streets had been built.
Danke Foofth
Text, bitte helfen
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- Slow Speller
- Beiträge: 21
- Registriert: 13. Jan 2006 00:11
-
- Slow Speller
- Beiträge: 21
- Registriert: 13. Jan 2006 00:11