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Why is jet engine so noisy?
According to ScienceABC, people who live near the airport are more prone to stress, memory loss and even heart disease.
Muffler
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Articles about Muffler
2 published items.
New technology
The world's largest silencer for self-propelled guns and tanks
It is known that this giant silencer was used by the German military to limit the impact of the noise when firing on people in neighboring towns.