一种定义
四种语言
Sie decken Türspalte ab, um Luftströmungen, Staub- und Lärm abzuhalten.
Bei sehr hohen Lärmpegeln kommen meist noch Vibrationsbelastungen hinzu.
Dichtungen in allen Türöffnungen verhindern Lärm- und Partikelemissionen.
For example, rooms can be separated acoustically using special insulation designed to muffle footfall noise.
The ear is most sensitive to noise in the frequency range from 1 to 6 kHz.
Their features include low noise, low maintenance and low play.
The effectiveness of the sound insulation depends on the excitation frequency.
The following formula shows how wave length , frequency and sound velocity are related: .
Measurements can also be taken at the source of the sound.