一种定义
四种语言
0,1,2
- 德國
- 英語
- 中國
- 西班牙語
频率 (n)
Häufigkeit (f)
frequency (n)
The effectiveness of the sound insulation depends on the excitation frequency.
The ear is most sensitive to noise in the frequency range from 1 to 6 kHz.
The following formula shows how wave length , frequency and sound velocity are related: .
