Geräusch (中性)

Description: 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.

Description: Sounds are noises that can be picked up by the auditory system. Sound that is perceived as disturbing or unpleasant is often referred to as Noise disturbance. In terms of physics, sound is a wave of mechanical deformation that is transmitted (propagates) through some medium. The specific speed at which it propagates and the form of the wave vary depending on the medium and its properties, such as the physical state of the matter, temperature and density. The pressure and density in the medium change during this process. Sound forms longitudinal waves in gases and liquids and transverse waves in solids (solid-borne sound). Compression energy (sound pressure) and Kinetic energy (sound particle Velocity in $v = m/s$) are transported as sound energy and converted into each other. The following formula shows how wave length $(\lambda )$, frequency $(f)$ and sound velocity $({c_s})$ are related: $\lambda = \frac{{{c_s}}}{f}$. Humans can hear sound frequencies from 16 Hz to 20 kHz. Lower frequencies are known as infrasound, higher frequencies as ultrasound. At a frequency of 2 kHz, the (frequency-dependent) limit of audibility lies at a Sound pressure level of 0 dB.