Imagine if time travel were possible and one could experience the future, i.e. to see and hear an urban or rural environment, which does not exist yet. In fact, this is possible with the tech-nology of Virtual Reality. In virtual reality, almost any environ-ment can be experienced auditory-visually, even if it is in the future. It goes without saying that a halfway correct description of the environment is a very big challenge. But once all charac-teristics of the environment and the sound sources have been specific and implemented, the task of technical realization still remains. This requires a complex Virtual Reality (VR) technology, namely a display device for visual presentation (“3D glasses”) and a 3D audio playback technology (“surround sound technology”). The point is that with technology, both 3D viewing and 3D listen-ing are available in virtually every home. Smartphones already provide rudimentary approaches. Head-Mounted Displays (HMD) have arrived on the computer games market and at corre-spondingly affordable prices. Binaural playback via headphones is both old-fashioned and once again the focus of current re-search when it comes to perfected individualized solutions. The technology is basically available, what do we do with it now? First of all, acoustics in research and practice and also interdisciplinary research with other sciences! Before the introduction to the acoustic-technical basics of virtual acoustics, here is a look at examples: VR technology can be used to plan runways or flight routes near airports. The major challenge here is to characterize the generation of aircraft noise with sufficient accuracy and to generate sound source signals from this, which then reach the receiver via models of atmo-spheric sound propagation. This application will be discussed in more depth below.