An intuitive psychological understanding of sound is given by nature. Being aware of the meaning of sound often requires an identifying process of an ethical and physical explanation (propter hoc and post hoc). For an objective, scientific and ethical result, one has to investigate sound in the frames of psychoacoustic parameters. But objective psychoacoustics has to fulfill psychological criteria, discuss aesthetic evaluation as well as reflect physical sources. The tension arises between the subjective listeners, whose decisions of participation in the test are based on free will, and the researchers in acoustics, whose experiment setup is orientated to achieve independent results. Both parties are driven by empirical and metaphysical pragmatism and the awareness of the difference between subjectivity and objectivity. The discussion is held with respect to the gender, profession, age (childhood and elderly people) and nationality. With this information, the question arises how to get from an individual point of view to an overall perspective. For this purpose, the chair of Vibroacoustics of Vehicles and Machines of the Technical University of Munich is in the process of developing an open source psychoacoustic toolbox. The results will be analyzed in a systematic and objective method.