The aim of the report is to investigate the effects of waviness on the acoustics behavior of gear pairs.In this paper, an analytical model is used to explain the effects in theory.Afterwards the FE-based tooth contact analysis software ZAKO3D is used to calculate the behavior in detail.Key takeaways are, that a difference between βb and βw does not immediately lead to a reduction of the amplitude of the waviness order.The effect depends on the wavelength and the tooth width.Also, it is shown, that there are cross influences between width crowning and waviness. V. Investigation of the Influence of Waviness on the Excitation Behavior of Gears in the Tooth Contact Analysis-Christian Westphal M.Sc.