Three different kinds of music were utilized to address the question whether sound exposures with different frequency and time structures may differ in their potential danger to the human hearing. In Test Series I (TS I), 10 test subjects (Ss) were exposed to a medley of typical Heavy Metal Music with an exposure level of 94 dB(A) for 1 hour (h). This exposure had been used in a previous study and served as reference or basis for comparison. The exposure in TS II was also 94 dB(A) for 1 h and consisted of a compilation of so-called Techno Music from the 2001 “LOVEPARADE” in Berlin. In TS III, the test subjects were exposed to representative Classical Music at 94 dB(A) for one hour. Contrary to previous studies in which Classical Music containing passages with string instruments had already been compared to Heavy Metal Music, in the Classical Music exposure of this study compositions with dominant brass passages were used. The exposures' physiological responses were measured via the hearing threshold shifts within 2 minutes after the end of the exposure (TTS₂) and during the restitution course until the resting hearing threshold was once again reached (t(0 dB)). Additionally, the area underneath the restitution curve, the Integrated Restitution Temporary Threshold Shifts (IRTTS), was determined as a summary measure of the “physiological costs.” Consistent with previous studies, it could once again be shown that an energy equivalent rating of sound exposures can lead to dangerously wrong assessments. For example, while Techno Music led to IRTTS-values which were comparable to those from Heavy Metal Music as reference exposure, the characteristics of the strain level and the restitution course were completely different. Techno Music caused significantly lower TTS₂-values. This positive effect, however, was completely negated by a substantially prolonged restitution time (t(0 dB)). With respect to Classical Music, the results of the previous study could be confirmed despite the compositions' different instrumentation. Again, the IRTTS-values as indicator of the physiological costs of Classical Music amounted to only ¼ of those from Heavy Metal Music, even though none of the Ss had indicated Classical Music as his favorite kind of music. Of course, the risk of long-term hearing damage increases if the hearing experiences daily threshold shifts due to noise in the workplace which coincide with restitution processes which have not yet completely subsided. Furthermore, the acoustic stress from Techno and Heavy Metal Music is typically much higher than 94 dB / 1 h, the limit in this test which was chosen for ethical reasons.