Supplementary Material for "Real-time Auditory Contrast Enhancement"

Every day, we rely on the information that is encoded in the auditory feedback of our physical interactions. With the goal to perceptually enhance those sound characteristics that are relevant to us – especially within professional practices such as percussion and auscultation – we introduce the method of real-time Audi- tory Contrast Enhancement (ACE). It is derived from algorithms for speech enhancement as well as from the remarkable sound processing mechanisms of our ears. ACE is achieved by individual sharpening of spectral and temporal structures contained in a sound while maintaining its natural gestalt. With regard to the targeted real-time applications, the proposed method is designed for low latency. As the discussed examples illustrate, it is able to significantly enhance spectral and temporal contrast. ### Sound examples #### **ACE of impact Sounds** ##### **S1.1_knock-knock.wav** see article for further details. ##### **S1.2_knock-knock_LI.wav** see article for further details. ##### **S1.3_knock-knock_LI+EX.wav** see article for further details. ##### **S1.4_knock-knock_LI+EX+DP.wav** see article for further details. ##### **S1.5_knock-knock_TCE.wav** see article for further details. ##### **S1.6_knock-knock_LI+TCE.wav** see article for further details. ##### **S1.7_knock-knock_LI+EX+TCE.wav** see article for further details. ##### **S1.8_knock-knock_LI+EX+DP+TCE.wav** see article for further details. #### **ACE of machine sounds** ##### **S2.1_machine.wav** see article for further details. ##### **S2.2_machine_EX.wav** see article for further details. ##### **S2.3_machine_TCE.wav** see article for further details. ##### **S2.4_machine_EX+TCE.wav** see article for further details.