RD-1 | Research & Development | R 3 | 2023-11-08 | 14:30 - 15:30
Entwicklung eines modularen Studio-Lautsprechersystems mit optimiertem Zeitverhalten
RD-1-1 | Start 14:30 | Duration 30 min. | Dieter Leckschat |
Christian Epe | Talk (German)
Im Rahmen eines akademischen Projektes wurde ein Lautsprechersystem konzipiert, entwickelt und optimiert, welches den Anforderungen an ein professionelles Studiomonitoring-Setup genügt. Basis ist eine Dreiwegekonstruktion mit aktuellen hochwertigen Komponenten wie z.B. einem AMT-Hochtöner. Ein integrierter DSP übernimmt die in diesen Systemen üblichen Funktionen wie Frequenzweiche und Limiter. Besonderes Augenmerk wurde auf die Optimierung des Zeitverhaltens gelegt, so werden die Phasendrehungen der Frequenzweichenfilter vollständig ausgeglichen, bei minimaler Latenz. – In einem zweiten Schritt wird das Lautsprechersystem durch ein modulares Subwoofer-Setup ergänzt, welches sowohl in Monopol- als auch in Cardioid-Richtcharakteristik betrieben werden kann.
Instrumentenverstärkerabnahme unter Verwendung von MEMS-Mikrofonen
RD-1-2 | Start 15:00 | Duration 30 min. | Christian Epe |
Dieter Leckschat, Jan Willms | Talk (German)
Die fortlaufende Verbesserung von MEMS-Mikrofonen (Micro-Electro-Mechanical-Systems) bezüglich der erreichbaren elektroakustischen Parameter lassen diese auch im Studiobereich mehr und mehr in den Fokus rücken. So kann eine Mikrofonierung von Instrumenten und Instrumentalverstärkern nahezu unsichtbar, ohne störende Stative und dank des verbesserten Übertragungsverhaltens besonders klangtreu erfolgen. Im Rahmen eines akademischen Projektes wurden mehrere MEMS-Mikrofone in einen Instrumentenverstärker integriert und die positionsabhängigen, klanglichen Eigenschaften untersucht. Darüber hinaus erfolgte über einen DSP eine Weiterverarbeitung der MEMS-Signale, um klassische Studiomikrofone zu emulieren und bei Bedarf zu kombinieren. Der Vortrag stellt den Prototypen und die erreichten Ergebnisse vor.
RD-2 | Research & Development | R 3 | 2023-11-08 | 16:00 - 17:00
Physical acoustic characteristics of earphones and headphones required for the faithful reproduction of the original spatial impression of immersive binaural sound
Immersive sound has been developed for systems with multichannel loudspeakers arranged in three dimensions, such as the 22.2 multichannel sound system. Recently, more and more immersive sound content is being produced to be listened to with headphones and earphones so that the immersive sound content can be enjoyed in a simpler way. However, the differences between the spatial impression reproduced by multichannel loudspeakers and that reproduced by headphones or earphones have become a problem. Representative examples of research conducted to address this problem include the individualization of head-related transfer functions used in binaural rendering and head tracking. Meanwhile, there has been less research on the physical acoustic characteristics required for earphones and headphones that reproduce the immersive binaural sound. We therefore investigated the physical acoustic characteristics of earphones and headphones required to reproduce the spatial impression of binaural sound aimed at by immersive sound content as faithfully as possible, and we found desirable characteristics. Subjective evaluation experiments showed that earphones and headphones designed according to these characteristics reproduce the spatial impression of the sound content more faithfully than devices designed on the basis of other characteristics. This workshop will introduce the appropriate physical acoustics characteristics of earphones and headphones for immersive binaural sound listening with some demos.
RD-3 | Research & Development | R 13 | 2023-11-09 | 10:00 - 11:30
Auditory Envelopment and Affective Touch Hypothesis
RD-3-1 | Start 10:00 | Duration 30 min. | Thomas Lund | Talk (English)
Theoretical reason and qualitative evidence is given why auditory listener envelopment could have a stimulating effect on the human body, possibly akin to a more widely studied sensation, affective touch, originating from specialized nerve fibres in the skin. Physical reactions to listener envelopment could be one reason why music and singing has been performed under dedicated indoor settings for millennia.
Results from a pilot study are presented and discussed. A research agenda is proposed, to further study potential physiological responses when we experience enveloping sound, identified also as not threatening or friendly.
RD-3-2 | Start 10:30 | Duration 60 min. | Gottfried Behler |
Michael Makarski | Tutorial (English)
The focused development of high-quality loudspeakers requires the developer to keep an eye on a multitude of interacting influencing factors. The hierarchy of a development task is not always clearly defined. Depending on the requirements (application, size, cost, quality, appearance, clientele, etc.), very different approaches can be taken. However, if one may assume that the same physical, technical and acoustic boundary conditions apply in all cases, one can find generally valid criteria for a promising development. Here, especially the transformation of the 'one-dimensional' electrical signal into the 'three-dimensional' acoustic environment of the loudspeaker plays a significant role. Consequently, the directivity of a loudspeaker is a decisive feature for this transformation, which not least ensures a balanced sound image in the listening room (independent of the fact that the listening room itself has a decisive influence). This in turn depends on several other factors, such as the choice and arrangement of the transducers, the design of the loudspeaker cabinet with possible waveguides and, last but not least, on a correctly designed crossover with correct phase and amplitude responses. The article will deal with the essential criteria for a target-oriented development strategy, with special emphasis on the interaction between the components.