Audio Communication Group


Anechoic chamber

In the large anechoic chamber of the TU Berlin, measurements are performed on sound sources (musical instruments, speakers, noise sources) that are not - as in normal rooms - influenced by sound reflections from the walls. The picture shows the measurement system developed by the department to measure head-related transfer functions (HRTFs) of the human ear.

3D Media Lab

In the 3D Media Lab, audiovisual reception experiments are conducted in virtual environments, with stereoscopic 180° panoramic projection and dynamic binaural synthesis.

Mixed Reality Design Lab

In the Berlin Open Lab (Lab 2, Mixed Reality Design), rooms are designed on the computer. The visual and acoustic impression can be experienced immediately through a selection of head-mounted displays (Varjo VR-2 Pro, HoloLens 2, HTC Vive, Oculus Rift), a 21-channel Higher Order Ambisonics speaker system for sound field synthesis and/or dynamic binaural synthesis.

Listening booth

In the listening booth, headphone-based audio-visual listening tests are conducted, for example, the evaluate the sound quality of 3D audio scenes. With an area of 6 square meters, a high attenuation of airborne ambient noise of 45 dB and a low reverberation time of 0.3 s above 500 Hz, the booth is also suitable for experiments that require a particularly low-noise environment.

Small Studio

The smaller of the two TU-Studios has two playback systems for spatial audio applications. The loudspeaker dome with 21 tweeters and two subwoofers enables the creation of three-dimensional sound spaces with playback methods such as Ambisonics or Vector Base Amplitude Panning (VBAP). A wave field synthesis system (WFS) with 192 channels is available for precise localisation within a two-dimensional plane at head height. Both systems are controlled by dedicated software that was developed by the group and is currently undergoing further research.

WellenFeld H 104

The WellenFeld H 104 auditorium and event hall at the TU Berlin has the world's largest wave field synthesis (WFS) system. Around the entire hall with a capacity of about 640 seats, a band of more than 2700 loudspeakers at a distance of 10cm stretches at head height. These are controlled by a computer cluster with 832 audio channels.

Large Studio

The large TU-Studio provides space for diverse projects in the field of experimental electronic music and media arts. Music interaction systems and artificial intelligence applications in real-time audio environments are explored in collaboration with artists. The studio is equipped with 20 flexibly controllable speakers as well as a classical stereo monitoring system. A modular synthesizer, the SynLab Spree system, is also part of the permanent installation. Among others, the Electronic Orchestra Charlottenburg rehearses in the large studio.