Christoph Hohnerlein
Projects
Co-invented an oscillator algorithm that projects two-dimensional polygons into the time domain.
Progressive Web App that helps keeping score of the Doppelkopf card game.
Helped build 100 hand-held convolver for the 20th anniversary of the Red Bull Music Academy.
The sound_field_analysis toolbox is a Python port of the SOFiA toolbox for Matlab. It allows you to analyze, visualize and process sound field data recorded by spherical microphone arrays.
A mixed, array-based speaker system, where traditional LSFI beamforming and path estimation are simultaneously employed in their respective comfortable frequency range.
A method of generating musical waveforms which relies on sampling a variable polygon in polar space with a rotating phasor.
Interactive AV installation for ZHDK's Immersive Lab installation, featuring 360 deg projection, multi-user interaction and 16 channel spatialisation.
Designed and tested the hard/software of a prototype that delivers directional haptic cues to your hand to augment VR.
Investigated the perceived coloration of a synthesized point source presented by stereophony and Wave Field Synthesis using between 14 and 3584 speakers.
Publications
[1] X. Ma, C. Hohnerlein, and J. Ahrens, ‘Concept and Perceptual Validation of Listener-Position Adaptive Superdirective Crosstalk Cancellation Using a Linear Loudspeaker Array’, J. Audio Eng. Soc., vol. 67, no. 11, pp. 871–881, Nov. 2019, doi: 10.17743/jaes.2019.0037. Link
[2] X. Ma, C. Hohnerlein, and J. Ahrens, ‘Listener-Position Adaptive Crosstalk Cancelation Using a Parameterized Superdirective Beamformer’, in 2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop (SAM), Sheffield, 2018, pp. 114–118, doi: 10.1109/SAM.2018.8448471. Link
[3] C. Hohnerlein, M. Rest, and J. Parker, ‘Efficient Anti-Aliasing Of A Complex Polygonal Oscillator’, in Proceedings of the 20th International Conference on Digital Audio Effects, Edinburgh, UK, 2017. PDF
[4] S. Möller et al., ‘A cross-university massive open online course on communication acoustics’, The Journal of the Acoustical Society of America, vol. 141, no. 5, pp. 3556–3556, May 2017, doi: 10.1121/1.4987538. Link
[5] J. Ahrens, C. Hohnerlein, and C. Andersson, ‘Auralization of acoustic spaces based on spherical microphone array recordings’, The Journal of the Acoustical Society of America, vol. 141, no. 5, pp. 3512–3512, May 2017, doi: 10.1121/1.4987367. Link
[6] C. Hohnerlein and J. Ahrens, ‘Perceptual evaluation of a multiband acoustic crosstalk canceler using a linear loudspeaker array’, in 2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), New Orleans, LA, 2017, pp. 96–100, doi: 10.1109/ICASSP.2017.7952125. Link
[7] C. Hohnerlein and J. Ahrens, ‘Spherical Microphone Array Processing in Python with the sound_field_analysis-py Toolbox’, presented at the 43. Jahrestagung für Akustik, Kiel, Germany, 2017. PDF
[8] C. Hohnerlein, M. Rest, and J. Smith, ‘Continuous Order Polygonal Waveform Synthesis’, presented at the 42nd International Computer Music Conference, Utrecht, 2016. PDF
[9] R. Mehra, C. Hohnerlein, D. Perek, E. Gatti, R. DeSalvo, and S. Keller, ‘HapticWave: directional surface vibrations using wave-field synthesis’, in ACM SIGGRAPH 2016 Emerging Technologies on - SIGGRAPH ’16, Anaheim, California, 2016, pp. 1–2, doi: 10.1145/2929464.2929469. Link
[10] C. Hohnerlein, ‘Beamforming-based Acoustic Crosstalk Cancelation for Spatial Audio Presentation’, MA Thesis, Technical University of Berlin, 2016. PDF
[11] H. Wierstorf, C. Hohnerlein, S. Spors, and A. Raake, ‘Coloration in wave field synthesis’, in Audio Engineering Society Conference: 55th International Conference: Spatial Audio, 2014. Link
[12] C. Hohnerlein, ‘Coloration of virtual sources in Wave Field Synthesis for different loudspeaker spacings’, BA Thesis, Technical University of Berlin, 2013. PDF
Patents
NR Clark, CO Hohnerlein - Systems and methods for limiter functions. Mimi Hearing Technologies GmbH. US2022038062A1 & EP3940954A1 (published 2022-01-19).
NR Clark, CO Hohnerlein - Systems and methods for processing an audio signal for replay on stereo and multi-channel audio devices. Mimi Hearing Technologies GmbH. US10547927B1 / US2020037057A1 & EP3599775A1 / US10547926B1 / US2020037056A1 (published 2020-01-29).
SJ Keller, TT Trutna, R Mehra, CO Hohnerlein, E Gatti (…).- Transversal actuator for haptic feedback. Oculus VR LLC. US 9778746 B2 (granted 2017-03-10), US 9971410 B2 (granted 2018-05-15).
SJ Keller, TT Trutna, R Mehra, CO Hohnerlein, E Gatti (…) - Haptic surface with damping apparatus. Oculus VR LLC. US 9851799 B2 (granted 2017-12-26).