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Author: Bergner, J. ×

Publications Search Results

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  • Publication
    Quantitative investigation artificial room simulations reproduced by channel-based and object-based surround sound systems
    ( 2017)
    Camilleri, B.
    ;
    Bergner, J.
    ;
    Sladeczek, C.
    The introduction of object-based audio reproduction comes along with new challenges for the sound engineer to record, design and synthesize reverberant sound fields due to the increased number of speakers and the placement of such. The aim of this paper is to show that several parameter settings from a digital reverberation unit produce contrasting reflectograms in a 5.0 channel-based setup and an object-based setup which can have effects on the perceived reverberant sound field. Conversely, established acoustical metrics derived from the measured room impulse responses (RIRs) in both multichannel reproduction setups do not highlight the differences noticed in the reflectograms. The potential consequences regarding individual system properties and the metrics themselves are discussed in this work.
  • Publication
    High-directional beamforming with a miniature loudspeaker array
    ( 2016)
    Beer, D.
    ;
    Bergner, J.
    ;
    Wolf, M.
    ;
    Franck, A.
    ;
    Sladeczek, C.
    ;
    Zhykhar, A.
    Practical electroacoustic applications often demand a directional behavior of the dedicated loudspeaker setup. A common goal in sound reproduction applications is a uniform distribution of sound pressure over the listening area. A desired application in sound reinforcement is to focus the emitted sound to a defined region, to locally enhance speech intelligibility in reverberant environments or to keep high sound pressure levels on certain areas. The use of loudspeaker arrays with dedicated signal processing is a well-known technique to create directional radiation characteristics. This technology, often termed as loudspeaker beamforming, allows controlling the radiation of sound to a distinct direction. For decades directional sound radiation is used in public address systems. In recent years similar requests came up for other markets like home entertainment. Due to the size of conventional speaker systems, the usage in this field is still not feasible. This paper presents the design of a miniature beamforming array. The presented concept shows an array that consists of a small number of loudspeakers, while providing a high directional radiation behavior.