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Jose Cucharero, Tuomas Hänninen and Tapio Lokki
Sound-absorbing materials are usually measured in a reverberation chamber (diffuse field condition) or in an impedance tube (normal sound incidence). In this paper, we show how angle-dependent absorption coefficients could be measured in a factory-type s...
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Jose Cucharero, Tuomas Hänninen and Tapio Lokki
The reverberation of a room is often controlled by installing sound absorption panels to the ceiling and on the walls. The reduced reverberation is particularly important in classrooms to maximize the speech intelligibility and in open-plan offices to ma...
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Hassan Azad, Julie Meyer, Gary Siebein and Tapio Lokki
This paper presents an investigation of the effects of relatively large-scale pyramidal and convex-shaped diffusers on the acoustical properties of a small non-diffuse rectangular room. Room impulse responses (RIRs) were measured in various room configur...
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Tapio Lokki and Jukka Pätynen
The purpose of this paper is to spark discussions on the recent trends of designing vineyard and surround-type concert halls. We understand that these halls could be architecturally unique and many conductors like them, however, as outlined in this paper...
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Lokki, T. Savioja, L. Vaananen, R. Huopaniemi, J. Takala, T.
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