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This paper stresses the importance of the human user being tightly embedded within an interactive control loop for exploring data sets using sound. We consider the quality of interaction, and how this can be improved in computer systems by learning from real-world acoustic interactions. We describe how different sonification methods can utilise the human feedback loop to enhance the perception and analysis of the data under investigation. Some considerations are given regarding systems and applications.

The present paper provides an insight into the acoustic characteristics of one of the spaces used for the performance of the York Mystery Plays:S tonegate, as treet in central Yo rk (UK).A ne xperiment conducted in a controlled environment with the aim of determining the optimal method for acoustic measurements on this site is first presented. The methods tested were the Exponential Sine Sweep (ESS)m ethod with the application of time averaging of eight 15-second exponential sine sweeps and the ESS method with a9 0-second sine sweep. Results demonstrate the greater robustness under the test conditions of the ESS method when used with as ine sweep of 90 seconds in length. Results from measurements at Stonegate using this method are then discussed, demonstrating that the space has appropriate reverberation time and clarity values to ensure speech intelligibility butwould prove less satisfactory for the performance of the plainchant items that were part of the plays. Results also indicate that Stonegate presents lowlevels of spaciousness and high levels of listener envelopment at most of the receiverpositions studied. PACS no. 43.20.Ye, 43.28.Hr,43.55.Br,43.58.Gn 98 ©S.Hirzel Verlag · EAA Lopez et al.:S tudyofthe acoustics of Stonegate ACTA ACUSTICA UNITED WITH ACUSTICA Vol. 99 (2013)

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