Conference Paper

Speech intelligibility measurements in a diffuse space using open and closed loop systems

  • November 2007
  • Conference: International Congress of Acoustics (ICA19)
  • At: Madrid, Spain
Authors:
Christos Nestoras at London South Bank University
Christos Nestoras
Luis Gomez Agustina
Luis Gomez Agustina
Luis Gomez Agustina
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Stephen Dance
Stephen Dance
Stephen Dance
  • This person is not on ResearchGate, or hasn't claimed this research yet.
Sal Murano
Sal Murano
Sal Murano
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... Results were compared in terms of reverberation times to establish the effect of the source type on the room response and assess the feasibility of substituting source types with alternatives when necessary, or simply when more practical to do so (also see [10,11]). Considering the measured data it can be deduced that the majority of the test rooms produced a primarily diffuse sound field for the higher frequency range, with the partial exception of room 10. Table 4 shows the standard deviation for the T 30 and EDT variation among the four source configurations as an average over all receiver positions in a room. ...
The Interrelationship Between Room Acoustics Parameters as Measured in University Classrooms Using Four Source Configurations
Article
Full-text available
This paper investigates the interrelation of room acoustics parameters as measured in lecture theatres/classrooms using four sound source configurations. Ten typical rooms were selected as representative of university premises and measured to ISO 3382 standards. The study focuses initially on the type of sound source used, to establish the suitability of multi source based measurements in assessing the acoustics of classrooms. Acoustic performance is then discussed in the context of the relationship between room acoustics parameters with and without significant background noise, with a particular focus on speech intelligibility. To facilitate a more efficient discernment of results, EDT, T30, Clarity indices and MTI were considered, as they are commonly included in general room acoustics assessments. Either of the source configurations was found to be suitable for performing general purpose measurements in (small) rooms. Clarity and EDT were found to be linearly related to the modulation transfer index in noiseless conditions, in line with earlier findings, thus an excellent predictor of STI. Background noise could be ascertained as of primary importance in the case of a non linear relation.
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