Audio Examples for Acoustical Adverse Conditions

There are three kinds of audio demonstrations in the "adverse conditions" section:

  1. A table with offline-generated playable sounds demonstrating the effects of noise and reverberation on the intelligibility of speech. The table contains speech in seven languages in four conditions: in quiet, with noise, with moderate reverberation, and with strong reverberation. These audio examples were pre-processed with the professional room acoustics simulation software “ODEON” (Christensen, 2005).
  2. A simple room acoustic demo offering a limited set of speech and noise source positions in a room whose size and degree of reverberance can be set to two different settings. Apart from the sounds that can be listened to for each selected condition, corresponding BSIM predictions of the respective speech intelligibility are provided in that demo. The focus of this demonstration is on the binaural gain that can be observed in adverse listening conditions with spatially distributed sound sources. These audio examples were pre-processed with the auralisation software “tinyAVE” (Borß and Martin, 2009).
  3. An interactive auditory virtual environment. Here, a Java applet allows configuring a virtually unlimited number of complex spatial conditions by setting arbitrary listening directions (head orientations) and positions of up to three independent sound sources in a room. An additional ambient noise can be activated optionally. The size and the damping of the simulated listening room can be chosen from lists of three possible settings to vary the reverberation time. The resulting sound is computed in realtime by the latest Internet version of the AVE generator “IKA-SIM” (Silzle, Novo, and Strauss, 2004).


Borß, C. and Martin, R. (2009). “An Improved Parametric Model for Perception-Based Design of Virtual Acoustics,” 35th int. AES Convention, London, UK, (accepted for publication).
Christensen, C. L. (2005). “ODEON,” Room Acoustics Modelling Software (v8.0), ODEON A/S, (date last viewed 07/31/08).
Silzle, A. and Novo, P. and Strauss, H. (2004). “IKA-SIM: A System to Generate Auditory Virtual Environments,” 116th AES Convention, Berlin, Germany.