Classroom Acoustics Auralization
The following auralization was developed to show the effects of noise and reverberation on speech intelligibility in classrooms. In the auralizations, background HVAC noise at an appropriate level was added to a reverberant speech signal.
| Classroom with a speech-to-noise ratio of 0 dB and a 1.5 second mid band reverberation time | |
| Classroom with a speech-to-noise ratio of 15 dB and a 0.5 second mid band reverberation time |
These auralizations were created using a
nearly anechoic children's
audio book recording and HVAC noise measured in a classroom.
Reverberation was added to the speech signal using the Full
Reverb
effect in Adobe Audition was added to the noise in Adobe Audition. The audiobook was recorded by
Franny Joyce for the Project Gutenberg who owns the copyright for this work.
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These animations, auralizations, and visualizations are © 2006 by
Ralph T. Muehleisen and are licenced under a
Creative Commons Attribution-NonCommercial 2.5 License.
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