In an effort to improve the comfort, the students’ cafeteria at the architectural college of Madrid, ETSAM-UPM, was acoustically treated. Dr. César Diaz and his team at ETSAM-UPM, grabbed the opportunity to make measurements before and after, to quantify the improvement.
Results showed that a large reduction of the reverberation time (from 2.3s to 0.8s) and an increase of speech clarity (D50 from 25 to 65%) was achieved.
The average active noise level dropped from 75 to 69 dBA – a very noticeable difference for the users of the space, as can be seen from the testimonials in the video that was made, were the users of the space give their view on the difference before and after.
