Arno room at Aalto's campus in Otaniemi (IMAGE) Aalto University Caption The walls of the Arni room have rotating panels. A spherical loudspeaker plays sound in all directions, and the acoustic properties can be measured with several microphones at the same time. Credit Karolina Prawda / Aalto University Usage Restrictions May be used in publications related to this release with appropriate credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.