Violin tests in anechoic chamber. Tests of vibrations and sound quality are carried out in the anechoic room at the Violin Making International School of Cremona (Scuola Internazionale di Liuteria Cremona), in Cremona, Italy. The arrangement of the tiles minimises echoes (the reflection of sound waves), providing the conditions needed for acoustic tests. Cremona has been famed for centuries for its production of high-quality string instruments.