#69461The Construction Physics Research Institute uses this model for auditorium acoustic testsSign in or register,to downloadAdd to cartRemove from cartLocation: Moscow, RussiaEvent date: 01.02.1977Date published: 11.02.2005Author: A. BezrodnovCredit: SputnikSource: SputnikOriginal: 77-5360, 35 mm filmMedia: JPEG, 3000x2016px, 1.8MbAcoustictest