A.E. Isaev, A.S. Nikolaenko, A.M. Polikarpov FSUE “VNIIFTRI”, Mendeleevo, Moscow regionisaev@vniiftri.ru Al’manac of Modern Metrology № 4 (20) 2019, pages 54–122 The acoustic properties of the recorder are investigated in this work. The mass-dimensional model of the recorder and the advantages of the proposed design are described, the results of experiments at low frequencies are … Continue reading Experimental research of the mass-dimensional model of the recorder