Acoustic dish - 2 pcs
Exhibit to demonstrate air transmission of speech.
Two metal dish mounted on metal stands. Exhibit to demonstrate air transmission of speech. In the focus of parabolic the sound waves are concentrating. At a small distance even the whispering may be heard.
Accessories: 2 pcs-stage steps.
Material: metal, plastic, wood (steps).
Dimensions: 100 x 100 x 50