| 摘要 |
FIELD: education, physical instruments. SUBSTANCE: device has sound oscillator, which output is connected to source emitter, and serial circuit of sound receiver, reference oscillator, mixer, amplifier, light indicator. Sound receiver and light indicator are located on moving unit. Frequency of reference oscillator slightly differs from sound frequency. In addition device may have several sound receivers each of which is connected to its own mixer, amplifier and light indicator. All mixers are connected to same reference oscillator. Moving unit may be designed as resilient plate which one end is fixed and another one carries receiver and low-inertial indicator. Sound receiver and light indicator are mounted for movement along direction of sound wave when plate bends. This results in possibility to show Doppler effect, dependency of Doppler shift on direction of relative movement of sound source and receiver and oscillations simultaneously in different points of sound field, to record phase shift and detect wavelength. EFFECT: increased functional capabilities. |
