The design of the instrument is improved and the data stability of time difference measurement is improved, which is better than the similar products.

Experiments
1. Resonance interferometry (standing wave method), phase method and time difference method are used to measure sound velocity;
2. Sound velocity measurement in air, liquid and solid medium.

Main technical parameters
1. Continuous wave signal generator: frequency range: 25kHz ~ 50KHz, distortion less than 0.1%, frequency regulation resolution: 1Hz, high stability, suitable for phase measurement;
2. Periodic pulse generator and microsecond meter: pulse wave is used in time difference measurement, with pulse frequency of 37khz; Microsecond meter: 10us-100000us, resolution: 1US;
3. Transmitting and receiving piezoelectric ceramic transducer, working frequency: 37 ± 3kHz, continuous power: 5W;
4. The range resolution of digital ruler is 0.01mm and the length is 300mm;
5. The test stand can be detached from the liquid tank; Similar products with other parameters can also be produced and customized.
6. Dual trace oscilloscope not included.