LMEC-16 Apparatus of Sound Velocity Measurement and Ultrasonic Ranging
The propagation speed of sound wave is an important physical quantity. In ultrasonic ranging, positioning, liquid velocity measurement, material elastic modulus measurement, gas temperature instantaneous change measurement, will involve the sound speed physical quantity. The transmission and reception of ultrasound is also one of the important means of anti-theft, monitoring and medical diagnosis. This instrument can measure the speed of sound propagation in the air and the wavelength of sound wave in the air, and add the experimental content of ultrasonic ranging, so that students can master the basic principles and experimental methods of wave theory.
Experiments
1. Measure the velocity of sound wave propagating in the air by the method of resonant interference.
2. Measure the velocity of sound wave propagating in the air by the method of phase comparison.
3. Measure the velocity of sound wave propagating in the air by the method of time difference.
4. Measure the distance of a barrier board by the method of reflection.
Parts and Specifications
| Description | Specifications |
| Sine wave signal generator: | Frequency range: 30 ~ 50 kHz; resolution: 1 Hz |
| Ultrasonic transducer | Piezo-ceramic chip; oscillation frequency: 40.1 ± 0.4 kHz |
| Vernier caliper | Range: 0 ~ 200 mm; accuracy: 0.02 mm |
| Experimental platform | Base board size 380 mm (L) × 160 mm (W) |
| Measurement accuracy | Sound velocity in air, error < 2% |
