Ultrasound
Ultrasonic range finding
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The measured travel time of Sonar pulses in water is strongly dependent on the temperature and the salinity of the water. Ultrasonic ranging is also applied for measurement in air and for short distances. For example, hand-held ultrasonic measuring tools can rapidly measure the layout of rooms. |
The measured travel time of Sonar pulses in water is strongly dependent on the temperature and the salinity of the water. Ultrasonic ranging is also applied for measurement in air and for short distances. For example, hand-held ultrasonic measuring tools can rapidly measure the layout of rooms. |
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Although range finding underwater is performed at both sub-audible and audible frequencies for great distances (1 to several kilometers), ultrasonic range finding is used when distances are shorter and the accuracy of the distance measurement is desired to be |
Although range finding underwater is performed at both sub-audible and audible frequencies for great distances (1 to several kilometers), ultrasonic range finding is used when distances are shorter and the accuracy of the distance measurement is desired to be better. Ultrasonic measurements may be limited through barrier layers with large salinity, temperature or vortex differences. Ranging in water varies from about hundreds to thousands of meters, but can be performed with centimeters to meters for accuracy. |
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===Ultrasound Identification (USID)=== |
===Ultrasound Identification (USID)=== |
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