The ultrasonic beam from this sensor penetrates the skin, detects signals reflected from the vessel walls, and measures changes in vessel diameter. Using this principle, it measures the real-time ...

Abstract: Non-destructive inspection of concrete structures is often made using an ultrasonic sensor. With the conventional methods, however, a high reliable detection of anomalous parts (as cracks ...

Female moths don’t rely on sight or smell alone. They can also hear stressed plants. Scientists found that these insects detect ultrasonic clicks from plants under drought stress and use them when ...