The basic principles of ultrasonic testing involve the propagation and reflection of sound waves. This 8-minute, 14-second video shows how defects and abnormalities can be detected using the ...

However, your mission may be to send some small data to another phone and to do that you would need to write a huge bunch of code including handling many scenarios while you can just use audio ...

It is hard for the human eye to determine how sound the steel is that is holding back almost a whole ton of oil. (Yes, your typical 275 gallon home heating oil tank weighs almost one ton when full of ...

A team of marine biologists from Norway, the U.S. and Denmark has conducted the first hearing test of a live baleen whale.

Research reveals that moths use ultrasonic sounds from drought-stressed plants to guide their egg-laying, favouring healthier ...

An ultrasonic distance sensor is a device that sends out pulses of ultrasonic sound, and measures the time they take to bounce off nearby objects and be reflected back. They can measure distances ...

They work by measuring the time it takes for an ultrasonic audio pulse to be reflected the ... Since [Jianjia] does not have access to a wind tunnel for testing and calibration, he improvised ...

But a hackier way would be to build a parametric speaker that focuses soundwaves into a narrow beam like [Shane] did with this ultrasonic sound gun. As the directivity of a soundwave depends on ...

Ultrasonic sound is a vibration at a frequency above the range of human hearing, usually greater than 20 kHz. Unlike other types of position sensors, ultrasonic linear position sensors and switches ...

Ultrasonic testing uses high-frequency sound waves to create an image of the internal body of the material and structure. Ultrasonic testing also helps to diagnose medical conditions without ...