Keep objects lifted by airborne sound despite interference

طريقة للحفاظ على الأجسام ترفع بفعل الصوت من السقوط بسبب التداخل

Real-time 3D audio visualization with random scattering surfaces. (a) The mathematical concept of our 3D acoustic technology that can create many fly-traps in the presence of sound-dispersing physical objects. Pmax represents the maximum pressure amplitude of the sound field. (b) Experimental example of our technique that can fly four particles with a display screen (i.e. a piece of light cloth), demonstrating an MR screen that creates digital content in the presence of a 3D printed physical object. The high computational rates of our approach allow digital content to be interactive with user input (eg a raised screen moves according to keyboard input). attributed to him: science progress (2022). DOI: 10.1126 / sciadv.abn7614

A team of researchers at University College London has developed a way to keep objects lifted by airborne sound waves when other objects interfere with the flight path. In their paper published in the journal science progressthe group describes a self-correcting hover system.

Previous research has shown that it is possible to lift objects by shooting sound waves at them. Because sound waves are nothing more than air molecules moving together in a certain way, an object being lifted will fall if the object interferes with the sound waves. In this new effort, researchers have developed new features to address this problem.






attributed to him: science progress (2022). DOI: 10.1126 / sciadv.abn7614

To protect sound waves from confusionthe researchers increased the number of Amplifiers They used – in their work, they used 256. They also added software to control each of the speakers. The speakers were arranged in a grid and objects were lifted by shaped sound waves. By programming the speakers in specific ways, the team was able to get the system to work together to maintain a higher object Grid In the air despite the interruptions. If some of It seems Other waves are blocked sound waves They were redirected to take their place.

The researchers demonstrated that their system was viable by testing it using a 3D-printed white rabbit as an interference object. Things were lifted around the rabbit regardless of its location. In one experiment, researchers raised beads around a rabbit that formed in the shape of a flying butterfly. They also raised a transparent piece of cloth that they used as a screen to display the rabbit that they had printed. And they raised one drop of water over a glass of water, showing that their system would work even when the interfering object was a cup of vibrating liquid.






This video shows the creation of a butterfly that flutters around a 3D-printed rabbit, which can be controlled by hand gestures. attributed to him: science progress (2022). DOI: 10.1126 / sciadv.abn7614

The researchers suggest that their system could be used for display purposes, such as in museums or advertising. They then plan to extend their system to allow it to handle multiple nested objects at the same time.


Using sound waves to model the rotational dynamics of inertial multiparticle objects


more information:
Ryuji Hirayama et al, High-speed acoustic holography with arbitrary scattering elements, science progress (2022). DOI: 10.1126 / sciadv.abn7614

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