In this video, the presenter demonstrates a small and affordable kit that uses ultrasound to create sound waves, which, when controlled in a specific way, can suspend small polystyrene balls in mid-air. The kit includes various components like microcontrollers, resistors, capacitors, LEDs, and ultrasonic transducers. The assembly process is shown, and the result is a device that generates sound pressure to hold the balls in a stationary position. The video showcases the fascinating phenomenon of sound waves in action and their ability to suspend objects, making it an engaging and educational experiment.
1. The video is about a "very curious object" that uses ultrasound to suspend objects in the air. [Source: Document(page_content="00:00:00.20: Hello friends and welcome back to Survival\n00:00:03.06: hacking today we will see a very\n00:00:05.82: curious object which by exploiting sound waves in\n00:00:10.20: this case ultrasound in a\n00:00:12.78: particular way with a certain\n00:00:14.28: contrast manages to obtain a\n00:00:18.30: condition in which objects\n00:00:21.06: moved by this sound pressure\n00:00:23.28: remain suspended in the air l '\n00:00:26.76: very small cute and cheap object but which\n00:00:29.70: we will see immediately after the acronym\n00:00:40.08: before starting I remind you that in the\n00:00:41.88: description you will find all the\n00:00:43.14: necessary information on what\n00:00:44.70: you will see in the video for which Where to find\n00:00:47.04: the object the instructions and many other\n00:00:49.98: things that are possibly connected to\n00:00:52.26: we have already mentioned this object\n00:00:53.94: that it is a very cute and\n00:00:56.52: nice little object, very small, a really\n00:00:58.86: cheap kit but which allows us to\n00:01:01.80: know or make visible the\n00:01:05.40: sound waves through two transducers as well as\n00:01:07.80: opposing sounds which generate a\n00:01:10.92: particular\n00:01:11.84: sound flow which we will not hear\n00:01:14.16: because they are ultrasounds generate\n00:01:16.50: sound waves in a continuous and\n00:01:20.18: balanced way in some way through a\n00:01:23.42: microprocessor that is inside in\n00:01:26.10: order to generate these two\n00:01:28.20: sound pressures from these two transducers such\n00:01:31.38: that they are able to keep\n00:01:35.12: very small objects in suspension in this\n00:01:37.26: case they are some small\n00:01:38.82: polystyrene balls because obviously this\n00:01:40.26: project is made with only two\n00:01:41.76: sensors. There are versions that\n00:01:43.44: also have many more transducers\n00:01:45.90: but fifty really\n00:01:48.18: many transducers that manage to keep even slightly larger objects suspended\n00:01:50.40: through the ultrasonic waves\n00:01:53.58: is a\n00:01:56.34: phenomenon particularly if you think about it the\n00:01:58.26: sound pressure is one of those things\n00:01:59.94: that you can't see but you\n00:02:02.04: can hear when you stand\n00: