Only 1 Person in the World Can Hear this Speaker - Ultrasonic Directional Speaker
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Learn more about Corsair Custom Lab at: lmg.gg Get Free Shipping at Ridge by using the code LINUS at ridge.com Today we played with an Ultrasonic Speaker which allows Audio to travel incredible distances and only be heard by 1 PERSON! Linus even pranks LTT Staff but also breaks down how these transducers work as well as their use in Museums and theme parks. Discuss on the forum: linustechtips.com Buy Audfly Model B: audflyspeaker.com Buy Edifier QD35: geni.us Purchases made through some store links may provide some compensation to Linus Media Group. ► GET MERCH: lttstore.com ► GET EXCLUSIVE CONTENT ON FLOATPLANE: lmg.gg ► GET A VPN: piavpn.com ► SPONSORS, AFFILIATES, AND PARTNERS: lmg.gg ► EQUIPMENT WE USE TO FILM LTT: lmg.gg ► OUR WAN PODCAST GEAR: lmg.gg FOLLOW US --------------------------------------------------- Twitter: twitter.com Facebook: @LinusTech Instagram: @linustech TikTok: @linustech Twitch: twitch.tv MUSIC CREDIT --------------------------------------------------- Intro: Laszlo - Supernova Video Link: youtube.com iTunes Download Link: itunes.apple.com Artist Link: soundcloud.com Outro: Approaching Nirvana - Sugar High Video Link: youtube.com Listen on Spotify: spoti.fi Artist Link: youtube.com Intro animation by MBarek Abdelwassaa @mbarek_abdel Monitor And Keyboard by vadimmihalkevich / CC BY 4.0 geni.us Mechanical RGB Keyboard by BigBrotherECE / CC BY 4.0 geni.us Mouse Gamer free Model By Oscar Creativo / CC BY 4.0 geni.us CHAPTERS --------------------------------------------------- 0:00 Intro 1:23 What does it sound like 2:22 How does it Work? 4:29 Trolling LTT Staff 5:41 It bounces also! 6:35 How far can it Travel? 8:05 The downside of Ultrasonic Audio 8:56 The use Cases 10:26 Outro
The video introduces the Audfly Model B ultrasonic directional speaker, a device that can project sound into a highly focused cone so that only a specific listener perceives the audio. The host explains that unlike conventional speakers, ultrasonic transducers work by encoding audible sound into ultrasonic waves which are not normally audible to humans. Through explanation and demonstrations, they show how the system can create a private listening zone that feels headphone-like without wearing any device. A key point is that the directionality comes from the much shorter ultrasonic wavelengths, which reduces spreading and allows sharper focus, though the effective listening angle remains finite. The segment also covers how normal microphones pick up only faint ultrasonic components, so the audible result for bystanders remains minimal unless the encoding is decoded by the listener’s equipment. The discussion emphasizes the blend of math, engineering, and computer simulations that made this technology practically usable, moving from theory to a working directional speaker. Finally, the host frames the technology within real-world contexts, noting potential uses in museums and themed installations where targeted audio can enrich visitor experiences without disturbing others nearby.
Topics · technology · science · entertainment · education
Questions answered
- What makes the Audfly Model B able to deliver sound to a single listener while others nearby do not hear it?
- It uses ultrasonic transducers to encode audible sound into ultrasonic waves with a focused beam, creating a private listening cone that is heard by the intended listener who has the decoding/receiving setup, while others hear little or no sound.
- What are practical uses of this technology according to the video?
- Possible uses include museums and galleries for targeted audio guides, commercial signage and advertising, themed installations like haunted houses, and private listening experiences in public or showroom environments.
- What is a notable downside of ultrasonic audio as described?
- Ultrasonic waves can be blocked by simple obstructions like paper or walls, and the high amplitude needed for encoding can be uncomfortable for some people and animals.