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  • AI
    Artificial Intelligence

    A Gentle Introduction to vLLM for Serving

    Artificial Intelligence

    5 Tips for Building Useful Streamlit Dashboards in Minutes

    Artificial Intelligence

    Unified multimodal access layer for Quora’s Poe using Amazon Bedrock

    Artificial Intelligence

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    Artificial Intelligence

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    Artificial Intelligence

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    Artificial Intelligence

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    Artificial Intelligence

    5 Tips for Building Optimized Hugging Face Transformer Pipelines

    Artificial Intelligence

    How Yichao “Peak” Ji became a global AI app hitmaker

  • Apple
    First iPhone 17 and iPhone Air pre-orders now say ‘Shipped’

    First iPhone 17 and iPhone Air pre-orders now say ‘Shipped’

    Apple confirms: The new iPhones have a camera problem

    Apple confirms: The new iPhones have a camera problem

    iOS 26 has a new full-screen UI when you take a screenshot on your iPhone, here’s how to change it back

    iOS 26 has a new full-screen UI when you take a screenshot on your iPhone, here’s how to change it back

    September 17, 2025 – watchOS 26 features, more

    Mac mini, MacBook Air, 2025 Apple MagSafe charger9to5Mac

    Mac mini, MacBook Air, 2025 Apple MagSafe charger9to5Mac

    Here’s everything new for the Messages app in iOS 26

    Here’s everything new for the Messages app in iOS 26

    Apple promises software update to fix ‘very rare’ iPhone Air camera glitch

    Apple promises software update to fix ‘very rare’ iPhone Air camera glitch

    Apple prepares suppliers for an iPhone sales boost next year, fueled by the new foldable model

    Apple prepares suppliers for an iPhone sales boost next year, fueled by the new foldable model

    Photographer Tyler Stalman reviews the new iPhone cameras

    Photographer Tyler Stalman reviews the new iPhone cameras

  • Crypto
    Solana Following BNB Toward New Record Highs: SOL Price Analysis

    Solana Following BNB Toward New Record Highs: SOL Price Analysis

    Bitcoin Price Watch: BTC Struggles Below $118K as Momentum Cools

    Bitcoin Price Watch: BTC Struggles Below $118K as Momentum Cools

    Russia to Strengthen Grip on Digital-Asset Activities

    Russia to Strengthen Grip on Digital-Asset Activities

    Mavryk Secures $10M From Multibank to Power $10B UAE Real Estate Tokenization

    Mavryk Secures $10M From Multibank to Power $10B UAE Real Estate Tokenization

    Analyst: Trump Rode the Bitcoin Wave to Strengthen the Dollar

    Analyst: Trump Rode the Bitcoin Wave to Strengthen the Dollar

    Global Stage Bridging Washington and Seoul: Web3 Future to Be Discussed at KBW2025

    Global Stage Bridging Washington and Seoul: Web3 Future to Be Discussed at KBW2025

    GD Culture to Acquire Pallas Capital Assets, Adding 7,500 Bitcoin to Treasury

    GD Culture to Acquire Pallas Capital Assets, Adding 7,500 Bitcoin to Treasury

    Forward Industries Files $4 Billion Equity Program, Targets Solana Treasury Expansion

    Forward Industries Files $4 Billion Equity Program, Targets Solana Treasury Expansion

    India Mandates Cybersecurity Audits for Crypto Firms Under FIU’s Directive

    India Mandates Cybersecurity Audits for Crypto Firms Under FIU’s Directive

  • Gaming
    Where to find Noodle Grass in Hello Kitty Island Adventure

    Where to find Noodle Grass in Hello Kitty Island Adventure

    REDRAGON S101 GAMING KEYBOARD

    Steam is dropping Windows 32-bit support in 2026

    THE FINAL FINAL FNAF MOVIE TRAILER IS HERE! – Reaction & Analysis

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    Elden Ring Shadow of the Erdtree – Scorpion River Catacombs Walkthrough (All Items)

    Elden Ring Shadow of the Erdtree – Scorpion River Catacombs Walkthrough (All Items)

    Elden Ring DLC – Wish I Knew Sooner | Tips, Tricks, & Game Knowledge for New Players

    Elden Ring DLC – Wish I Knew Sooner | Tips, Tricks, & Game Knowledge for New Players

    Elden Ring Rune Farm | Rune Farm In DLC Area | Infinite Runes!

    Elden Ring Rune Farm | Rune Farm In DLC Area | Infinite Runes!

    More D&D Movie Trailer Thoughts | Nerd Immersion

    More D&D Movie Trailer Thoughts | Nerd Immersion

    The Last Pilgrimage – Zelda Breath Of The Wild Walkthrough – Solve Daag Chokah’s Shrine

    The Last Pilgrimage – Zelda Breath Of The Wild Walkthrough – Solve Daag Chokah’s Shrine

  • Retro Rewind
    Retro Rewind: Game Players Issue 80 Magazine January 1996

    Retro Rewind: Game Players Issue 80 Magazine January 1996

    Retro Rewind: Video Game Trader Winter 2014

    Retro Rewind: Video Game Trader Winter 2014

    Retro Rewind: Electronic Games April 1995

    Retro Rewind: Electronic Games April 1995

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

    Retro Rewind: Electronic Gaming Monthly Magazine Number 57 April 1994

    Retro Rewind: Blast from the Past – 35 Iconic Commercials of 1988!

    Retro Rewind: Blast from the Past – 35 Iconic Commercials of 1988!

    Retro Rewind: PC World Magazine August 1998

    Retro Rewind: PC World Magazine August 1998

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

  • Tech Art
    Top 20 Best Pixel Art RPG Games for Android and iOS – Best of 2025

    Top 20 Best Pixel Art RPG Games for Android and iOS – Best of 2025

    [01_Odyssey] Generative art Exhibition – Dark Room Experience

    [01_Odyssey] Generative art Exhibition – Dark Room Experience

    Viewer Request Print Digital Images From Portrait To Landscape – Digital Collage Club

    Viewer Request Print Digital Images From Portrait To Landscape – Digital Collage Club

    3d drawing easy on paper for beginner

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    Announcing the 2025 Center for Craft Archive Fellows

    Announcing the 2025 Center for Craft Archive Fellows

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  • Tech Deals
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    Sonic Unleashed – Classics Edition (Xbox 360)

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  • Techs Got To Eat
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    Spicy Chickpea Shakshuka Mug: 5-Minute Vegetarian Fuel

    Bacon & Spinach Mug Quiche: 3-Minute Gourmet Breakfast

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    Top 10 Vegetarian Recipes for 2025: Easy and Nutritious Meals for Busy People

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    Bacon Mug Lasagna: 5-Minute Microwave Meat Lover’s Dream

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    Bacon & Cheddar Mug Biscuit: 2-Minute Savory Comfort

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    Loaded Bacon Cheesy Potato Mug: 5-Minute Comfort Food

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  • Tesla
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    Head Up Display for Tesla Model Y 2019-2024 & Model 3 2017-2023 with Wireless/Wired…

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    Car Door Lights Logo Projector Compatible with Tesla Accessories for Model Y 3 X S, 2025…

    Car Door Lights Logo Projector Compatible with Tesla Accessories for Model Y 3 X S, 2025…

    Armor All Car Wash and Car Interior Cleaner Kit, Includes Towel, Tire Foam, Glass Spray,…

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    Maoershan EVA Hard Protective Travel Case Carrying Pouch Cover Bag for Tesla Charging…

    iJDMTOY 2pc Set Track Racing Style Direct Fit Silver Aluminum Accelerator and Brake Foot…

    iJDMTOY 2pc Set Track Racing Style Direct Fit Silver Aluminum Accelerator and Brake Foot…

    Shakas Motorcycle Accelerator Throttle Seat, Temperature Resistant High Strength Alloy…

    Shakas Motorcycle Accelerator Throttle Seat, Temperature Resistant High Strength Alloy…

    1pc Wolf Pack Badges Emblems 3D Logo Replacement for Tsla Cybertruck 2024 Car Truck…

    1pc Wolf Pack Badges Emblems 3D Logo Replacement for Tsla Cybertruck 2024 Car Truck…

  • UFO
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    Tornado Warning At Disney World! #shorts

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    Alien Birthday Party Decorations Door Curtain with Foil Fringe Tinsel Spacecraft Flying Saucer Spaceship Hanging Banner for Alien Halloween Party(Fluorescent Yellow)

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    What is “Alive” in Alien Stage’s Wiege Music Video? THEORY #alienstage analysis

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    The Proof Is Out There: UFO Encounters Terrify Witnesses

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  • AI
    Artificial Intelligence

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  • Apple
    First iPhone 17 and iPhone Air pre-orders now say ‘Shipped’

    First iPhone 17 and iPhone Air pre-orders now say ‘Shipped’

    Apple confirms: The new iPhones have a camera problem

    Apple confirms: The new iPhones have a camera problem

    iOS 26 has a new full-screen UI when you take a screenshot on your iPhone, here’s how to change it back

    iOS 26 has a new full-screen UI when you take a screenshot on your iPhone, here’s how to change it back

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    Here’s everything new for the Messages app in iOS 26

    Apple promises software update to fix ‘very rare’ iPhone Air camera glitch

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    Apple prepares suppliers for an iPhone sales boost next year, fueled by the new foldable model

    Apple prepares suppliers for an iPhone sales boost next year, fueled by the new foldable model

    Photographer Tyler Stalman reviews the new iPhone cameras

    Photographer Tyler Stalman reviews the new iPhone cameras

  • Crypto
    Solana Following BNB Toward New Record Highs: SOL Price Analysis

    Solana Following BNB Toward New Record Highs: SOL Price Analysis

    Bitcoin Price Watch: BTC Struggles Below $118K as Momentum Cools

    Bitcoin Price Watch: BTC Struggles Below $118K as Momentum Cools

    Russia to Strengthen Grip on Digital-Asset Activities

    Russia to Strengthen Grip on Digital-Asset Activities

    Mavryk Secures $10M From Multibank to Power $10B UAE Real Estate Tokenization

    Mavryk Secures $10M From Multibank to Power $10B UAE Real Estate Tokenization

    Analyst: Trump Rode the Bitcoin Wave to Strengthen the Dollar

    Analyst: Trump Rode the Bitcoin Wave to Strengthen the Dollar

    Global Stage Bridging Washington and Seoul: Web3 Future to Be Discussed at KBW2025

    Global Stage Bridging Washington and Seoul: Web3 Future to Be Discussed at KBW2025

    GD Culture to Acquire Pallas Capital Assets, Adding 7,500 Bitcoin to Treasury

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    Forward Industries Files $4 Billion Equity Program, Targets Solana Treasury Expansion

    Forward Industries Files $4 Billion Equity Program, Targets Solana Treasury Expansion

    India Mandates Cybersecurity Audits for Crypto Firms Under FIU’s Directive

    India Mandates Cybersecurity Audits for Crypto Firms Under FIU’s Directive

  • Gaming
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    Where to find Noodle Grass in Hello Kitty Island Adventure

    REDRAGON S101 GAMING KEYBOARD

    Steam is dropping Windows 32-bit support in 2026

    THE FINAL FINAL FNAF MOVIE TRAILER IS HERE! – Reaction & Analysis

    Suffering with Silksong’s hard-as-nails High Halls gauntlet? Fret not, there’s a way to get some help

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    Elden Ring DLC – Wish I Knew Sooner | Tips, Tricks, & Game Knowledge for New Players

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  • Retro Rewind
    Retro Rewind: Game Players Issue 80 Magazine January 1996

    Retro Rewind: Game Players Issue 80 Magazine January 1996

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    Retro Rewind: Electronic Games April 1995

    Retro Rewind: Electronic Games April 1995

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    Retro Rewind: Electronic Gaming Monthly Magazine Number 57 April 1994

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    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

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  • Tech Art
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    Top 20 Best Pixel Art RPG Games for Android and iOS – Best of 2025

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    Announcing the 2025 Center for Craft Archive Fellows

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  • Tech Deals
    NIMO 15.6″ IPS FHD Gaming-Laptop, AMD 8 Cores Ryzen 7 7735HS 32GB DDR5 RAM 1TB SSD…

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  • Techs Got To Eat
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  • UFO
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    Geelin 6 Pack 24 Inch Large Halloween Alien Yard Signs with Stakes Glow in the Dark Alien Ufo Lawn Sign Eyes Scary Silhouette Halloween Decorations for Patio Garden Outdoor Decor

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    The Proof Is Out There: UFO Encounters Terrify Witnesses

    The Proof Is Out There: UFO Encounters Terrify Witnesses

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Home MIT Tech

Tunable ultrasound propagation in microscale metamaterials | MIT News

MIT Tech by MIT Tech
November 20, 2024
in MIT Tech
Reading Time: 4 mins read
129
A A
0


Anne Wilson | Department of Mechanical Engineering
2024-11-20 17:20:00
news.mit.edu

Acoustic metamaterials — architected materials that have tailored geometries designed to control the propagation of acoustic or elastic waves through a medium — have been studied extensively through computational and theoretical methods. Physical realizations of these materials to date have been restricted to large sizes and low frequencies.

“The multifunctionality of metamaterials — being simultaneously lightweight and strong while having tunable acoustic properties — make them great candidates for use in extreme-condition engineering applications,” explains Carlos Portela, the Robert N. Noyce Career Development Chair and assistant professor of mechanical engineering at MIT. “But challenges in miniaturizing and characterizing acoustic metamaterials at high frequencies have hindered progress towards realizing advanced materials that have ultrasonic-wave control capabilities.”

A new study coauthored by Portela; Rachel Sun, Jet Lem, and Yun Kai of the MIT Department of Mechanical Engineering (MechE); and Washington DeLima of the U.S. Department of Energy Kansas City National Security Campus presents a design framework for controlling ultrasound wave propagation in microscopic acoustic metamaterials. A paper on the work, “Tailored Ultrasound Propagation in Microscale Metamaterials via Inertia Design,” was recently published in the journal Science Advances. 

“Our work proposes a design framework based on precisely positioning microscale spheres to tune how ultrasound waves travel through 3D microscale metamaterials,” says Portela. “Specifically, we investigate how placing microscopic spherical masses within a metamaterial lattice affect how fast ultrasound waves travel throughout, ultimately leading to wave guiding or focusing responses.”

Through nondestructive, high-throughput laser-ultrasonics characterization, the team experimentally demonstrates tunable elastic-wave velocities within microscale materials. They use the varied wave velocities to spatially and temporally tune wave propagation in microscale materials, also demonstrating an acoustic demultiplexer (a device that separates one acoustic signal into multiple output signals). The work paves the way for microscale devices and components that could be useful for ultrasound imaging or information transmission via ultrasound.

“Using simple geometrical changes, this design framework expands the tunable dynamic property space of metamaterials, enabling straightforward design and fabrication of microscale acoustic metamaterials and devices,” says Portela.

The research also advances experimental capabilities, including fabrication and characterization, of microscale acoustic metamaterials toward application in medical ultrasound and mechanical computing applications, and underscores the underlying mechanics of ultrasound wave propagation in metamaterials, tuning dynamic properties via simple geometric changes and describing these changes as a function of changes in mass and stiffness. More importantly, the framework is amenable to other fabrication techniques beyond the microscale, requiring merely a single constituent material and one base 3D geometry to attain largely tunable properties.

“The beauty of this framework is that it fundamentally links physical material properties to geometric features. By placing spherical masses on a spring-like lattice scaffold, we could create direct analogies for how mass affects quasi-static stiffness and dynamic wave velocity,” says Sun, first author of the study. “I realized that we could obtain hundreds of different designs and corresponding material properties regardless of whether we vibrated or slowly compressed the materials.”


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