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More precise, efficient ballistic testing methodology developed

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More precise, efficient ballistic testing methodology developed


Southwest Research Institute (SwRI) has expanded and advanced a ballistic resistance testing technique, the Laser-Induced Particle Impact Test (LIPIT), previously only used for microscopic projectile impact testing. Here, SwRI’s Dr. Daniel Portillo positions a test article for LIPIT evaluation using the larger impact projectiles to better simulate full-scale impact testing. Credit: Southwest Research Institute

Southwest Research Institute (SwRI) has expanded the scope of a ballistic-resistance testing technique, the Laser-Induced Particle Impact Test (LIPIT), previously only applicable for impact testing of very small projectiles. By improving this technique, SwRI has dramatically increased the precision and efficiency of material ballistic resistance testing at scales not possible before.

“Essentially, we’ve bridged the gap between LIPIT and conventional ballistics testing,” said Dr. Daniel Portillo of SwRI’s Engineering Dynamics Department, who co-authored a study detailing these results with SwRI’s Dr. F. Michael Heim and Dr. Sidney Chocron. “The efficient new technique allows researchers to launch larger projectiles than previous LIPIT processes at a higher rate. Normally, we’d do 30 to 40 ballistics tests a day. We now have an that can do 200 tests in an hour.”

Ballistic resistance testing determines a material’s response to high-speed impacts. It is often used to evaluate protective materials, such as armor for soldiers and military vehicles or spacecraft shielding. These tests determine a material’s ballistic protection performance based on the impact speed that gives a a 50% chance of penetrating the test material.

The traditional LIPIT process uses a high-powered laser to launch microscopic stainless-steel spheres at target materials to evaluate their ballistic limits. It uses the same basic principles as a gun, which ignites gunpowder to create hot gas to propel a bullet through its barrel.

LIPIT uses a laser to heat gas to propel projectiles. The precision of the laser allows the researchers to automate several aspects of the process, but it requires small projectiles and test articles for accurate results. In some cases, target materials can be scaled down, but many cannot be made thin enough to match the size of the projectiles, which are about 0.1 millimeters or the width of a strand of hair, for standard LIPIT evaluations.

SwRI develops more precise, efficient ballistic testing methodology
Southwest Research Institute (SwRI) has expanded and advanced a ballistic resistance testing technique, the Laser-Induced Particle Impact Test (LIPIT), previously limited to using microscopic projectiles 0.1 millimeters in size. To make LIPIT data more applicable to full-scale ballistics testing, SwRI engineered a test system to launch larger projectiles 0.3 millimeters in size, shown here with a needle for scale. The team then automated the process to allow hundreds of tests an hour. Credit: Southwest Research Institute

To remedy this and make LIPIT results more applicable to full-scale ballistics testing, SwRI engineered a LIPIT system to launch larger projectiles of 0.3 millimeters, or the size of a grain of salt. The process has also been automated and, as a result, hundreds of tests can be performed in an hour.

To accomplish this, the researchers improved the laser pulse energy, material and chamber design to optimize how the heated gas accelerates the projectiles.

“Using larger projectiles allows us to create scaled-down targets with meaningful thickness and ,” Portillo said. “We can use scaled targets that behave in realistic ways under impact, without pushing the limits of material fabrication to an impractical degree.”

SwRI now offers a wider range of LIPIT ballistic evaluations to clients and plans to continue expanding the method and to explore new applications.

The paper “High-Throughput Ballistic Limit Testing Using Laser-Induced Particle Impact Tests” is available in the Proceedings of the 34th International Symposium on Ballistics.

More information:
Daniel Portillo et al, High-throughput ballistic limit testing using laser-induced particle impact tests, Ballistics 2025 (2025). DOI: 10.12783/ballistics25/37173

Citation:
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retrieved 2 September 2025
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This Jammer Wants to Block Always-Listening AI Wearables. It Probably Won’t Work

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This Jammer Wants to Block Always-Listening AI Wearables. It Probably Won’t Work


Deveillance also claims the Spectre can find nearby microphones by detecting radio frequencies (RF), but critics say finding a microphone via RF emissions is not effective unless the sensor is immediately beside it.

“If you could detect and recognize components via RF the way Spectre claims to, it would literally be transformative to technology,” Jordan wrote in a text to WIRED after he built a device to test detecting RF signatures in microphones. “You’d be able to do radio astronomy in Manhattan.”

Deveillance is also looking at ways to integrate nonlinear junction detection (NLJD), a very high-frequency radio signal used by security professionals to find hidden mics and bugs. NLJD detectors are expensive and used primarily in professional contexts like military operations.

Even if a device could detect a microphone’s exact location, objects around a room can change how the frequencies spread and interact. The emitted frequencies could also be a problem. There haven’t been adequate studies to show what effects ultrasonic frequencies have on the human ear, but some people and many pets can hear them and find them obnoxious or even painful. Baradari acknowledges that her team needs to do more testing to see how pets are affected.

“They simply cannot do this,” engineer and YouTuber Dave Jones (who runs the channel EEVblog) wrote in an email to WIRED. “They are using the classic trick of using wording to imply that it will detect every type of microphone, when all they are probably doing is scanning for Bluetooth audio devices. It’s totally lame.” Baradari reiterates that the Spectre uses a combination of RF and Bluetooth low energy to detect microphones.

WIRED asked Baradari to share any evidence of the Spectre’s effectiveness at identifying and blocking microphones in a person’s vicinity. Baradari shared a few short videoclips of people putting their phones to their ears listening to audioclips—which were presumably jammed by the Spectre—but these videos do little to prove that the device works.

Future Imperfect

Baradari has taken the critiques in stride, acknowledging that the tech is still in development. “I actually appreciate those comments, because they’re making me think and see more things as well,” Baradari says. “I do believe that with the ideas that we’re having and integrating into one device, these concerns can be addressed.”

People were quick to poke fun at the Spectre I online, calling the technology the cone of silence from Dune. Now, the Deveillance website reads, “Our goal is to make the cone of silence become reality.”

John Scott-Railton, a cybersecurity researcher at Citizen Lab, who is critical of the Spectre I, lauded the device’s virality as an indication of the real hunger for these kinds of gadgets to win back our privacy.

“The silver lining of this blowing up is that it is a Ring-like moment that highlights how quickly and intensely consumer attitudes have shifted around pervasive recording devices,” says Scott-Railton. “We need to be building products that do all the cool things that people want but that don’t have the massive privacy- and consent-violation undertow. You need device-level controls, and you need regulations of the companies that are doing this.”

Cooper Quintin, a senior staff technologist at the Electronic Frontier Foundation, echoed those sentiments, even if critics believe Deveillance’s efforts to be flawed.

“If this technology works, it could be a boon for many,” Quintin wrote in an email to WIRED. “It is nice to see a company creating something to protect privacy instead of working on new and creative ways to extract data from us.”



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I’ve Tried Every Pixel Phone Ever Made—Here Are the Best to Buy Right Now

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Portrait Light: You can change up the lighting in your portrait selfies after you take them by opening them up in Google Photos, tapping the Edit button, and heading to Actions > Portrait Light. This adds an artificial light you can place anywhere in the photo to brighten up your face and erase that 5 o’clock shadow. Use the slider at the bottom to tweak the strength of the light. It also works on older Portrait mode photos you may have captured. It works only on faces.

Health and Accessibility Features

Cough & Snore Detection (Tensor G2 and newer): On the Pixel 7 and newer, you can have your Pixel detect if you cough and snore when sleeping, provided you place your Pixel near your bed before you nod off. This will work only if you use Google’s Bedtime mode function, which you can turn on by heading to Settings > Digital Wellbeing & Parental Controls > Bedtime Mode.

Guided Frame (Tensor G2 and newer): For blind or low-vision people, the camera app can now help take a selfie with audio cues (it works with the front and rear cameras). You’ll need to enable TalkBack for this to work (Settings > Accessibility > TalkBack). Then open the camera app. It will automatically help you frame the shot.

Simple View: This mode makes the font size bigger, along with other elements on the screen, like widgets and quick-settings tiles. It also increases touch sensitivity, all of which hopefully makes it easier to see and use the screen. You can enable it by heading to Settings > Accessibility > Simple View.

Safety and Security Features

Theft Protection: This is a broader Android 15 feature, but essentially, Google’s algorithms can figure out if someone snatches your Pixel out of your hands. If they’re trying to get away, the device automatically locks. Additionally, with another device, you can use Remote Lock to lock your stolen Pixel with your phone number and a security answer. To toggle these features on, go to Settings > Security & privacy > Device unlock > Theft protection.

Identity Check: If your Pixel detects you’re in a new location, Identity Check will require your fingerprint or face authentication before you can make any changes to sensitive settings, offering extra peace of mind in case you lose your phone or if it’s stolen. You can enable this in Settings > Security & privacy > Device unlock > Theft protection > Identity Check.

Courtesy of Google

Private Space: Another Android 15 addition, Pixel phones finally have a feature that lets you hide and lock select apps. You can use a separate Google account, set a lock, and install any app to hide away. To set it all up, head to Settings > Security & privacy > Private space.

Satellite eSOS (Pixel 9 and Pixel 10 series, excluding Pixel 9a): Like Apple’s SOS feature on iPhones, you can now reach emergency contacts or emergency services even when you don’t have cell service or Wi-Fi connectivity. It’s not just available in the continental US, but also in Hawaii, Alaska, Canada, and even Europe.



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I’ve Tried Every Pixel Phone Ever Made—Here Are the Best to Buy Right Now

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I’ve Tried Every Pixel Phone Ever Made—Here Are the Best to Buy Right Now


Portrait Light: You can change up the lighting in your portrait selfies after you take them by opening them up in Google Photos, tapping the Edit button, and heading to Actions > Portrait Light. This adds an artificial light you can place anywhere in the photo to brighten up your face and erase that 5 o’clock shadow. Use the slider at the bottom to tweak the strength of the light. It also works on older Portrait mode photos you may have captured. It works only on faces.

Health and Accessibility Features

Cough & Snore Detection (Tensor G2 and newer): On the Pixel 7 and newer, you can have your Pixel detect if you cough and snore when sleeping, provided you place your Pixel near your bed before you nod off. This will work only if you use Google’s Bedtime mode function, which you can turn on by heading to Settings > Digital Wellbeing & Parental Controls > Bedtime Mode.

Guided Frame (Tensor G2 and newer): For blind or low-vision people, the camera app can now help take a selfie with audio cues (it works with the front and rear cameras). You’ll need to enable TalkBack for this to work (Settings > Accessibility > TalkBack). Then open the camera app. It will automatically help you frame the shot.

Simple View: This mode makes the font size bigger, along with other elements on the screen, like widgets and quick-settings tiles. It also increases touch sensitivity, all of which hopefully makes it easier to see and use the screen. You can enable it by heading to Settings > Accessibility > Simple View.

Safety and Security Features

Theft Protection: This is a broader Android 15 feature, but essentially, Google’s algorithms can figure out if someone snatches your Pixel out of your hands. If they’re trying to get away, the device automatically locks. Additionally, with another device, you can use Remote Lock to lock your stolen Pixel with your phone number and a security answer. To toggle these features on, go to Settings > Security & privacy > Device unlock > Theft protection.

Identity Check: If your Pixel detects you’re in a new location, Identity Check will require your fingerprint or face authentication before you can make any changes to sensitive settings, offering extra peace of mind in case you lose your phone or if it’s stolen. You can enable this in Settings > Security & privacy > Device unlock > Theft protection > Identity Check.

Courtesy of Google

Private Space: Another Android 15 addition, Pixel phones finally have a feature that lets you hide and lock select apps. You can use a separate Google account, set a lock, and install any app to hide away. To set it all up, head to Settings > Security & privacy > Private space.

Satellite eSOS (Pixel 9 and Pixel 10 series, excluding Pixel 9a): Like Apple’s SOS feature on iPhones, you can now reach emergency contacts or emergency services even when you don’t have cell service or Wi-Fi connectivity. It’s not just available in the continental US, but also in Hawaii, Alaska, Canada, and even Europe.



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