Skoda has developed new technology it believes will make car mechanics’ lives easier – or possible make them redundant entirely.
The Czech brand – which sits under VW Group’s ownership – says it has completed successful trials of a smartphone app that can listen to any thuds, bangs or clatter produced by a vehicle and diagnose the problem from the sound alone.
Called the Skoda Sound Analyser, the manufacturer says it has a 90 per cent success rate of identifying issues with cars correctly.
A research collaboration between Queen Mary University of London, the University of Cambridge and the Institute for High Pressure Physics in Troitsk has discovered the fastest possible speed of sound.
The result- about 36 km per second — is around twice as fast as the speed of sound in diamond, the hardest known material in the world.
Waves, such as sound or light waves, are disturbances that move energy from one place to another. Sound waves can travel through different mediums, such as air or water, and move at different speeds depending on what they’re travelling through. For example, they move through solids much faster than they would through liquids or gases, which is why you’re able to hear an approaching train much faster if you listen to the sound propagating in the rail track rather than through the air.
Einstein’s theory of special relativity sets the absolute speed limit
Physicists tested sound as it travels through different materials
Sound can almost reach its upper limit when traveling in solid atomic hydrogen
The finding is vital in different fields of studies like materials science and condensed matter physics
Sound waves can travel to up to 36 kilometers or more than 22 miles per second when traveling through solids or liquids, a new study by a team of physicists revealed. The physicists said that their calculation could be the first known variables representing the threshold of sound waves.
Before this new finding, the speed of sound was measured based on Albert Einstein’s theory of special relativity that identified sound waves threshold similar to that of the speed of light (300,000 kilometers or over 186,000 miles per second).
In a study, published in the journal Science Advances, the physicists said to calculate for the threshold of the speed of sound,
Sound has a speed limit. Under normal circumstances, its waves can travel no faster than about 36 kilometers per second, physicists propose October 9 in Science Advances.
Sound zips along at different rates in different materials — moving faster in water than in air for example. But under conditions found naturally on Earth, no material can host sound waves that outpace this ultimate limit, which is about 100 times the typical speed of sound traveling in air.
The team’s reasoning rests on well-known equations of physics and mathematical relationships. “Given the simplicity of the argument, it suggests that [the researchers] are putting their finger on something very deep,” says condensed matter physicist Kamran Behnia of École Supérieure de Physique et de Chimie Industrielles in Paris.
The equation for the speed limit rests on fundamental constants, special numbers that rule the cosmos. One such number, the speed of light, sets
I don’t know about you but I’ve lost count of the number of times I’ve heard people in the startup world string meaningless words together.
“Enable best-of-breed convergence,” and “synthesize distributed users,” are just two of my favorite jargon-fuelled phrases — even if I don’t understand what they mean.
Why, oh, why do people feel the need to spout these meaningless, empty words? Well, according to one specific study, insecurity in the workplace may play a part.
The study, titled ‘Compensatory conspicuous communication: Low status increases jargon use,’ found a correlation between aspiring business professionals, who experienced low status (aka being at the bottom of the chain at work), would use more acronyms in their written communication.
[Read: 6 work phrases you need to drop if you want your team to like you]
Interestingly, the same study also found that lower-status individuals focused more on
If you turn on the feature, called Sound Notifications, you can have your Android phone inform you about some sounds via a push notification, a flash from your camera light, or by making your phone vibrate. Other devices support Sound Notifications as well, including Wear OS devices, which can send Sound Notifications via text notifications with vibrations. And they work entirely offline, according to Google.
Google says Sound Notifications can listen for ten different noises:
Smoke and fire alarms
Landline phone ringing
Sound Notifications are already installed on Pixel phones and “select other Android phones” and can be turned on from the accessibility
Google on Thursday announced a new Android accessibility feature called Sound Notifications. In a blog post co-written by artificial intelligence product manager Sagar Savla and accessibility product manager Sharlene Yuan, the company said Sound Notifications is designed to alert users with hearing loss when various sounds occur, such as when a kitchen appliance beeps or water runs. Google cited a World Health Organization statistic that some 466 million people worldwide, 34 million of which are children, have “disabling hearing loss.”
Sound Notifications are meant to “make important and critical household sounds more accessible with push notifications, a flash from your camera light, or vibrations” on Android and Wear OS devices, according to Google. They also note the feature has relevance beyond hearing loss; it can be beneficial to those who are temporarily disabled due to injury, or even simply wearing earplugs or headphones.
From capturing your breath to guiding biological cell movements, 3D printing of tiny, transparent conducting fibres could be used to make devices which can ‘smell, hear and touch’ — making it particularly useful for health monitoring, Internet of Things and biosensing applications.
Researchers from the University of Cambridge used 3D printing, also known as additive manufacturing, techniques to make electronic fibres, each 100 times thinner than a human hair, creating sensors beyond the capabilities of conventional film-based devices.
The fibre printing technique, reported in the journal Science Advances, can be used to make non-contact, wearable, portable respiratory sensors. These printed sensors are high-sensitivity, low-cost and can be attached to a mobile phone to collect breath pattern information, sound and images at the same time.
First author Andy Wang, a PhD student from Cambridge’s Department of Engineering, used the fibre sensor to test the amount of breath moisture leaked through his
A new device eavesdrops on objects to take their temperatures.
Hot objects not only glow, but also softly hum. The hum is generated by the rapid jitters of particles that make up the hot object. If human ears were keen enough to hear this noise, “it would sound like radio static,” says Tom Purdy of the University of Pittsburgh. “The hotter [an object] gets, the louder it gets.”
Purdy, along with Robinjeet Singh of the University of Maryland in College Park, created an acoustic thermometer that senses the intensity of heat-generated sound emanating from nearby objects. The heart of the device is a one-square-millimeter sheet of silicon nitride. That sheet is suspended within a window cut in the center of a silicon chip, which transmits sound waves better than air.
In experiments, the physicists deposited blobs of an epoxy material on the chip’s surface around the silicon nitride sheet. When