New method uses noise to make spectrometers more accurate — ScienceDaily

Optical spectrometers are instruments with a wide variety of uses. By measuring the intensity of light across different wavelengths, they can be used to image tissues or measure the chemical composition of everything from a distant galaxy to a leaf. Now researchers at the UC Davis Department of Biomedical Engineering have come up a with a new, rapid method for characterizing and calibrating spectrometers, based on how they respond to “noise.”

Rendering of prism and spectrum

Optical spectroscopy splits light and measures the intensity of different wavelengths. It is a powerful technique across a wide range of applications. UC Davis engineers Aaron Kho and Vivek Srinivasan have now found a new way to characterize and cross-calibrate spectroscopy instruments using excess “noise” in a light signal.

Spectral resolution measures how well a spectrometer can distinguish light of different wavelengths. It’s also important to be able to calibrate the spectrometer so that

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Stay-at-home orders cut noise exposure nearly in half — ScienceDaily

People’s exposure to environmental noise dropped nearly in half during the early months of the coronavirus pandemic, according to University of Michigan researchers who analyzed data from the Apple Hearing Study.

Researchers at U-M’s School of Public Health and Apple Inc. looked at noise exposure data from volunteer Apple Watch users in Florida, New York, California and Texas. The analysis, one of the largest to date, included more than a half million daily noise levels measured before and during the pandemic.

Daily average sound levels dropped approximately 3 decibels during the time that local governments made announcements about social distancing and issued stay-at-home orders in March and April, compared to January and February.

“That is a huge reduction in terms of exposure and it could have a great effect on people’s overall health outcomes over time,” said Rick Neitzel, associate professor of environmental health sciences at U-M’s School of Public

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Jaguar Land Rover Reveals Headphone-Style Noise Cancelling Tech To Cut Driver Fatigue

Driver fatigue brought on by the monotonous drone of road roar and wind noise could soon be a thing of the past, as Jaguar Land Rover reveals new noise-cancelling technology.

Similar to how headphones with ANC (active noise cancelling) work, the new system uses sensors on each wheel to monitor vibrations. These are then used to produce a sound wave through the car’s audio system that cancels out the unwanted noise, particularly low-frequency sounds up to 300Hz.

The system debuts on the new Jaguar F-Pace, new Jaguar XE, and Range Rover Velar, but is likely to soon roll-out across the rest of the JLR range.

JLR explains how the system “calculates the opposite phase sound wave needed to remove the noise heard by the

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Noise can put you off your food: Soft music can improve dining experience: Study — ScienceDaily

Noise can make or break a dining experience, according to a laboratory study replicating common noise levels in restaurants.

The acoustic experts say the study proves that high noise levels can play a major part in a dining experience — along with the quality of the food and restaurant service.

“Our study not only shows that relaxing music at low noise levels increases food enjoyment but indicates that even ‘normal’ background noise levels in restaurants can be unpleasant to diners,” says lead author, Flinders University PhD candidate Mahmoud Alamir.

“We do not always recognise the cumulative effect of noise to our stress or annoyance levels, but we see how every one of us has sensitivity to noise in different ways.”

The study considered factors such as age, gender and noise sensitivity to background noise.

Accordingly, noise-sensitive people, as well as older people and females, reported lower enjoyment of food when

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Vessel noise present year-round at Cordell Bank National Marine Sanctuary

Vessel noise present year-round at Cordell Bank National Marine Sanctuary
Credit: Oregon State University

The environment in the Cordell Bank National Marine Sanctuary off the coast of San Francisco is not a refuge from the noise generated by ship traffic, the first underwater marine acoustic study of the region has shown.


Vessel and other human sound is not currently regulated in Cordell Bank National Marine Sanctuary, but sanctuary officials are trying to learn more about its impact on animals as part of efforts to evaluate and improve the management of the ecosystem.

Noise from human activity such as vessel traffic or offshore drilling can have an impact on the health of marine animals. For example, whales rely on sound to forage, communicate, navigate and avoid predators—processes that can be hindered by human-made noise.

“Noise levels we measured at some frequencies in the sanctuary were higher than those modeled for the Channel Islands National Marine Sanctuary near the Port of Los

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Scientists fight to protect orcas from man-made noise pollution

  • Experts are studying how man-made noise pollution, like from boats and oil drilling, is threatening the lives of orcas.
  • One team of scientists is collecting hundreds of hours of orca recordings off the coast of Norway in an effort to make to region a marine protected area.
  • Man-made noises interfere with orcas’ communication, which they use for hunting and mating.
  • And orcas trying to escape the underwater cacophonies may travel too far to the rocky shoreline, which can result in stranding and death.
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Orcas have a language of their own. They communicate through touch, movement, and most importantly, sound.

And it’s marine scientist Ellyne Hamran’s job to eavesdrop on them. 

Hamran is an acoustic researcher studying the sounds marine mammals like whales and dolphins use to communicate. She’s captured hundreds of hours of orca recordings.

This summer, she’s listening to the

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JLab Audio’s New JBuds Air ANC Bridge The Gap In Making Active Noise Canceling More Affordable | Money

Full technical features include:

40+ Hours of Playtime (10+ hours of Bluetooth playtime in each earbud and 40+ additional hours from the charging case); 24+ hours total with the ANC onEarbud style for a low profile look with an easily customizable fit.Four interchangeable eartips including 3 sets of silicone gel tips, 1 set Cloud Foam eartips, and Cush FinsDual connect allows either earbud to be used independentlyC3 (crystal clear clarity) voice pickupSpeaker: Φ12mm Dynamic, Neodymium Magnet, 20Hz-20kHz, 32ΩOutput: 110±3dbMicrophone: 2 left earbud MEMS, 2 right earbud MEMS, – 38dB±3dBInput Power: DC 5V, 50mAEarbud Battery: 55mAh lithium-ion rechargeableCharging Case Battery: 500mah lithium polymer rechargeable lithium-ionEarbud Charge Time: 1.5 HoursCase Charge Time: 3 HoursQuick Charge: 15 minutes for 1+ hour playtimeStandby Time: 400 HoursRange: 30+ ft.Weight: 5g each earbud, 50g charging caseIP55 water resistance rating2-year warranty

JLab Audio is a leading personal audio company and #1 accessible True Wireless brand in America.

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Qualcomm’s new Snapdragon 750G chip brings an AI-driven noise supression tech

Qualcomm has launched a new 5G-ready processor in the Snapdragon 7xx series that is claimed to make next-gen cellular connectivity and advanced gaming features even more accessible. Welcome, the Snapdragon 750G SoC. Qualcomm’s latest mid-range 5G SoC is based on the 8nm process and uses the Kryo 570 core that is claimed to offer a 20% boost in performance, while the accompanying Adreno 619 GPU offers a 10% uptick in graphics prowess. Qualcomm says that its new SoC comes with an AI-based noise suppression tech that selectively reduces background noise for scenarios like voice chat while gaming. The AI-driven audio and voice communication suite is integrated into the new chip and is touted to offer crisp and clear voice chat experience.  

The chipmaker claims that its new octa-core SoC offers a truly global 5G experience by bundling support for both mmWave and sub-6GHz bands, NSA and

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