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First wearable device for vocal fatigue senses when your voice needs a break

EVANSTON, Ill. — Northwestern University researchers have developed the first smart wearable device to continuously track how much people use their voices,…

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EVANSTON, Ill. — Northwestern University researchers have developed the first smart wearable device to continuously track how much people use their voices, alerting them to overuse before vocal fatigue and potential injury set in.

Credit: Northwestern University

  • Vocal fatigue is a common condition caused by overuse
  • Sensors provide awareness around how much wearers use their voices, with the goal to prevent vocal fatigue and further injury
  • Developed by biomedical engineers and opera singers, the small, soft, flexible, wireless device sits on upper chest to monitor vocal activity in real time
  • Using Bluetooth, data is streamed to an app, where machine-learning algorithms distinguish singing from speaking, independent of ambient sounds

EVANSTON, Ill. — Northwestern University researchers have developed the first smart wearable device to continuously track how much people use their voices, alerting them to overuse before vocal fatigue and potential injury set in.

The first-of-its-kind, battery-powered, wireless device and accompanying algorithms could be a game-changer for professional singers, teachers, politicians, call-center workers, coaches and anyone who relies on their voices to communicate effectively and make a living. It also could help clinicians remotely and continuously monitor patients with voice disorders throughout their treatment.

Developed by an interdisciplinary team of materials scientists, biomedical engineers, opera singers and a speech-language pathologist, the research behind the new technology will be published during the week of Feb. 20 in the Proceedings of the National Academy of Sciences.

The soft, flexible, postage-stamp-sized device comfortably adheres to the upper chest to sense the subtle vibrations associated with talking and singing. From there, the captured data is instantaneously streamed via Bluetooth to the users’ smartphone or tablet, so they can monitor their vocal activities in real time throughout the day and measure cumulative total vocal usage. Custom machine-learning algorithms distinguish the difference between speaking and singing, enabling singers to separately track each activity.

With the app, users can set their personalized vocal thresholds. When they near that threshold, their smartphone, smartwatch or an accompanying device located on the wrist provides real-time haptic feedback as an alert. Then, they can rest their voices before pushing it too far.

“The device precisely measures the amplitude and frequency for speaking and singing,” said Northwestern’s John A. Rogers, a bioelectronics pioneer who led the device’s development. “Those two parameters are most important in determining the overall load that’s occurring on the vocal folds. Being aware of those parameters, both at a given instant and cumulatively over time, is essential for managing healthy patterns of vocalization.”

“It’s easy for people to forget how much they use their voice,” said Northwestern’s Theresa Brancaccio, a voice expert who co-led the study. “Seasoned classical singers tend to be more aware of their vocal usage because they have lived and learned. But some people — especially singers with less training or people, like teachers, politicians and sports coaches, who must speak a lot for their jobs — often don’t realize how much they are pushing it. We want to give them greater awareness to help prevent injury.”

Rogers is the Louis Simpson and Kimberly Querrey Professor of Materials Science and Engineering, Biomedical Engineering and Neurological Surgery in the McCormick School of Engineering and Northwestern University Feinberg School of Medicine. He also is director of the Querrey Simpson Institute for Bioelectronics. A distinguished operatic performer, mezzo-soprano, Brancaccio is a senior lecturer at Northwestern’s Bienen School of Music, where she teaches voice and vocal pedagogy.

Unaware of overuse

For the millions of people in the U.S. who make their livings by speaking or singing, vocal fatigue is a constant, looming threat. The common condition occurs when overused vocal folds swell, making the voice sound raspy and lose endurance. Vocal fatigue negatively affects singers, in particular, altering their abilities to sing clearly or hit the same notes as their healthy voice can. At best, one short period of vocal fatigue can briefly interrupt a singer’s plans. At worst, it can lead to enough damage to derail a career.

Lack of awareness is the underlying problem. People rarely make the connection between vocal activities and how those activities affect their voices. Although one in 13 U.S. adults have experienced vocal fatigue, most people don’t notice they are overusing their voices until hoarseness already has set in.

“What leads people into trouble is when events stack up,” Brancaccio said. “They might have rehearsals, teach lessons, talk during class discussions and then go to a loud party, where they have to yell over the background noise. Then, throw a cold or illness into the mix. People have no idea how much they are coughing or clearing their throats. When these events stack up for days, that can put major stress on the voice.”

Cross-disciplinary connection

As an advocate for vocal health, Brancaccio has spent decades exploring ways to keep her students mindful of how much they use their voices. In 2009, she challenged her students to keep a paper budget — physically writing down every time they spoke, sang and drank water, among other things. About 10 years later, she converted the system into Singer Savvy, an app that offers a personalized vocal budget for each user and helps users stay within that budget.

Separately, Rogers, in collaboration with researchers at the Shirley Ryan AbilityLab, had developed a wireless wearable device to track swallowing and speech in stroke patients. The bandage-like sensor measures swallowing abilities and speech patterns to monitor stroke patients’ recovery processes. In the early weeks of the COVID-19 pandemic, Rogers’ team modified the technology to monitor coughing, as a key symptom of the illness.

“I wanted to gather more data and make our tracking system more precise and more accurate,” Brancaccio said. “So, I reached out to John to see if his sensors could help us gather more information.”

“I thought it was a great opportunity for us to extend our technologies beyond our very important, but narrowly targeted, uses in health care to something that might capture a broader population of users,” Rogers said. “Anyone who uses their voice extensively could benefit.”

The pair also partnered with speech pathologist and voice expert Aaron M. Johnson to explore how the devices could be used to evaluate and monitor treatment for patients with vocal disorders. Johnson, who co-directs the NYU Langone’s Voice Center, said the small, wireless device could help track patients’ voices in the real world — outside of a clinical setting.

“A key part of voice therapy is helping people change how — and how much — they use their voice,” said Johnson, study co-author and associate professor in the department of otolaryngology at NYU Grossman School of Medicine. “This device will enable patients and their clinicians to understand voice use patterns and make adjustments in vocal demand to reduce vocal fatigue and speed recovery from voice disorders. Generalizing vocal techniques and exercises from therapy sessions into daily life is one of the most challenging aspects of voice therapy, and this device could greatly enhance that process.”

Singer-trained algorithms

The team modified Rogers’ existing devices to precisely measure vocal load over time. That includes frequency, volume, amplitude, duration and time of day. Like Rogers’ previous devices for COVID-19 and stroke patients, the new device also senses vibrations rather than recording audio. This enables the device to detect vocal activity precisely from the user, rather than the ambient noise surrounding them.

The biggest challenge was to develop algorithms capable of distinguishing speaking from singing. To overcome this challenge, Brancaccio recruited voice and opera students to undertake a variety of singing exercises to train the machine-learning algorithms. A team of classical singers with different vocal ranges — varying from bass to soprano — wore the devices while humming, singing staccato scales and songs, reading and more. Each singer generated 2,500 one-second-long windows of singing and 2,500 one-second-long windows of speaking.

The resulting algorithm can separate singing from speaking with more than 95% accuracy. And, when used in a choir setting, the device captures only data from the wearer and not noise from nearby singers.

“Prolonged talking is one of the most fatiguing activities for people who are training to become professional singers,” Brancaccio said. “By separating singing and speaking, it can help people develop more awareness around how much they are speaking. There is evidence that even brief 15- to 20-minute periods of total silence interspersed throughout the day can help vocal fold tissues recover and repair.”

How to use it

To use the device, the wearer simply adheres it to the sternum, below the neck, and syncs the device with the accompanying app. Rogers’ team currently is working on a method to personalize vocal budgets for each user. Here, users will press a button in the app if they experience vocal discomfort at any point during the day, effectively capturing the instantaneous and cumulative vocal load at the time. These data can serve as a personalized threshold for vocal fatigue. When the user nears or exceeds their personalized threshold, a haptic device will vibrate as an alert. 

Similar in size and form to a wristwatch, this haptic device includes multiple motors that can activate in different patterns and with varying levels of intensity to convey different messages. Users also can monitor a graphical display within the app, which splits information into speaking and singing categories.

“It uses Bluetooth, so it can talk to any device that has a haptic motor embedded,” Rogers said. “So, you don’t have to use our wristband. You could just leverage a standard smart watch for haptic feedback.”

Although other vocal-monitoring devices do exist, those use big collars, tethering wires and bulky equipment. Some also use embedded microphones to capture audible vocal data, leading to privacy concerns.

“Those don’t work for continuous monitoring in a real environment,” Brancaccio said. “Instead of wearing cumbersome, wired equipment, I can stick on this soft, wearable device. Once it’s on, I don’t even notice it. It’s super light and easy.”

What’s next

Because Rogers’ previous devices capture body temperature, heart rates and respiratory activity, the researchers included those capabilities in the vocal-monitoring device. They believe these extra data will help to explore fundamental research questions concerning vocal fatigue.

“This is more speculative, but it might be interesting to see how physical activity affects vocal fatigue,” Rogers said. “If someone is dancing while singing, is that more stressful on the vocal folds compared to someone who is not physically exerting themselves? Those are the kinds of questions we can ask and quantitatively answer.”

In the meantime, Brancaccio is excited for her students to have a tool that can help prevent injury. She hopes others — including non-singers — will see the benefit to keeping their vocal cords healthy.

“Your voice is part of your identity — whether you are a singer or not,” she said. “It’s integral to daily life, and it’s worth protecting.”

The study, “Closed-loop network of skin-interfaced wireless devices for quantifying vocal fatigue and providing user feedback,” was supported by the Querrey Simpson Institute for Bioelectronics at Northwestern University.


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Key shipping company files for Chapter 11 bankruptcy

The Illinois-based general freight trucking company filed for Chapter 11 bankruptcy to reorganize.

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The U.S. trucking industry has had a difficult beginning of the year for 2024 with several logistics companies filing for bankruptcy to seek either a Chapter 7 liquidation or Chapter 11 reorganization.

The Covid-19 pandemic caused a lot of supply chain issues for logistics companies and also created a shortage of truck drivers as many left the business for other occupations. Shipping companies, in the meantime, have had extreme difficulty recruiting new drivers for thousands of unfilled jobs.

Related: Tesla rival’s filing reveals Chapter 11 bankruptcy is possible

Freight forwarder company Boateng Logistics joined a growing list of shipping companies that permanently shuttered their businesses as the firm on Feb. 22 filed for Chapter 7 bankruptcy with plans to liquidate.

The Carlsbad, Calif., logistics company filed its petition in the U.S. Bankruptcy Court for the Southern District of California listing assets up to $50,000 and and $1 million to $10 million in liabilities. Court papers said it owed millions of dollars in liabilities to trucking, logistics and factoring companies. The company filed bankruptcy before any creditors could take legal action.

Lawsuits force companies to liquidate in bankruptcy

Lawsuits, however, can force companies to file bankruptcy, which was the case for J.J. & Sons Logistics of Clint, Texas, which on Jan. 22 filed for Chapter 7 liquidation in the U.S. Bankruptcy Court for the Western District of Texas. The company filed bankruptcy four days before the scheduled start of a trial for a wrongful death lawsuit filed by the family of a former company truck driver who had died from drowning in 2016.

California-based logistics company Wise Choice Trans Corp. shut down operations and filed for Chapter 7 liquidation on Jan. 4 in the U.S. Bankruptcy Court for the Northern District of California, listing $1 million to $10 million in assets and liabilities.

The Hayward, Calif., third-party logistics company, founded in 2009, provided final mile, less-than-truckload and full truckload services, as well as warehouse and fulfillment services in the San Francisco Bay Area.

The Chapter 7 filing also implemented an automatic stay against all legal proceedings, as the company listed its involvement in four legal actions that were ongoing or concluded. Court papers reportedly did not list amounts for damages.

In some cases, debtors don't have to take a drastic action, such as a liquidation, and can instead file a Chapter 11 reorganization.

Truck shipping products.

Shutterstock

Nationwide Cargo seeks to reorganize its business

Nationwide Cargo Inc., a general freight trucking company that also hauls fresh produce and meat, filed for Chapter 11 bankruptcy protection in the U.S. Bankruptcy Court for the Northern District of Illinois with plans to reorganize its business.

The East Dundee, Ill., shipping company listed $1 million to $10 million in assets and $10 million to $50 million in liabilities in its petition and said funds will not be available to pay unsecured creditors. The company operates with 183 trucks and 171 drivers, FreightWaves reported.

Nationwide Cargo's three largest secured creditors in the petition were Equify Financial LLC (owed about $3.5 million,) Commercial Credit Group (owed about $1.8 million) and Continental Bank NA (owed about $676,000.)

The shipping company reported gross revenue of about $34 million in 2022 and about $40 million in 2023.  From Jan. 1 until its petition date, the company generated $9.3 million in gross revenue.

Related: Veteran fund manager picks favorite stocks for 2024

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Key shipping company files Chapter 11 bankruptcy

The Illinois-based general freight trucking company filed for Chapter 11 bankruptcy to reorganize.

Published

on

The U.S. trucking industry has had a difficult beginning of the year for 2024 with several logistics companies filing for bankruptcy to seek either a Chapter 7 liquidation or Chapter 11 reorganization.

The Covid-19 pandemic caused a lot of supply chain issues for logistics companies and also created a shortage of truck drivers as many left the business for other occupations. Shipping companies, in the meantime, have had extreme difficulty recruiting new drivers for thousands of unfilled jobs.

Related: Tesla rival’s filing reveals Chapter 11 bankruptcy is possible

Freight forwarder company Boateng Logistics joined a growing list of shipping companies that permanently shuttered their businesses as the firm on Feb. 22 filed for Chapter 7 bankruptcy with plans to liquidate.

The Carlsbad, Calif., logistics company filed its petition in the U.S. Bankruptcy Court for the Southern District of California listing assets up to $50,000 and and $1 million to $10 million in liabilities. Court papers said it owed millions of dollars in liabilities to trucking, logistics and factoring companies. The company filed bankruptcy before any creditors could take legal action.

Lawsuits force companies to liquidate in bankruptcy

Lawsuits, however, can force companies to file bankruptcy, which was the case for J.J. & Sons Logistics of Clint, Texas, which on Jan. 22 filed for Chapter 7 liquidation in the U.S. Bankruptcy Court for the Western District of Texas. The company filed bankruptcy four days before the scheduled start of a trial for a wrongful death lawsuit filed by the family of a former company truck driver who had died from drowning in 2016.

California-based logistics company Wise Choice Trans Corp. shut down operations and filed for Chapter 7 liquidation on Jan. 4 in the U.S. Bankruptcy Court for the Northern District of California, listing $1 million to $10 million in assets and liabilities.

The Hayward, Calif., third-party logistics company, founded in 2009, provided final mile, less-than-truckload and full truckload services, as well as warehouse and fulfillment services in the San Francisco Bay Area.

The Chapter 7 filing also implemented an automatic stay against all legal proceedings, as the company listed its involvement in four legal actions that were ongoing or concluded. Court papers reportedly did not list amounts for damages.

In some cases, debtors don't have to take a drastic action, such as a liquidation, and can instead file a Chapter 11 reorganization.

Truck shipping products.

Shutterstock

Nationwide Cargo seeks to reorganize its business

Nationwide Cargo Inc., a general freight trucking company that also hauls fresh produce and meat, filed for Chapter 11 bankruptcy protection in the U.S. Bankruptcy Court for the Northern District of Illinois with plans to reorganize its business.

The East Dundee, Ill., shipping company listed $1 million to $10 million in assets and $10 million to $50 million in liabilities in its petition and said funds will not be available to pay unsecured creditors. The company operates with 183 trucks and 171 drivers, FreightWaves reported.

Nationwide Cargo's three largest secured creditors in the petition were Equify Financial LLC (owed about $3.5 million,) Commercial Credit Group (owed about $1.8 million) and Continental Bank NA (owed about $676,000.)

The shipping company reported gross revenue of about $34 million in 2022 and about $40 million in 2023.  From Jan. 1 until its petition date, the company generated $9.3 million in gross revenue.

Related: Veteran fund manager picks favorite stocks for 2024

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Tight inventory and frustrated buyers challenge agents in Virginia

With inventory a little more than half of what it was pre-pandemic, agents are struggling to find homes for clients in Virginia.

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No matter where you are in the state, real estate agents in Virginia are facing low inventory conditions that are creating frustrating scenarios for their buyers.

“I think people are getting used to the interest rates where they are now, but there is just a huge lack of inventory,” said Chelsea Newcomb, a RE/MAX Realty Specialists agent based in Charlottesville. “I have buyers that are looking, but to find a house that you love enough to pay a high price for — and to be at over a 6.5% interest rate — it’s just a little bit harder to find something.”

Newcomb said that interest rates and higher prices, which have risen by more than $100,000 since March 2020, according to data from Altos Research, have caused her clients to be pickier when selecting a home.

“When rates and prices were lower, people were more willing to compromise,” Newcomb said.

Out in Wise, Virginia, near the westernmost tip of the state, RE/MAX Cavaliers agent Brett Tiller and his clients are also struggling to find suitable properties.

“The thing that really stands out, especially compared to two years ago, is the lack of quality listings,” Tiller said. “The slightly more upscale single-family listings for move-up buyers with children looking for their forever home just aren’t coming on the market right now, and demand is still very high.”

Statewide, Virginia had a 90-day average of 8,068 active single-family listings as of March 8, 2024, down from 14,471 single-family listings in early March 2020 at the onset of the COVID-19 pandemic, according to Altos Research. That represents a decrease of 44%.

Virginia-Inventory-Line-Chart-Virginia-90-day-Single-Family

In Newcomb’s base metro area of Charlottesville, there were an average of only 277 active single-family listings during the same recent 90-day period, compared to 892 at the onset of the pandemic. In Wise County, there were only 56 listings.

Due to the demand from move-up buyers in Tiller’s area, the average days on market for homes with a median price of roughly $190,000 was just 17 days as of early March 2024.

“For the right home, which is rare to find right now, we are still seeing multiple offers,” Tiller said. “The demand is the same right now as it was during the heart of the pandemic.”

According to Tiller, the tight inventory has caused homebuyers to spend up to six months searching for their new property, roughly double the time it took prior to the pandemic.

For Matt Salway in the Virginia Beach metro area, the tight inventory conditions are creating a rather hot market.

“Depending on where you are in the area, your listing could have 15 offers in two days,” the agent for Iron Valley Real Estate Hampton Roads | Virginia Beach said. “It has been crazy competition for most of Virginia Beach, and Norfolk is pretty hot too, especially for anything under $400,000.”

According to Altos Research, the Virginia Beach-Norfolk-Newport News housing market had a seven-day average Market Action Index score of 52.44 as of March 14, making it the seventh hottest housing market in the country. Altos considers any Market Action Index score above 30 to be indicative of a seller’s market.

Virginia-Beach-Metro-Area-Market-Action-Index-Line-Chart-Virginia-Beach-Norfolk-Newport-News-VA-NC-90-day-Single-Family

Further up the coastline on the vacation destination of Chincoteague Island, Long & Foster agent Meghan O. Clarkson is also seeing a decent amount of competition despite higher prices and interest rates.

“People are taking their time to actually come see things now instead of buying site unseen, and occasionally we see some seller concessions, but the traffic and the demand is still there; you might just work a little longer with people because we don’t have anything for sale,” Clarkson said.

“I’m busy and constantly have appointments, but the underlying frenzy from the height of the pandemic has gone away, but I think it is because we have just gotten used to it.”

While much of the demand that Clarkson’s market faces is for vacation homes and from retirees looking for a scenic spot to retire, a large portion of the demand in Salway’s market comes from military personnel and civilians working under government contracts.

“We have over a dozen military bases here, plus a bunch of shipyards, so the closer you get to all of those bases, the easier it is to sell a home and the faster the sale happens,” Salway said.

Due to this, Salway said that existing-home inventory typically does not come on the market unless an employment contract ends or the owner is reassigned to a different base, which is currently contributing to the tight inventory situation in his market.

Things are a bit different for Tiller and Newcomb, who are seeing a decent number of buyers from other, more expensive parts of the state.

“One of the crazy things about Louisa and Goochland, which are kind of like suburbs on the western side of Richmond, is that they are growing like crazy,” Newcomb said. “A lot of people are coming in from Northern Virginia because they can work remotely now.”

With a Market Action Index score of 50, it is easy to see why people are leaving the Washington-Arlington-Alexandria market for the Charlottesville market, which has an index score of 41.

In addition, the 90-day average median list price in Charlottesville is $585,000 compared to $729,900 in the D.C. area, which Newcomb said is also luring many Virginia homebuyers to move further south.

Median-Price-D.C.-vs.-Charlottesville-Line-Chart-90-day-Single-Family

“They are very accustomed to higher prices, so they are super impressed with the prices we offer here in the central Virginia area,” Newcomb said.

For local buyers, Newcomb said this means they are frequently being outbid or outpriced.

“A couple who is local to the area and has been here their whole life, they are just now starting to get their mind wrapped around the fact that you can’t get a house for $200,000 anymore,” Newcomb said.

As the year heads closer to spring, triggering the start of the prime homebuying season, agents in Virginia feel optimistic about the market.

“We are seeing seasonal trends like we did up through 2019,” Clarkson said. “The market kind of soft launched around President’s Day and it is still building, but I expect it to pick right back up and be in full swing by Easter like it always used to.”

But while they are confident in demand, questions still remain about whether there will be enough inventory to support even more homebuyers entering the market.

“I have a lot of buyers starting to come off the sidelines, but in my office, I also have a lot of people who are going to list their house in the next two to three weeks now that the weather is starting to break,” Newcomb said. “I think we are going to have a good spring and summer.”

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