Henley ear wax removal
Henley ear wax removal conducted at the Henley Hearing Clinic. If you are experiencing excessive ear wax or are having issues with your ears being blocked we can help. We are a fully accredited and regulated ear wax removal centre for the whole of Bucks. Using Microsuction to remove excessive ear wax is painless and very quick. If you prefer the older technique of ear wax removal using water irrigation (ear syringing), we can do that too!
Click here to see how we use Microsuction.
Please call reception to make a booking of either ear wax removal or other services at the Henley Hearing Clinic.
Henley ear wax removal
If you are in the Chalfont area then theChalfont hearing centre is the place to get your ear wax removed. Sitting between Rickmansworth and Amersham, Little Chalfont serves perfectly for those who are in the North of Buckinghamshire county. Chalfont hearing also dispenses the very latest in digital hearing aids and conducts hearing tests. This really is a non stop hearing centre just like The Henley hearing Clinic.
Henley Hearing Clinic News:
BIHIMA Round Table Event Focused on Connection Between Hearing Loss and Dementia
A cross-sector summit was held last month, bringing together experts to discuss the connection between hearing loss as a risk factor in developing dementia, as well as highlighting the preventative role of hearing technology. The round table event was convened by the British and Irish Hearing Instrument Manufacturers Association (BIHIMA) on February 28, 2019 at the Royal College of General Practitioners in London, BIHIMA announced.
A series of podcasts of the event’s discussion has been created in order to spread greater understanding, available for download here.
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The event united audiologists, research scientists, and representatives from the media and charity sectors, to share knowledge and develop strategies to get the crucial message out into the public arena, so the proven link between the two conditions is taken seriously by individuals and policymakers.
There is growing evidence of the connection between the two conditions, including a Lancet study which showed that midlife hearing loss may account for up to 9.1% of preventable dementia cases worldwide and is a modifiable risk factor in developing the condition1. Dr Sergi Costafreda Gonzalez, co-author of the study, attended the Round Table.
There is less research, however, into the mitigating benefits of hearing aids. A University of Manchester study2 showed the rate of age-related cognitive decline is 75% less following the adoption of hearing devices. Co-author of this study, Dr Asri Maharani, shared details of these findings on the day. Further studies are now underway but this remains an undeveloped area, and so last month’s forum called publicly for further trials.
The panel also called on policymakers to make this area a funding priority. As new data emerges which proves the impact of hearing aids in preventing dementia, this will provide greater economic argument for making hearing technology more available to those at risk of cognitive decline.
Henley ear wax removal
“The better we understand cognitive decline and why hearing aid use helps, the better we can design intervention,” said Dr Helene Amieva, author of the 25-year study, “Death, Depression, Disability, and Dementia Associated with Self-reported Hearing Problems.”3
The panel also strongly recommended a cross-sector approach, whereby hearing loss is understood as part of a wider discussion which links with both neuroscience and social issues around isolation and wellbeing in the aging population.
“Dementia is a condition which affects 47 million people globally and is fast becoming a social care crisis. There is no time to waste in understanding the role of hearing technology which could stem the tide of the disease, and in educating people about looking after both their hearing and cognitive health,” said the BIHIMA Chairman, Paul Surridge.
BIHIMA PANEL ATTENDEES:
Paul Surridge, BIHIMA Chairman
Helene Amieva, PhD, author of: “Death, Depression, Disability, and Dementia Associated with Self-reported Hearing Problems: A 25-Year Study,” Inserm, University of Bordeaux
Dr Sergi Costafreda Gonzalez, co-author of the study: “Dementia prevention, intervention and care,” The Lancet, University College London
Tony Gunnell, audiologist (BIHIMA representative)
Peter Kunzmann, head of research and policy, Action on Hearing Loss
Dr Asri Maharani, co-author of the study: ‘Longitudinal Relationship Between Hearing Aid Use and Cognitive Function in Older Americans’, University of Manchester
Source: BIHIMA, The Lancet, Journal of the American Geriatrics Society, The Journals of Gerontology
Livingston G, Sommerlad A, Orgeta V, et al. Dementia prevention, intervention, and care. The Lancet. 2017;390(10113):P2673-2734.
Maharani A, Dawes P, Nazroo J, Tampubolon G, Pendleton N. Longitudinal relationship between hearing aid use and cognitive function in older Americans. Journal of the American Geriatrics Society. 2018;66(6):1130-1136.
Amieva H, Ouvrard C, Meillon C, Rullier L, Dartigues J-F. Death, depression, disability, and dementia associated with self-reported hearing problems: A 25-year study. The Journals of Gerontology. 2018;73(10):1383-1389.
Earwax removal at The Henley hearing Clinic Buckinghamshire
Earwax removal at The Henley Hearing Clinic. The hearing clinic is a premier private family run business with Leon Cox at the helm. Hearing tests and hearing aids are to be found at the Henley Hearing Clinic alongside ear wax removal using Micro-suction or the traditional water irrigation technique (ear syringing).
The very latest digital hearing aids by all the main manufacturers are available. Trail hearing aids are also available but please as Leon for a more comprehensive idea how this works in the Henley area.
Book now for your ear wax removal or for a hearing test.
Henley Hearing Clinic, News:
GN Hearing Launches AI Personalized Hearing Solutions
GN Hearing announced that it has launched “the world’s first” hearing solutions that intuitively adapt to a hearing aid user’s personal preferences in any given sound environment. This breakthrough technology employs GN’s artificial intelligence (AI) solution in tandem with Apple’s Siri virtual assistant. The announcement was made at the Consumer Electronics Show (CES) 2019 in Las Vegas.
It follows GN’s longstanding commitment to progressing hearing aid technologies through extensive research and development programs. This new offering follows years of investment in GN’s dedicated in-house AI research center, investments in AudEERING, and extensive collaboration with other partners and academic research institutes. The launch helps to extend GN’s innovation footprint and partnership philosophy in the hearing care industry by what GN calls an “intuitive and personalized hearing solution.”
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“At GN, we believe that technology is at its best when it helps address people’s everyday needs and challenges,” said Marcus Desimoni, CFO of GN and Interim CEO of GN Hearing. “Employing AI technology in GN’s products brings this specific technology and innovation to the hearing aid space and is the first step in the journey to create a seamless hearing experience that will allow hearing aid users to ‘forget’ that they are wearing one. This is core to GN’s purpose of making life sound better.”
The new offering is an added benefit to the company’s latest 2.4 GHz product portfolio from ReSound and Beltone, and it will be reaching users in February 2019. Through the use of AI, GN expects to deliver a continuous stream of new user benefits through future software releases. This will enable users to always be at the forefront of innovation by updating existing GN Hearing instruments with new features.
Hearing tests Henley
When GN was established 150 years ago, the company introduced the world’s first telegraph line from Europe to Asia, creating the Internet of its time. It is this same pioneering spirit that is being applied today to transform lives, helping people hear more, do more, and be more than they ever thought possible.
Source: GN Hearing
Beaconsfield hearing aids
The Henley Hearing Clinic covers the whole of Buck including Beaconsfield and Amersham, Watford, Harpsden, Twyford. Suppliers of high end digital hearing aids including hearing accessories, hearing aid batteries and ear wax removal. Leon Cox the lead audiologist at The Henley Hearing Clinic is a highly experienced expert on hearing and hearing tests. Please book an appointment if you need Micro-suction ear wax removal.
Henley Hearing Clinc News:
Original story by:The Hearing Review
Researchers Identify Gene Associated with Age-related Hearing Loss
An international group of researchers, led by Ronna Hertzano, MD, PhD, associate professor, Department of Otorhinolaryngology-Head & Neck Surgery, at the University of Maryland School of Medicine (UMSOM), and Michael Bowl, PhD, program leader track scientist, Mammalian Genetics Unit, MRC Harwell Institute, UK, have identified the gene that acts as a key regulator for special cells needed in hearing.
The discovery of this gene (Ikzf2) will help researchers better understand this unique type of cell that is needed for hearing and potentially develop treatments for common age-related hearing loss, UMSOM announced.
Bucks hearing aids
“Outer hair cells are the first inner ear cells lost as we age,” said Hertzano, whose research will be published in the journal Nature. “Age-related hearing loss happens to everyone. Even a 30-year-old has lost some of the outer hair cells that sense higher pitch sounds. Simple exposure to sound, especially loud ones, eventually causes damage to these cells.”
The inner ear has two kinds of sensory hair cells required for hearing. The inner hair cells convert sounds to neural signals that travel to the brain. This compares to outer hair cells, which function by amplifying and tuning sounds. Without outer hair cells, sound is severely muted and inner hair cells don’t signal the brain. Loss of outer hair cells is said to be the major cause of age-related loss of hearing.
About the Research
Hertzano’s group, in collaboration with Ran Elkon, PhD, senior lecturer, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine in Tel Aviv, Israel, took a bioinformatics and functional genomics approach to discover a gene critical for the regulation of genes involved in outer hair cell development. Bowl’s group studied mice from the Harwell Aging Screen to identify mice with hearing loss. Bowl identified mice with an early-onset hearing loss caused by an outer hair cell deficit. When the two groups realized that they were studying the same gene, they began to collaborate to discover its biological function and role in outer hair cell development. The gene is Ikzf2 gene, which encodes helios. Helios is a transcription factor, a protein that controls the expression of other genes. The mutation in the mice changes one amino acid in a critical part of the protein, which impaired the transcriptional regulatory activity of helios in the mice.
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To test if helios could drive the differentiation of outer hair cells, the researchers introduced a virus engineered to overexpress helios into the inner ear hair cells of newborn mice. As a result, some of the mature inner hair cells became more like outer hair cells. In particular, the inner hair cells with an excess of helios started making the protein prestin and exhibited electromotility, a property limited to outer hair cells. Thus, helios can drive inner hair cells to adopt critical outer hair cell characteristics.
Funding for the research was provided by Action on Hearing Loss UK, the National Institute on Deafness and Other Communication Disorders (NIDCD) at the National Institutes of Health, and the Department of Defense (DOD).
As Professor Steve Brown, PhD, director, MRC Harwell Institute, said, “The development of therapies for age-related hearing loss represents one of the big challenges facing medicine and biomedical science. Understanding the genetic programs that are responsible for the development and maturation of sound-transducing hair cells within the inner ear will be critical to exploring avenues for the regeneration of these cells that are lost in abundance during age-related hearing loss. The teams from the University of Maryland and the MRC Harwell Research Institute have given us the first insights into that program. They have identified a master regulator, Ikzf2/helios, that controls the program for maturation of outer hair cells. Now, we have a target that we can potentially use to induce the production of outer hair cells within damaged inner ears, and we are one step closer to offering treatments for this disabling condition.”
Original Paper: Chessum L, Matern MS, Kelly MC, et al. Helios is a key transcriptional regulator of outer hair cell maturation. Nature. November 21, 2018.
Source: University of Maryland School of Medicine, Nature
Image: University of Maryland School of Medicine
Cheapest hearing aids Henley?
The latest hearing aids in Henley
We may not be the cheapest hearing aids in Buckinghamshire, but we are very competitive and an independent small family owned company. Your ears deserve the best, we are the best in the Henley and Bucks area (according to our receptionist).
Unlike the larger high street companies, when you visit us you will be seen by the same person each time! This make a huge difference for your treatment and dispensing. Consistency is key when it comes to ear health. We don’t have the buying power of the major companies but we are pretty close. We offer what the majors don’t. We offer one to one ongoing treatment and advice with the same person who you will get to know and we will get to know you. For most of our clients we are almost family as we know each other so well.
If you feel like you need advice before you buy a new hearing aid or a set of hearing aids we are happy to trial these so you are 100% happy before you purchase. Please ask our receptionist or Leon Cox our lead audiologist for more info.
We are committed to make sure you are happy and content with your hearing aids, so always here to make sure you get the best from them and us. We will always try and fit you in as soon as possible if you are in need to see us urgently.
Ear wax removal Henley, Bucks
We also conduct ear wax removal using Micro-suction, and the traditional water irrigation technique, along with hearing test, hearing batteries and hearing aid repairs.
Hearing aids, Buckinghamshire
Henley Hearing Clinic is an independent hearing specialist centre based in Henley Bucks. We specialise in the very latest hearing aids that will transform your life. The new 2018 digital hearing aids are a joy to use, connecting with your Iphone or most Android smart phones that are on the market today. You can really hear the benefits of the latest hearing tech, so why not book in and have a hearing test today and discuss your needs.
Henley hearing News:
Swedish University Researchers Develop New Test for Balance Disorders
Many individuals over age 65 suffer from dizziness and problems with balance; however, tests to identify the causes of such problems are often painful and can risk hearing damage. Now, researchers from Chalmers University of Technology have developed a new testing device using bone conduction technology that is said to offer “significant advantages” over current tests, the Sweden-based university announced.
A Vestibular Evoked Myogenic Potentials (VEMP) test uses loud sounds to evoke a muscle reflex contraction in the neck and eye muscles, triggered by the vestibular system—the system responsible for our balance. The Chalmers researchers have now used bone-conducted sounds to achieve what they say are better results.
“We have developed a new type of vibrating device that is placed behind the ear of the patient during the test,” said Bo Håkansson, a professor in the research group ‘Biomedical signals and systems’ at Chalmers.
The vibrating device is small and compact in size, and optimized to provide an adequate sound level for triggering the reflex at frequencies as low as 250 Hz. Previously, no vibrating device has been available that was directly adapted for this type of test of the balance system.
Henley hearing aids, Bucks
In bone-conduction transmission, sound waves are transformed into vibrations through the skull, stimulating the cochlea within the ear, in the same way as sound waves go through the ear canal, the eardrum, and the middle ear. Håkansson has over 40 years of experience in this field and has previously developed hearing aids using this technology.
The cause of dizziness can be difficult to diagnose for several reasons. In 50% of cases, dizziness is due to problems in the vestibular system. But today’s VEMP methods have major shortcomings, and can cause hearing loss and discomfort for patients.
For example, the VEMP test uses very high sound levels, and may, in fact, cause permanent hearing damage itself, according to the university’s press release. And, if the patient already suffers from certain types of hearing loss, it may be impossible to draw any conclusions from the test. The Chalmers researchers’ new method offers significant advantages.
“Thanks to this bone conduction technology, the sound levels which patients are exposed to can be minimized,” said postdoctoral researcher Karl-Johan Fredén Jansson, who made all the measurements in the project. “The previous test was like a machine gun going off next to the ear—with this method it will be much more comfortable. The new vibrating device provides a maximum sound level of 75 decibels. The test can be performed at 40 decibels lower than today’s method using air-conducted sounds through headphones. This eliminates any risk that the test itself could cause hearing damage.”
The benefits also include safer testing for children as well as patients with impaired hearing function due to chronic ear infections or congenital malformations in the ear canal and middle ear.
Ear wax removal Henley, Bucks
The vibrating device is compatible with standardized equipment for balance diagnostics in healthcare and the cost of the new technology is estimated to be lower than the corresponding equipment used today.
A pilot study has been conducted and recently published. The next step is to conduct a larger patient study in collaboration with Sahlgrenska University Hospital in Gothenburg, where 30 participants with normal hearing will also be included.
More about the research
The scientific article “VEMP using a new low-frequency bone conduction transducer” has recently been published by Dove Medical Press, in the journal Medical Devices: Evidence and Research.
Chalmers’ partners in the study are the Sahlgrenska Academy at the University of Gothenburg, and the Danish audio companies Ortofon andInteracoustics. Grants for this project are received from Vinnova (Swedish Innovations Agency) and Hörselskadades Riksförbund (Hearing Impairment Federation).
Original Paper: Håkansson B, Fredén Jansson K-J, Tengstrand T, et al. VEMP using a new low-frequency bone conduction transducer. Medical Devices: Evidence and Research. 2018;11:301-312.
Source: Chalmers University of Technology, Medical Devices: Evidence and Research
Image: Johan Bodell/Chalmers University of Technology
Earwax removal specialists in Bucks
The Henley hearing clinic based in Henley on Thames are rated as one of the best places in Bucks to get your ears removed of wax.
If you have the older analogue hearing aid and are looking to open up your hearing to the very latest digital hearing aid. Leon Cox the lead audiologist based at the Henley and Chalfont hearing Centre & Clinics is the man to talk to.
Henley are a leading clinic that has the latest technology to test your hearing, clean your ears (wax removal) and dispense the latest digital hearing aids. Along with hearing aid batteries and accessories.
Henley hearing clinic news:
GN Hearing Launches Rechargeable Battery Option for ReSound Linx 3D
GN Hearing—the medical device division of the GN Group—has introduced a rechargeable battery option for the ReSound LiNX 3D hearing aids, the company announced. The rechargeable battery solution, available in North America and other major markets from September 1, gives ReSound users more options to choose from. The rechargeable option is also available for Beltone Trust in North America, and from September 1, this will be extended to other major markets.
The rechargeable battery option is made available based on an understanding of user expectations as well as a commitment to empower users to choose the solution best suited for their needs and preferences. The announcement follows GN Hearing’s release of the innovative 5thgeneration 2.4 GHz wireless technology ReSound LiNX 3D hearing aids, which offer unmatched sound quality, an enhanced fitting experience, and comprehensive remote fine-turning, giving users a new hearing care experience, GN Hearing said.
According to the company, ReSound LiNX 3D rechargeable has all of the benefits of ReSound LiNX 3D, now combined with the all-day power of a rechargeable battery. With overnight charging, users will experience the advantage of all-day power, without the need to change batteries.
“GN Hearing is pleased to provide yet another option for hearing aid users, built on our commitment to providing unmatched sound quality and user experience,” said Anders Hedegaard, president & CEO, GN Hearing. “This new rechargeable battery solution allows hearing care professionals to offer an additional option to their clients, and gives hearing aids users even more choices to tailor their hearing experience to their unique preferences,” he added.
Source: GN Hearing
Image: GN Hearing
Hearing aids, Buckinghamshire
For the very latest Digital hearing aids and earwax removal techniques visit Henley hearing Clinic
The Henley Hearing Clinic can proudly boast of being one of the best independent hearing clinics in Bucks. Leon Cox the lead audiologist and owner know a thing or two when it comes to hearing aids and clearing earwax.
Henley hearing clinic News:
Researchers Identify New Type of Vertigo, According to Study Published in ‘Neurology’
With vertigo, people have episodes of dizziness that can last from minutes to days. Vertigo can be caused by serious conditions, such as tumors, or conditions that are fairly benign, such the inner ear disorder Meniere’s disease. But for some people, no cause can be found.
In this new study, neurologists have identified a new type of vertigo where treatment may be effective.
“These conditions can be difficult to diagnose and quite debilitating for people, so it’s exciting to be able to discover this new diagnosis of a condition that may respond to treatment,” said study author Ji-Soo Kim, MD, PhD, of Seoul National University in Seongnam, South Korea.
To diagnose this new condition, the person sits in a dark room and the examiner moves the patient’s head forward and then the head is shaken horizontally for about 15 seconds. Then the patient opens his or her eyes and a video recording is taken of eye movements. The neurologists discovered that after the test, people with this new condition had eye movements called nystagmus that lasted longer than for other people. The new condition is called recurrent spontaneous vertigo with head-shaking nystagmus.
Among 338 people with vertigo with no known cause, 35 had this new condition and were included in the study. The participants had attacks of vertigo ranging from two or three times a week to once a year. They also experienced nausea or vomiting, headaches, and intolerance of head motions during the attacks.
The participants were compared to 35 people with other conditions that can cause vertigo, such Meniere’s disease, vestibular migraine, and vestibular neuritis. The test measured the time constant, or the time that represents the speed with which the reflexive eye movements can respond to change. For those with the new condition, the time constant during the primary phase of the nystagmus was 12 seconds, while it was six seconds for those with Meniere’s disease and five seconds for those with vestibular neuritis and vestibular migraine.
The neurologists also found that people with the new type of vertigo were more likely to have severe motion sickness than those with other types of vertigo.
A total of 20 of the 35 people with the new type of vertigo who had frequent attacks and severe symptoms were given preventive medication. About one-third of those had partial or complete recovery with the new medication. During the long-term follow-up of an average of 12 years after the first symptoms for 31 participants, five reported no more attacks, 14 said their symptoms had improved, and only one said symptoms had gotten worse.
Kim said that people with this condition may have a hyperactive mechanism in their vestibular system that helps the brain respond to movement of the body and in the environment.
“It’s possible that the vertigo occurs when this unstable mechanism is disrupted by factors either within the person’s body or in their environment,” Kim said.
The study was supported by the National Research Foundation of Korea. Learn more about the brain at www.BrainandLife.org, the American Academy of Neurology’s free patient and caregiver magazine and website focused on the intersection of neurologic disease and brain health. Follow Brain & Life on Facebook, Twitter, and Instagram.
The American Academy of Neurology is said to be the world’s largest association of neurologists and neuroscience professionals, with 34,000 members. The AAN is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer’s disease, stroke, migraine, multiple sclerosis, concussion, Parkinson’s disease, and epilepsy.
Original Paper: Lee S-U, Jeong-Yoon C, Hyo-Jung K, Ji-Soo, K. Recurrent spontaneous vertigo with interictal headshaking nystagmus. Neurology. 2018. Available at: http://n.neurology.org/content/early/2018/05/23/WNL.0000000000005689
Source: AAN, Neurology
The best hearing centre in Bucks?
Here at The Henley hearing clinic don’t really go around saying we are the best hearing centre in Bucks all the time, but we do like to think we are one of the best.
We offer the most up to date tech for getting your hearing back to a liveable level that you will really notice. We also offer ear wax removal using the very gentle Microsuction Technique or the traditional water ear irrigation technique. As we are the leading audiology clinic in the area we do have the very latest in hearing tech and digital hearing aids.
Henley hearing clinic. News:
Brainwave Abnormality Could Be Common to Parkinson’s Disease, Tinnitus, Depression
Vanneste and his colleagues—Dr Jae-Jin Song of South Korea’s Seoul National University and Dr Dirk De Ridder of New Zealand’s University of Otago—analyzed electroencephalograph (EEG) and functional brain mapping data from more than 500 people to create what Vanneste believes is the largest experimental evaluation of TCD, which was first proposed in a paper published in 1996.
“We fed all the data into the computer model, which picked up the brain signals that TCD says would predict if someone has a particular disorder,” Vanneste said. “Not only did the program provide the results TCD predicted, we also added a spatial feature to it. Depending on the disease, different areas of the brain become involved.”
“The strength of our paper is that we have a large enough data sample to show that TCD could be an explanation for several neurological diseases.”
Brainwaves are the rapid-fire rhythmic fluctuations of electric voltage between parts of the brain. The defining characteristics of TCD begin with a drop in brainwave frequency—from alpha waves to theta waves when the subject is at rest—in the thalamus, one of two regions of the brain that relays sensory impulses to the cerebral cortex, which then processes those impulses as touch, pain, or temperature.
A key property of alpha waves is to induce thalamic lateral inhibition, which means that specific neurons can quiet the activity of adjacent neurons. Slower theta waves lack this muting effect, leaving neighboring cells able to be more active. This activity level creates the characteristic abnormal rhythm of TCD.
“Because you have less input, the area surrounding these neurons becomes a halo of gamma hyperactivity that projects to the cortex, which is what we pick up in the brain mapping,” Vanneste said.
While the signature alpha reduction to theta is present in each disorder examined in the study—Parkinson’s, pain, tinnitus, and depression—the location of the anomaly indicates which disorder is occurring.
“If it’s in the auditory cortex, it’s going to be tinnitus; if it’s in the somatosensory cortex, it will be pain,” Vanneste explained. “If it’s in the motor cortex, it could be Parkinson’s; if it’s in deeper layers, it could be depression. In each case, the data show the exact same wavelength variation—that’s what these pathologies have in common. You always see the same pattern.”
EEG data from 541 subjects was used. About half were healthy control subjects, while the remainder were patients with tinnitus, chronic pain, Parkinson’s disease, or major depression. The scale and diversity of this study’s data set are what set it apart from prior research efforts.
“Over the past 20 years, there have been pain researchers observing a pattern for pain, or tinnitus researchers doing the same for tinnitus,” Vanneste said. “But no one combined the different disorders to say, ‘What’s the difference between these diseases in terms of brainwaves, and what do they have in common?’ The strength of our paper is that we have a large enough data sample to show that TCD could be an explanation for several neurological diseases.”
With these results in hand, the next step could be a treatment study based on vagus nerve stimulation—a therapy being pioneered by Vanneste and his colleagues at the Texas Biomedical Device Center at UT Dallas. A different follow-up study will examine a new range of psychiatric diseases to see if they could also be tied to TCD.
For now, Vanneste is glad to see this decades-old idea coming into focus.
“More and more people agree that something like thalamocortical dysrhythmia exists,” he said. “From here, we hope to stimulate specific brain areas involved in these diseases at alpha frequencies to normalize the brainwaves again. We have a rationale that we believe will make this type of therapy work.”
Original Paper: Vanneste S, Song J-J, De Ridder D. Thalamocortical dysrhythmia detected by machine learning. Nature Communications. 2018;9(1103)
Source: Nature Communications, University of Texas at Dallas
Image: University of Texas at Dallas
The Best hearing centre in Buckinghamshire
Henley hearing Clinic News:
‘CNN’ Profiles Inventor of HearGlass
Peter Sprague, the 78-year-old inventor of HearGlass—a technology that incorporates amplification into eyeglass frames—is featured in a recent CNN profile.
According to the article, Sprague was frustrated by how standard hearing aids “distorted audio” and has incorporated directional microphones, Bluetooth and WiFi capabilities, and a discreet design into his fourth-generation prototype.
Marshall Chasin, a frequent contributor to Hearing Review, was quoted in the article about the ways hearing aid manufacturers have improved their devices to help provide users with more dynamic sound options.
New Hearing Devices in Development May Expand Range of Human Hearing
Researchers at Case Western Reserve University are developing atomically thin ‘drumheads’ able to receive and transmit signals across a radio frequency range far greater than what we can hear with the human ear, the University announced in a press release.
But the drumhead is tens of trillions times (10 followed by 13 zeros) smaller in volume and 100,000 times thinner than the human eardrum.
It’s been said that the advances will likely contribute to making the next generation of ultralow-power communications and sensory devices smaller and with greater detection and tuning ranges.
“Sensing and communication are key to a connected world,” said Philip Feng, an associate professor of electrical engineering and computer science and corresponding author on a paper about the work published March 30 in the journal Science Advances. “In recent decades, we have been connected with highly miniaturized devices and systems, and we have been pursuing ever-shrinking sizes for those devices.”
The challenge with miniaturization: Also achieving a broader dynamic range of detection, for small signals, such as sound, vibration, and radio waves.
“In the end, we need transducers that can handle signals without losing or compromising information at both the ‘signal ceiling’ (the highest level of an undistorted signal) and the ‘noise floor’ (the lowest detectable level),” Feng said.
While this work was not geared toward specific devices currently on the market, researchers said, it was focused on measurements, limits, and scaling which would be important for essentially all transducers.
Those transducers may be developed over the next decade, but for now, Feng and his team have already demonstrated the capability of their key components—the atomic layer drumheads or resonators—at the smallest scale yet.
The work represents the highest reported dynamic range for vibrating transducers of their type. To date, that range had only been attained by much larger transducers operating at much lower frequencies—like the human eardrum, for example.
“What we’ve done here is to show that some ultimately miniaturized, atomically thin electromechanical drumhead resonators can offer remarkably broad dynamic range, up to ~110dB, at radio frequencies (RF) up to over 120MHz,” Feng said. “These dynamic ranges at RF are comparable to the broad dynamic range of human hearing capability in the audio bands.”
New dynamic standard
Feng said the key to all sensory systems, from naturally occurring sensory functions in animals to sophisticated devices in engineering, is that desired dynamic range.
Dynamic range is the ratio between the signal ceiling over the noise floor and is usually measured in decibels (dB).
Human eardrums normally have dynamic range of about 60 to 100dB in the range of 10Hz to 10kHz, and our hearing quickly decreases outside this frequency range. Other animals, such as the common house cat or beluga whale, can have comparable or even wider dynamic ranges in higher frequency bands.
The vibrating nanoscale drumheads developed by Feng and his team are made of atomic layers of semiconductor crystals (single-, bi-, tri-, and four-layer MoS2 flakes, with thickness of 0.7, 1.4, 2.1, and 2.8 nanometers), with diameters only about 1 micron.
They construct them by exfoliating individual atomic layers from the bulk semiconductor crystal and using a combination of nanofabrication and micromanipulation techniques to suspend the atomic layers over microcavities predefined on a silicon wafer, and then making electrical contacts to the devices.
Further, these atomically thin RF resonators being tested at Case Western Reserve show excellent frequency ‘tunability,’ meaning their tones can be manipulated by stretching the drumhead membranes using electrostatic forces, similar to the sound tuning in much larger musical instruments in an orchestra, Feng said.
The study also reveals that these incredibly small drumheads only need picoWatt (pW, 10^-12 Watt) up to nanoWatt (nW, 10^-9 Watt) level of RF power to sustain their high frequency oscillations.
“Not only having surprisingly large dynamic range with such tiny volume and mass, they are also energy-efficient and very ‘quiet’ devices,” Feng said. “We ‘listen’ to them very carefully and ‘talk’ to them very gently.”
The paper’s co-authors were: Jaesung Lee, a Case Western Reserve post-doctoral research associate; Max Zenghui Wang, a former research associate now at the University of Electronic Science and Technology of China (UESTC), Chengdu, China; Keliang He, a former graduate student in physics, now a senior engineer at Nvidia; Rui Yang, a former graduate student and now a post-doctoral scholar at Stanford University; and Jie Shan, a former physics professor at Case Western Reserve now at Cornell University.
The work has been financially supported by the National Academy of Engineering Grainger Foundation Frontiers of Engineering Award (Grant: FOE 2013-005) and the National Science Foundation CAREER Award (Grant: ECCS-1454570).
Original Paper: Lee J, Wang Z, He K, Yang R, Shan J, Feng PX-L. Electrically tunable single- and few-layer MoS2nanoelectromechanical systems with broad dynamic range. Science Advances. 2018;4(3):eaao6653.
Source: Case Western Reserve University, Science Advances