Scientists have for decades debated the source of junk DNA. While acknowledging that not all non-coding DNA was junk, many couldn’t understand how a small portion could serve any useful function – a phenomenon dubbed the C-value paradox.
One solution was provided by David Begun’s group in their paper on fruit fly genome comparison. By comparing different fruit fly species genomes and finding that certain noncoding sequences shared among them, Begun posited that these may represent progenitor genes encoding protein-coding genes.
This theory attracted significant media coverage and may have had an influence on leaders of a large genome-scanning project called ENCODE. This endeavor looked at which parts of human genome were being transcribed or bound to proteins, and claimed that 80% of DNA served some biochemical purpose; creationists celebrated this finding. Yet this conclusion rested upon an inadequate argument; ENCODE didn’t demonstrate any activity was caused by junk DNA activity.
C-value paradox can also be explained by orphan genes. Orphan genes refer to stretches of DNA found within our genome but without known protein-coding functions; like Scrabble tiles that don’t spell out sentences. Over time these orphan stretches might accumulate mutations to give them meaning – for an orphaned stretch to become functional genes requires mutations to allow cells to read it and convert it to RNA; it must also have regulatory components indicating when and where its activity should occur; finally it should feature short codes to indicate when it starts and stops producing product from within cells.
Researchers have recently developed sophisticated tools for analyzing genetic data. As they’ve done so, they have begun looking more closely at orphan genes and discovered evidence suggesting they might mutate into useful ones – yet still no explanation can be offered as to why such genes exist so frequently in the first place.
Junk DNA Wave Genetics
A team of Russian scientists published results in September 2012 showing that living DNA can respond to language-modulated waves (Vibrating behavior of Junk-DNA as the major source of ultra-weak light emission, known as biophotons). They hypothesize that certain frequencies can alter DNA’s vibrational state and, ultimately, its ability to emit biophotons as well as communicate with other cells within its surroundings.
Neurofeedback training helps individuals consciously modulate brainwaves, which over time may result in improved cognitive performance and emotional regulation. To achieve optimal results with neurofeedback training it is vital to follow training recommendations closely.
Mendi Headband uses Hemoencephalography technology to measure oxygenated blood flow and brain activity, offering users a gaming experience which requires them to concentrate. While its interactive nature may not suit every user, the Mendi headband still provides enjoyable gameplay that requires them to concentrate.
EEG Devices
Neurofeedback uses EEG (electroencephalography) technology to measure brain activity. This headset-based technology utilizes sensors to read electrical signals your neurons emit from within your head. The data gathered through EEG measurements are converted to visual displays showing your own individual brainwave patterns and allow you to practice new skills for mental fitness and cognitive wellness. Home EEG devices are completely non-invasive passive technologies which listen and respond without altering or changing any electrical activity of their own.
As EEG devices gain in popularity, more people are turning to them for at-home use. From practicing meditation and mindfulness techniques, tracking cognitive wellness metrics or conducting rigorous academic research – users need assurances that their device delivers clean and reliable data. With the recent shift of EEG technology from clinical settings to consumer devices offering neurofeedback and brain computer interface possibilities. But not all devices offer equal results.
Home EEG devices should provide scientific rigor while remaining user-friendly, which makes the ideal device. To find your ideal EEG device, start by understanding your goals: for personal wellness or neurofeedback you may opt for one with lower channel count and user-friendly software; otherwise if conducting scientific research or creating your own application then an array of channels and spatial resolution is likely necessary.
When selecting a headset, make sure it fits comfortably on your head and can stay put without shifting during long wear sessions. Also keep in mind that electrodes will come into contact with skin so it is essential that its sensor sensitivity be adequate; finally, decide on whether saline, dry gel-based sensors or hybrid ones would best meet your needs.
Consider how long it will take before seeing results from your device. Like working out at the gym, training your brain takes time – most users begin noticing tangible improvements in their focus or relaxation after just a few weeks of regular sessions.
One of the most exciting applications of neurofeedback is stress and anxiety management. According to research, there exists a specific brainwave pattern which alerts us when entering states of stress or anxiety. With an EEG device at home, you can learn to recognize when your brain shifts toward anxious or stressed states – then practice techniques for returning it back toward more tranquil environments – giving yourself tools for real-time management of stress and anxiety, not just at restful moments throughout a hectic day.
Narbis Smart Glasses
Brain training devices that utilise EEG have gained in popularity among both schools and workplaces alike, but many require significant time commitment from users – which may not be feasible for the average consumer. NeuroSky’s MindWave Mobile 2 and Excellent Brain headsets require long hours spent playing games designed to increase focus, while YBrain models deliver users’ brain data via nodes on their scalp to provide electrostimulation therapy (electric pulses applied directly to scalp nodes). Philadelphia-based company Narbis takes a different approach with smart glasses designed to teach wearers to focus at home.
Narbis Glasses feature a neurofeedback algorithm based on operant conditioning principles, in which “good” behavior is rewarded and bad behavior punished. If sensors on a headset detect distraction, lenses darken to discourage it while when focus and relaxation occur the glasses clear up to reward that behavior. Preorder now at $590 at discounted pricing and they should arrive early December for use two or three times every week while working on tasks requiring concentration for 30 minutes each time.
A mobile app allows users to track progress and adjust sensors according to individual needs. According to their manufacturers, regular use will enable individuals to learn how to control their attention and become more productive at work or school – as well as improving relaxation techniques and getting quality restful sleep.
But these claims are based on prior studies and there’s no way of knowing whether these headsets work or not. Furthermore, neuroscientist Bruce O’Connell warns that there may be an tendency for brain-boosting technology to exaggerate its positive results; he points to p-hacking as an example where researchers with financial interests in publishing only positive findings publish them while concealing negative ones.
Neurofeedback technologies have become an increasingly popular trend, as techniques for recording and stimulating the brain move from labs into the garages of DIY inventors. The trend has been driven in part by video games which promise to help players focus and, sometimes, enhance gameplay, while in part by the FDA not mandating that commercial neurofeedback gadgets meet any standards of effectiveness; that leaves consumers to remain wary when faced with claims like those made by Narbis.
NeurOptimal
NeurOptimal is a dynamic neurofeedback device that works with your body’s natural tendencies to promote resilience and emotional regulation, creating a safe and effective brain training technique suitable for any age or gender, even babies! No diagnosis or protocols need be in place; simply train your brain to focus and self-regulate; this leads to improved health in all aspects of life from academics and work, relationships, sleep quality, mood regulation.
BodyMindBrain Method’s advanced and safe brain-training technology empowers your central nervous system to return to greater parasympathetic balance through providing feedback on unconscious patterns that have been running the show. It continuously reads your brain’s electrical activity during music breaks, then reports this back as non-invasive feedback up to 256 times a second so your mind can assess and adjust itself, giving you power over changes at their source.
Individuals often report that NeurOptimal neurofeedback sessions at home help them stay calm and focused during times of extreme stress, including learning and recall. A few sessions can also improve memory function – one powerful way to reduce anxiety, improve sleep quality, increase energy and promote an overall healthier life.
Additionally, therapy has also proven helpful for individuals struggling with ADHD and PTSD by encouraging relaxation and improving attention/self-regulation. Furthermore, studies have also shown it improves quality of sleep as well as enhance performance levels among athletes.
Are You Curious About Neurofeedback at Home? We Have Certified Trainers Available Now To Discuss It Our certified trainers can explain all of the benefits, and help determine whether this device would be a suitable solution for you!
Carlie Byrom, a NeurOptimal Client and Trainer, shares her heartwarming story about how brain training has transformed her life and those of her loved ones!
Watch this video to gain more insight into how brain training has helped others find emotional resiliency and inner stability. Our clients report experiencing an immediate transformation that affects all areas of their life – from increased focus and clarity, improved relationships and reduced anxiety levels – to feeling more resilient when facing life’s daily challenges. If you would like more information on this technique for yourself, schedule a complimentary consultation at our Middleburg Heights, Ohio offices today – we offer both in-person sessions at our office as well as neurofeedback devices so you can train on your own time at home or in our offices!
Traditional Chinese medicine is founded upon the idea that an energy called Qi (pronounced “chee”) flows freely throughout your body and provides nourishment to cells, tissues, organs, and glands. If this flow becomes blocked or imbalanced symptoms may manifest themselves.
Acupuncture needles can help clear away these blockages. Chinese healers also employ a wide array of herbs and techniques such as cupping to address any ailments that arise.
Deficiency
Chinese medicine recognizes that each individual’s energy or Qi (pronounced Chee) flows along pathways called meridians in their bodies, which if blocked or imbalanced may result in illness. Chinese herbs, acupuncture, massage and other practices may be employed to restore equilibrium to these meridians as well as restore one’s own Qi balance; in addition, this ancient health system also acknowledges environmental and lifestyle influences on health outcomes.
Traditional Chinese medicine believes that an individual’s physical, mental and emotional wellbeing depends on a balance of opposing energies called Yin and Yang – cooling energy known as Yin while heating energy known as Yang is necessary for good health in all living things. Achieve this equilibrium is essential to achieve life-long health for everyone living on our planet.
When someone’s Yin energy becomes deficient, symptoms include low appetite, fatigue, difficulty thinking clearly or always feeling cold. People in these circumstances might also have dark circles under their eyes or have pale complexions with light-colored tongues without coating that quickly tire them out; these individuals likely suffer from an insufficient spleen qi supply since the spleen distributes yin energy throughout the body.
Yin deficiency is more prevalent during winter and in environments with extreme stress or heat, or when people work 80 hour weeks and sleep only four hours each night; such an ongoing situation could eventually deplete one’s Jing Qi and lead to infertility issues.
TCM holds that cancer results from a deficiency of Yin Qi that hinders mitochondrial metabolic activities, with research supporting this theory. Studies have also linked cancer cells’ production of energy via glycolysis rather than oxidation to such deficiencies. If someone with cancer is diagnosed, anti-oxidant supplements could support their spleen’s Yin energy while increasing intake of fruits, vegetables and whole grains could prevent deficiency of this energy. Finally, finding ways to lower stress levels and get more rest could also prove invaluable in terms of recovery from illness.
Excess
Zheng Qi, or true power, allows the body to resist pathogenic influences through an abundance of energy that it stores from water, rice consumption, kidney storage and natural inspiration. This energy acts like an anchor between internal balance and external reality – such as resistance from pathogenic factors. This term denotes this energy source.
Xie Qi refers to pathogenic influences that disrupt this equilibrium and attack the body, leading to disease manifestation. As Zheng Qi attempts to defend against Xie Qi’s influence, symptoms will likely be mild and short-lived if Zheng Qi levels remain strong within your system.
If the body’s Zheng Qi is depleted, symptoms will become more intense and last for longer. For example, if someone contracts a cold with fever and has nasal congestion, stiff neck, and full body ache as symptoms – classic symptoms of an Excess condition.
An excess condition may be brought about by anything from a simple cold to cancer or tumors, and an acupuncturist’s focus will be to reduce excess energy, strengthen deficient energy sources and subdue rebellious energy in order to treat this form of illness.
If you are confused as to which kind of energy disorder you have, an acupuncturist can use the Five Element Diagnosis to assess it and treat any energy imbalance with acupuncture, herbs and Qi Gong exercises – particularly if the condition has been present for some time. Healthy diet and lifestyle changes will also play a part in healing the patient; an acupuncturist will assist them in creating a more balanced energy system capable of resisting external pathogenic forces as well as internal stressors to avoid future illness from occurring.
Rebellious
Rebellious Qi, in Chinese medicine, refers to energy that moves in an unhelpful direction and causes symptoms that differ from its source. If you suffer from acid reflux symptoms such as nausea and/or abdominal distension, traditional medical practitioners might blame your liver, while my acupuncture view would point at your stomach’s rebellious Qi as the main issue. I use an ancient formula called Zuo Jin Wan (Stomach and Liver Combination) that redirects this energy in an effective manner that also nourishes your blood while soothing emotions.
Rebellious Qi occurs due to disharmony between your visceral organs and bowels, each pair having an important partnership – with visceral organs holding and moving, respectively – but when this balance breaks down, functional energy counterflows in an unpredictable fashion, leading to heat inflammation and phlegm formation as well as creating heat, inflammation and phlegm formation, along with creating pain symptoms like swollen joints or breasts, anxiety outbursts, emotional outbursts or menopausal symptoms etc.
Rebellious Qi can often be traced back to imbalances in your Luo Vessels – the acupuncture channels connecting internal organs with your exterior body meridian pathways – such as those located along your Luo Vessels. Like an internal nervous system, these Luo Vessels can manifest in symptoms that manifest across organs, their meridian pathways and even skin surfaces.
As an example, when someone comes in complaining of acid reflux, we can quickly see how rebellious qi is disrupting both meridian and external pathways of their Stomach (Luo Vessel). I typically prescribe Ban Xia Hou Po Tang to address rebellious qi by cooling inflammation while strengthening and feeding back qi-energy to their stomachs.
However, when a patient presents with cold feet we know that their rebellious qi is infiltrating the Spleen (Luo Vessel). Heaviness in legs indicates that this rebellious energy from within the Spleen has entered Kidney channel and caused symptoms in that organ such as heavy legs.
Balance
Qi (life energy) flows constantly throughout our bodies to support healthy functions; when it’s out of balance, illness may arise. TCM practitioners seek to correct underlying patterns causing symptoms through acupuncture, Chinese herbs, diet therapy and lifestyle modifications in order to restore equilibrium within the body and restore harmony back into harmony with each person’s physical being.
Tradition Chinese Medicine (TCM) is one of the oldest medical systems on Earth. Its core concept of yin and yang illustrates how life balances out across both our individual lives and that of nature itself.
At its core, Yin and Yang are two interdependent forces that cannot exist without each other. When the balance between them is achieved, health flourishes whereas when imbalances develop between them can result in illness.
Each of the five elements are associated with certain organs of the body and specific emotions. Understanding which type of energy is affected by such emotions is critical in order for TCM practitioners to select appropriate treatments that will effectively address symptom patterns.
If someone suffers from chronic headaches associated with their Bladder Meridian, for instance, their practitioner might recommend Chinese herbs to restore balance between Yin and Yang in that area of the body. The herbal medication could come in liquid, powder or tablet form for easy consumption.
The Chinese character for “qi,” or energy, is composed of characters for rice and steam to convey its vitality and transformational properties. Qi plays an integral part of traditional Chinese medicine (TCM) as well as in its philosophy regarding health, wellness and disease.
Chinese culture holds that one’s qi (pronounced chi) can be affected by environmental factors like air, water, food and light quality; and their emotional state; anxiety and depression can weaken kidney/bladder meridian energy, leading to symptoms like fatigue and frequent headaches; while strengthening heart/lung energy can prevent heart attacks or bronchitis attacks while having strong, balanced energy can promote longevity.
Your vocal chords are the gateways for thoughts and emotions to express themselves through sound vibrations. Our Inner-Voice scan utilizes technology similar to lie detectors to analyze ten second voice clips to identify emotional imbalances and generate MP3 files with personalized harmonic balancing harmonics to support emotional well-being.
What is an AO Scan?
An AO Scan is a holistic health evaluation conducted with non-invasive biofeedback devices to measure electrical responses of the body. Practitioners trained to use such technology may identify imbalances and stressors before they manifest as physical symptoms; depending on their background and expertise they may suggest diet modification, supplementation, or holistic practices as ways of supporting client wellness and well being.
AO Scan utilizes Radionics – an energy medicine technique unique to Radionics – to address underlying sources of imbalance and stressors such as digestive issues, headaches, fatigue, insomnia anxiety depression or autoimmune conditions. By identifying electromagnetic frequencies associated with symptoms that cause discomfort then broadcasting those frequencies back into the body this device works to clear and shield away these frequencies, providing healing and balance within our systems.
AO Scan technology was specifically created to communicate with the body via subtle bio-frequencies and electromagnetic signals, providing feedback about imbalanced energetic patterns within and increasing self-awareness. With its array of tools that offer personalized frequency feedback for wellbeing and healthy lifestyle choices, this unique device offers the promise of balance for energetic patterns within.
An AO Scan session works by scanning and comparing body frequencies against an extensive database of “healthy” frequencies representing ideal health conditions. Additionally, this system can identify imbalances by sending sympathetic vibrations through the body in order to encourage any organ, tissue or gland outside its homeostatic range back into it.
AO Scan sessions may take place either physically or virtually, depending on an individual’s preferences and circumstances. While in-person sessions provide face-to-face interaction and allow people to ask any pertinent questions directly. Virtual sessions offer clients with busy schedules or limited access to local practitioners an ideal solution. Furthermore, many practitioners provide package deals or flexible payment plans in order to make virtual sessions more accessible. As potential clients, it is advised that prospective AO Scan clients carefully research a practitioner’s background and credentials in order to assess their level of experience with this technology. Unfortunately, unlike traditional healthcare, sessions don’t usually fall under insurance coverage.
How does an AO Scan work?
AO Scan Technology (available as an app) employs subtle bio-frequencies and electromagnetic signals to assess an individual’s energetic patterns and communicate with their bodies. By scanning personal frequencies against an ideal database frequency list, this system can identify imbalances that require remedying.
Every organ, tissue and cell in the body has a specific, healthy frequency at which they operate optimally. Over time however, these frequencies may become out of alignment, leading to imbalances which manifest themselves through symptoms. At AO Scan we utilize vibrational medicine techniques to balance and restore these frequencies, returning your body back into its natural state of balance for improved health.
This technology is compatible with most mobile devices, including smartphones and tablets. A practitioner connects the device to an individual using headphones and microphone; its software scans energy in ears, eyes, mouth and olfactory canal to detect factors ranging from stress to digestive health that might impact wellbeing; after which it displays a report identifying areas of imbalance along with potential root causes for them.
This data can then be used to generate personalized frequencies that can be sent wirelessly via earbuds and microphone to mobile devices, in order to reestablish an individual’s optimal health frequency and support wellness goals. These frequencies are designed for broadcast over seven-days.
Emotional well-being is an essential factor of overall health, with most diseases stemming from stress or negative emotions. A 10-second sample of voice recording is then analysed by a program, which compares it against 120,000 known frequencies to detect emotional imbalances and generate a report with three out of balance notes or octaves and one suppressed one that are out of balance, plus unique MP3 harmonics to address these issues in as little as 10 minutes per day.
An AO Scan session typically isn’t covered by health insurance and pricing may depend on factors like practitioner experience and location. Package deals or discounted rates for multiple sessions may also be available – please reach out to your local practitioner for more details.
Why should I get an AO Scan?
AO Scan is both diagnostic and therapeutic, using frequency analysis to detect imbalances in the body before providing harmonic frequencies to correct them. Based on radionics principles, it allows users to uncover energetic causes for chronic fatigue or inflammation-related health conditions like IBS or Lyme disease.
Your practitioner will use a biofeedback device to assess how your body responds to various frequencies, and detect any imbalances in its energy field. They’ll interpret their findings and offer recommendations based on them – such as diet changes, natural remedies or lifestyle practices to promote wellness and avoid future dis-ease.
The AO Scan can not only detect emotional imbalances, but can also assess your organs and systems’ energetic health by scanning their frequencies. Once compared with optimal frequencies from its database, the scan sends harmonics balancing any misalignments with corrective harmonics that restore any misalignments remotely – an invaluable resource for self-care! This process is known as energetic optimization and is done remotely using this powerful self-care tool.
AO Scan practitioners are health and wellness specialists trained to use the AO Scan technology. They can assist in deciphering scan results as well as suggesting appropriate diet and supplement changes that support wellness goals.
Cost of an AO Scan can depend on the experience and services offered by its practitioner, while some offer package deals or discounted rates for multiple sessions. Prior to scheduling one, make sure your needs and desired goals for this session are understood before scheduling it.
Tringali Vibrant Health offers new clients an AO Scan Mobile New Client Consultation which includes four scans (Inner Voice, Vitals, Comprehensive and Body Systems), custom reports, MP3 sound therapy files to address emotions identified during Inner Voice scan and 7-day SEFI frequency broadcast tailored specifically to your wellness goals. It is an excellent way to start using this powerful tool!
What are the benefits of an AO Scan?
The AO Scan is an innovative noninvasive device, unlike traditional medical tests which often entail needles or other invasive measures. Utilizing biofeedback and frequency analysis technology, it offers an accurate report of overall wellness without invasive treatments or side effects. Furthermore, its unique technology can identify possible sources of illness to allow individuals to take proactive steps before these issues become serious.
Aside from identifying body imbalances, the AO Scan also serves to balance energy systems through administering specific frequencies to affected areas. Many patients have reported reduced symptoms and improved wellbeing after including the AO Scan as part of their wellness routine – one individual used it to identify food sensitivities contributing to digestive issues; they then made changes that improved both digestion and their wellbeing overall.
AO Scan also provides an effective means for evaluating emotional well-being. It identifies any imbalanced emotions and provides a detailed report, along with audio files to play at home that contain balancing harmonics for each emotion identified by scan. This allows individuals to address any emotional imbalances found.
The AO Scan can also serve as an educational tool, helping individuals better comprehend the energetic patterns that may contribute to illness. This tool is especially effective for individuals experiencing unexplained health problems or who have been diagnosed with chronic conditions – the AO Scan allows them to identify root causes for symptoms while taking steps toward healing them.
The AO Scan is an invaluable asset for anyone seeking to take control of their own wellness. However, it should be remembered that this tool doesn’t diagnose medical conditions; rather it should only be used alongside other forms of healthcare. To maximize its potential and get maximum value out of an AO Scan test session, work with an experienced practitioner who can interpret its results and provide personalized recommendations based on this test.
Inertial actuators positioned along the boundary of a structural opening can achieve both vibration control and sound attenuation; however, finding their optimal placement requires taking into account how your system responds to noise excitation.
Engineered materials with exceptional broadband energy dissipation performance have long been sought across a range of engineering disciplines, as they often facilitate effective vibroacoustic sound attenuation and trapping of spectrally broadband vibration and wave energy.
Noise Attenuation
Noise pollution is an increasingly serious global challenge with serious societal impacts. Industrial equipment and household devices have compounded this issue through vibration transfer into higher frequency modes that are more perceptible by humans. Therefore, lightweight solutions to dampen vibration and sound energy from spreading are in great demand; specifically locally resonant vibro-acoustic metamaterial panels provide impressive stop band performance, although they often exhibit a notable insulation dip at lower frequencies that limits their applicability.
Researchers have recently developed a novel class of hyperdamping inclusions to address this limitation, by carefully engineering their design parameters, they have achieved remarkable broadband vibration and sound energy trapping properties with negligible volume changes. Finite element model investigations help guide selection of softening/buckling behaviors which result in outstanding metamaterial vibration attenuation performance.
By exploiting hyperdamping behaviour, it is possible to design noise control systems using structural openings in enclosures as key points of activation of Active Structural Acoustic Control (ASAC), an emerging technique which has the power to significantly improve passive noise barriers as well as decrease vibration and noise levels.
As part of systems with structural openings, it is necessary to comprehend how dynamic interactions between openings and inertial actuators impact control performance. To this end, a novel method for estimating acoustic power transmission through openings was proposed and integrated into an analytical model to optimize actuator placement – thus creating Dual-Actuator-Type Active Noise Control (DATANC), outperforming MISO-ANC and SISO-ANC configurations between 100-200Hz frequency range.
In order to further optimize its acoustic performance, the DATANC system incorporates a hyperdamping metamaterial. Acoustic tests prove that this metamaterial absorbs significantly more vibration energy at lower frequencies than resonant metamaterials; experiments showing this are performed show this. Furthermore, its performance remains comparable in terms of wide frequency range performance despite only being slightly larger – only 2% larger on average!
Sound Attenuation
Sound attenuation is an essential aspect of vibration control for large and high-performance structures, helping protect hearing loss by limiting transmission of noise between rooms, floors, walls and other structural elements. Acoustic leakage prevention also benefits from sound attenuation techniques used in such buildings.
Vibroacoustic sound attenuation can be achieved using insulation materials, construction methods and other techniques to strategically reduce noise transmission through structures. As opposed to total soundproofing which blocks all acoustic waves from entering or leaving an environment, sound attenuation focuses on blocking certain frequencies while attenuating others.
One popular approach to sound attenuation uses porous material sandwiched between external structures and perforated lining, with its hole size and perforation pattern being varied to absorb sound at different frequencies – particularly useful when dealing with low frequency sounds that could otherwise cause unwanted resonance within structures.
Vibroacoustic sound attenuators combined with acoustic panels are another effective means of sound attenuation, creating a shallow air pocket between them and the wall, which resonates into resonance effects that can be reduced by filling this pocket with porous materials such as foam. This type of tuning can then be toned down through secondary porous materials to alter its pitch sharpness.
Passive vibroacoustic sound attenuators work by increasing mechanical impedance of flexible structures and coupling to and dissipating acoustic modes in cavities, providing a cost-effective alternative to active vibration absorbers that require cabling, power amplifiers, signal conditioning hardware and central control schemes.
Ideal conditions for installing a vibroacoustic sound attenuator include placing it in structures where large structural vibration modes contribute significantly to noise transmission, such as spacecraft fairing structures. Figure 5 depicts this pressure response between structures with and without vibroacoustic sound attenuators installed.
Energy Attenuation
Attenuation occurs when energy loses intensity as it travels through a medium. This loss occurs as a result of interactions between its source and atoms in the medium, such as absorption and scattering. Beer-Lambert law describes attenuation’s dependence upon length of path energy takes through medium; similar attenuation occurs with seismic waves which become smaller further from earthquake center.
Vibroacoustic devices offer two means to reduce sound attenuation: structural damping and acoustic dissipation. Simply, this device works by vibrating a dielectric elastomer membrane within a rigid duct to generate vibrations that scatter high frequencies while simultaneously absorbing lower ones, providing sound attenuation across a much wider frequency spectrum than tuned vibration absorbers and similar devices.
Noise coming down from roof top equipment into an occupied space from ducts is often an irritation and distraction for building occupants, especially if located above offices or other noise sensitive areas. Compounding this issue are other roof-mounted appliances like condenser fans, compressors or fresh air intake and exhaust systems located nearby that further increase its volume.
Vibro-Acoustics provides noise control curbs designed to mitigate these problems. Their vibration isolators reduce transmission of structure-borne noise into occupied space below, with options of 1″, 2″ or 3″ deflection to meet individual project acoustic attenuation requirements.
Curb designs also take wind and seismic loading requirements into account, which is important when installing equipment in areas prone to high winds, tornadoes, hurricanes or tornadoes. Curbs may be designed according to local wind and seismic criteria set by licensed engineers for approval and installation.
Medical x-rays offer another application of the energy attenuation principle: diagnosing and treating patients without cutting them open. To make the most of this powerful tool, however, it’s crucial that one understands and effectively attenuates interactions that take place between x-ray radiation and bone structures and soft tissues of a patient.
Noise Control
Vibro-acoustic sound attenuators provide noise control systems with superior acoustic performance due to their spatial positioning and excitation of its actuators, relative positioning of these actuators to each other and vibrational modes within structures also impact acoustic coupling between them. As shown in Fig 7a, loudspeaker-based configuration (MATHRM DATANC_(2,3)) exhibits limited control performance within 100-200Hz frequency range due to resonance at around 225Hz due to proximity of loudspeaker to enclosure opening which reduces driving structural modes effectively.
However, inertial actuator-based (mathrm ‘DATANC_(1,3)) configuration displays acceptable MSE performance over this frequency range. Additionally, inertial actuators are better placed to excite structural modes with lower vibration frequencies and cancel noise from these modes more effectively than with traditional solutions.
An additional way to improve acoustic performance is to add mass to the area surrounding structures with dominant vibration modes, shifting their participation by increasing efficiency in energy transfer from these modes to other parts of the structure. This can significantly decrease modal participation by vibration-based noise control systems across all frequency bands – especially those intended to decrease sound radiation at lower frequencies.
Addition of mass near a structural opening can reduce MSE by as much as 10dB when compared with SISO-ANC configuration without lid. While this improvement may seem minor, it underscores the significance of properly positioning actuators within vibro-acoustic noise control systems with transparent lids to achieve maximum noise suppression.
This study shows how adaptive active noise control with optimal actuator positioning and gain settings can dramatically enhance acoustic performance in systems featuring structural openings. This method can also be applied to vibrational control problems, providing a practical balance between performance and computational cost.
