Speech in Noise: How Hearing Aid Technology is Evolving
For people with hearing loss, background noise creates some of the most challenging listening situations. The ability to follow conversations in noisy environments often determines how much someone can participate in social activities, affecting their quality of life. Modern hearing aid technology offers new solutions to this persistent problem. A noisy restaurant can make dinner conversation nearly impossible to follow.
At family gatherings, overlapping conversations can become a confusing blur of sound. Even simple activities like grocery shopping can become stressful when background noise interferes with understanding employees or fellow shoppers. This challenge affects millions of people in their daily lives. These situations often lead people to withdraw from social activities they once enjoyed, impacting their relationships and overall well-being.
The good news is that hearing aid technology has made remarkable strides in addressing these challenges. Today's devices use advanced artificial intelligence and sophisticated sound processing to help separate speech from noise in ways that weren't possible just a few years ago. By better understanding how these technologies work, you can make informed decisions about managing your hearing health.
The Challenge of Background Noise
When multiple people are speaking simultaneously or environmental sounds compete with conversation, the brain must work harder to focus on the intended speaker. For those with hearing loss, this task becomes even more demanding. The cognitive load increases as the brain attempts to separate different sound sources and identify important speech cues.
Today's hearing aids use sophisticated systems to help users hear better in noisy environments. These devices analyze incoming sounds and use artificial intelligence to determine which sounds should be amplified and which should be reduced. Recent developments in hearing aid technology have focused on improving how these devices handle background noise. Newer models are better at telling the difference between speech and unwanted sounds, which can help make conversations easier in places with a lot of background noise.
These changes are made possible by updated sound processing systems that lower the volume of certain noises while keeping speech clearer. While the technology behind it is complex, the goal is simple: to make hearing in noisy environments more manageable. Noise reduction in hearing aids is a feature that helps make listening easier in places where there are a lot of background sounds.
Hearing aids have small microphones that pick up all the sounds around you. These sounds are then sent to a tiny computer chip inside the device. The chip works by separating speech from other noises, like traffic, wind or people talking in the background. This technology helps you pay more attention to the person you’re talking to, especially in noisy settings like restaurants or public spaces. It doesn’t remove all background noise, but it makes it less distracting so you can follow conversations more clearly.
Current hearing aids are designed to prioritize speech over noise, a feature that has revolutionized how you can participate in conversations. While the technology behind this is sophisticated, its impact on your daily life is simple - it makes understanding speech in noisy environments easier. Modern hearing aids are designed to help individuals focus on speech, even in noisy places, by using more than one microphone.
These microphones are placed at different points on the device and work together to pick up sounds from various directions. The hearing aid can then detect where the speech is coming from - usually right in front of the listener - and focus on those sounds. At the same time, it lowers the volume of sounds coming from other directions. In addition to using multiple microphones, modern hearing aids also rely on digital noise reduction algorithms.
These algorithms are built into the computer chip inside the hearing aid. They analyze the incoming sounds in real time, identify patterns that are likely to be noise and reduce their volume without affecting speech. For example, the steady hum of an air conditioner can be toned down while keeping voices clear.
Advanced noise reduction in hearing aids has made a noticeable difference in how comfortable listening can be, especially in busy or loud environments. By lowering background noise and highlighting speech, these systems reduce the strain that often comes with trying to follow conversations in places like restaurants, stores or public events. Without having to focus as hard to hear clearly, you often experience less fatigue and frustration throughout the day.
The technology behind advanced noise reduction also helps reduce sudden, sharp sounds. These systems respond quickly, lowering the volume of harsh noises while keeping softer, more important sounds at a steady level.
When selecting a hearing aid, the quality of its noise reduction feature should be a top priority. You want a device that can effectively distinguish between speech and background noise, enabling you to engage in conversations effortlessly, even in loud environments. It’s important to remember that hearing aids can vary in how well they manage background noise. Some are better at reducing steady sounds, while others are designed to respond quickly to sudden noises.
When choosing a hearing aid, think about the types of environments you’re in most often. Don’t hesitate to seek guidance from an audiologist during this process. They are well-versed in different models and their features and can steer you towards the best fit for your needs. To get the most out of your hearing aid’s noise reduction, it’s important to maintain your device and choose the right settings for different situations.
Regularly cleaning your hearing aid helps prevent buildup of earwax and dust, which can interfere with its performance, including the noise reduction feature. Additionally, modern hearing aids often have multiple settings designed for specific environments, like quiet rooms or crowded places. Another way to optimize your hearing aid’s noise reduction is by working closely with your audiologist. They can adjust the settings to match your specific hearing needs, helping you get the most effective noise control.
Many hearing aids also include directional microphones, which focus on sound from a particular direction and reduce noise from other angles. It’s important to remember that it might take some time to adjust to these features, so be patient and give yourself the chance to practice in different environments to see what works best for you. Remember, these are general tips. Improving your hearing health is a personal process understanding how your hearing aid works is vital.
With time, patience and the right support, you can make the most of your device and enhance your quality of life. If you want to learn more about noise reduction or specific hearing aid features, schedule an appointment with an audiologist. Like noise canceling options available in most headphones, hearing aids are also equipped with multiple noise reduction (NR) features with varying signal processing strengths to help listen in noisy environments.
As the name suggests, NR attenuates noise levels, but unfortunately it often affects speech cues that may overlap with background noise, lowering sound quality. Consequently, some hearing aid users may find NR processing favorable as it noticeably reduces noise, while others may find it unfavorable as it leads to a decline in speech quality. The degree of individual variability can become tremendous with the increasing strength of NR processing, where more noise is reduced, but speech quality worsens.
Our research aims to better understand the underlying biological mechanisms of such variability and pave the way for a more personalized and effective hearing aid technology, offering hope for those struggling in noisy listening environments. Before we delve into the details of our experiment, it is essential to note that the concept of signal-to-noise ratio is a fundamental aspect of understanding sound perception. It is the numerical representation of the balance between signal (the sound we want to hear, like speech) and noise (the sound we do not).
For instance, when a sound has a signal-to-noise ratio of 3 decibels (dB), the perception of the sound could be vastly different internally between two individuals, with one perceiving 0 dB and the other perceiving 6 dB. To overcome this, our team has quantified an individual “neural signal-to-noise ratio” using brain measures with electrodes attached to the human scalp. Our data reveals that this brain index can predict the extent of speech perception benefits from NR in each listener. In addition, this correlation becomes more pronounced with the increasing strength of NR processing, underscoring the practicality of this biological measure.
One distinct part of our experiments is that we also included subjective measures of noise tolerance in the test battery to compare an individual’s answers about noise tolerance on questionnaires with what their brain shows during the experiments. Both measures collectively better explain individual variability in NR benefits in speech perception-even though the brain and subjective measures did not correlate and the portion explained by the subjective measure was marginal.
These findings, which appeared in the journal Applied Sciences in August 2024, are significant. Our results suggest that objective measures such as brain measures and people's responses to survey questions may capture different perspectives of their auditory characteristics. We will continue incorporating subjective and biological measures and investigate the underlying biological mechanisms of people's reactions to hearing aid features such as NR.
Many studies in this area are currently being conducted in the Hearing Outcome and Neuroscience Laboratory, part of the department of communication sciences and disorders at Montclair State University in New Jersey. Have you ever found yourself straining to hear conversations, especially in noisy environments? If so, you’re not alone. The struggle to understand speech can be a frustrating part of hearing loss, but the good news is, the right hearing aids can help.
For many people with hearing loss, conversations can be a daily challenge to navigate. Certain words may be harder to hear than others, resulting in gaps in conversations, and specific environments may even make it impossible to discern speech entirely. People with hearing loss often struggle to hear high-pitched sounds. This can make it tough to understand higher-pitched voices and even certain consonants like “s,” “t,” “p,” and “f,” leaving gaps in conversations. The other challenge is background noise.
Modern prescription hearing aids are packed with features designed to address your specific needs. These advanced hearing aids come equipped with powerful processing technology and are programmed to benefit your unique hearing requirements. At the core of all prescription hearing aids lies the Digital Signal Processor (DSP), a powerful chip that analyzes incoming sound waves. This allows for targeted amplification, making voices louder and clearer while minimizing unwanted sounds like background noise.
They can also adjust the frequency response based on your specific hearing loss, ensuring you hear the full range of sounds critical for speech comprehension. Building upon the foundation of clarity DSP technology provides, many hearing aids boast automatic noise reduction capabilities as well. Hearing aids with automatic noise reduction technology combat this using advanced algorithms to differentiate between speech and background noise.
This advanced technology also adjusts noise reduction levels automatically based on your listening environment. Many prescription hearing aids are also equipped with adaptive directional microphones. While less advanced hearing aid microphones (omnidirectional microphones) pick up sounds from all around you, adaptive microphones act like a spotlight for speech. As the name suggests, adaptive directional microphones can also automatically adjust their focus.
If someone speaks from the side, the microphone will shift its attention, ensuring clear speech no matter where the conversation flows. Hearing loss is unique for everyone, and no two people have the same needs. The specific frequencies you struggle with can vary depending on the type and severity of your hearing loss. During your comprehensive hearing evaluation, your specialist will be able to determine the precise sound frequencies you have difficulty hearing.
Thanks to advances in wireless technology, many hearing aids now come with Bluetooth connectivity built in. This feature allows them to connect seamlessly with smartphones, tablets, televisions, and more. This improves the sound’s clarity and eliminates the challenge of competing background noise. Some hearing aids with Bluetooth connectivity can also be controlled remotely using smartphone apps.
Artificial intelligence (AI) is rapidly transforming the world of hearing aids. AI hearing aids use advanced algorithms to analyze the sounds happening around you. This allows them to constantly fine-tune your settings to suit your listening environment and optimize for speech clarity. AI hearings don’t stop there though. These incredible devices can even identify familiar voices, automatically boosting their clarity.
Thanks to modern technology, hearing aids are more powerful than ever. At Audibel, we offer a wide range of advanced hearing aids featuring the latest technologies discussed above.
Notable Hearing Aid Technology
Leading hearing aid manufacturers have developed innovative solutions to help users better understand speech in noisy environments. Each brand approaches this challenge with unique technology, offering different ways to process and clarify sound. These advances represent significant improvements in how hearing aids manage background noise while maintaining speech clarity.
- The Widex Moment hearing aids feature PureSound technology with ZeroDelay processing, which delivers clear, natural sound even in challenging environments. The Moment SmartRIC model's unique L-shaped design enhances the signal-to-noise ratio, making it easier to follow conversations in noise.
- ReSound Vivia incorporates advanced AI-driven noise reduction through its Deep Neural Network processing. Trained on 1.5 million spoken sentences, the hearing aids use Intelligent Focus to adapt to different listening environments, helping users focus on speech while reducing unwanted background sounds.
- The Oticon Intent introduces 4D Sensor technology that considers head movement, body movement, conversation activity, and the acoustic environment. This comprehensive approach helps the hearing aids better understand your listening intentions and adapt accordingly.
- Starkey Edge AI features an advanced G2 Neuro Processor with a fully integrated neural processing unit. Like the brain's auditory cortex, it analyzes complex soundscapes at remarkable speeds to separate speech from background noise with unprecedented accuracy.
Artificial Intelligence Makes the Difference
Modern hearing aids leverage artificial intelligence to distinguish between different types of sounds. For example, the Starkey Edge AI utilizes a fully integrated neural processing unit that maps the listener's environment in real time, processing acoustic information and motion data to deliver clearer speech and reduced noise automatically.
The Oticon Intent's MoreSound Intelligence 3.0, powered by its Deep Neural Network 2.0, provides users with clearer sound separation. This technology helps maintain speech clarity even as background noise levels change.
Real-World Benefits
These technological advances translate into practical benefits for hearing aid users:
- Better speech recognition in group settings
- Reduced listening fatigue
- More natural sound quality
- Easier participation in social activities
- Improved ability to focus on desired speakers
Making Adjustments for Different Environments
Many current hearing aids allow users to make adjustments through smartphone apps. The MyStarkey App enables Edge AI users to fine-tune their hearing aids' settings for different environments. Similarly, ReSound Vivia users can adjust their devices through the Smart 3D app to optimize hearing in various situations.
The Importance of Both Ears
When dealing with background noise, using two hearing aids (bilateral fitting) typically provides better results than using just one. Two hearing aids help your brain better locate sound sources and separate speech from noise, making it easier to follow conversations in challenging environments.
Beyond Technology: Communication Strategies
While advanced hearing aid technology significantly improves speech understanding in noise, combining it with effective communication strategies can enhance results. No matter how sophisticated your hearing aids are, these practical approaches can help you get the most from your devices.
Strategic Positioning
Position yourself where you can see speakers' faces clearly. Visual cues from facial expressions and lip movements provide valuable context. In restaurants, sit with your back to the main noise sources, such as kitchen doors or busy walkways. This helps your hearing aids focus on the voices you want to hear.
Environmental Awareness
Choose quieter areas when possible, especially in restaurants or social gatherings. Look for spots away from background music speakers, ventilation systems, or large groups. Booths often provide better acoustics than open tables, as the high backs can help block some background noise.
Open Communication
Let others know how they can help you hear better. Most people appreciate knowing simple ways to help, such as facing you when speaking or moving to a quieter area for important conversations.
Managing Energy Levels
Take breaks if listening becomes tiring. Hearing in noise requires extra concentration and energy. Short breaks during long social events give your brain time to rest and reset.
The Benefits of Real Ear Measurement
Proper fitting and programming are essential for getting the most from your hearing aids' noise reduction features. At our practice, we use Real Ear Measurement (REM) during every fitting - a best practice method that verifies your hearing aids are providing the right amount of amplification for your specific hearing loss. This process involves placing a tiny microphone in your ear canal while wearing your hearing aids to measure the actual sound levels reaching your eardrum.
By using REM, we can fine-tune your devices to ensure they're delivering the correct amount of amplification across all frequencies, maximizing their effectiveness in noisy environments. This verification step helps optimize your hearing aids' advanced features and provides you with the best possible hearing experience.
Table: Key Hearing Aid Technologies for Speech in Noise
| Technology | Manufacturer | Description |
|---|---|---|
| PureSound with ZeroDelay | Widex Moment | Delivers clear, natural sound in challenging environments. |
| Deep Neural Network processing | ReSound Vivia | AI-driven noise reduction adapting to different listening environments. |
| 4D Sensor technology | Oticon Intent | Considers head movement, body movement, conversation activity, and acoustic environment. |
| G2 Neuro Processor | Starkey Edge AI | Analyzes complex soundscapes to separate speech from background noise. |