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Summer Science Project Idea: How to Make a Battery

by rayovac28, June 2016

 Make a battery at home

Summer break is an excellent time to invigorate your science-loving family with some easy, at-home science projects for kids. And what’s cooler than building your own battery with common household materials?

Making a homemade battery is a fun, simple science experiment that teaches us about how a battery charges and discharges an electrical current. Like an alkaline battery that powers your flashlights or remote controls, this homemade battery needs three main things to convert chemical energy into electricity: a positive cathode, a negative anode and electrolytes to move ions between the two channels. Those moving ions generate an electrical charge.

Required materials to make a fruit battery:

  • One medium to large tomato (green tomatoes work best)
  • Kitchen knife and cutting board
  • Two four-inch lengths of copper wire
  • Two large metal paperclips (textured or non-shiny version)
  • Two beakers or short drinking glasses
  • Alligator clip leads
  • Headphones


Okay, have everything ready? Let’s get started.  

First you’re going to cut the tomato in small slices, and then place half of the chopped tomato (including the seeds and juice) in each beaker or short drinking glass. Next you want to smash the tomato pieces with a spoon until you have a pulpy, goopy mixture.

Once your acidic tomato base is ready, insert the copper wires and metal paper clips into each end of the both beakers. Double check that the two metals don’t touch, otherwise the experiment won’t work properly. These glasses of tomato pulp function just like a battery cell because it has the cathode (the copper), an anode (the paperclip) and an acidic ion base (the tomato slurry).

Now take the alligator clips and clip one wire lead to the zinc electrode (the paperclip) and another to the copper electrode (the copper wire) in both beakers. This draws the ions between the paperclip and the copper, which creates an electrical current.

After that’s all set up, put on the or just hold them near your ears. Then touch the loose ends of the alligator clips to the metal end of the headphone jack. Within a few seconds you should be able to hear a static crackle as electricity flows from the tomato pulp into the headphones, which then make the current audible.  

How Does a Tomato Make Electricity?

The electricity you’re hearing is generated by a chemical reaction flowing between the acidic tomato pulp and the zinc paperclip. The zinc reacts with negatively-charged ions in the tomato acid, and then these negative electrons are pulled toward the positive-charged copper wire. The flow repeats itself until the electrons are used up and your new tomato battery loses its power.

 This science experiment can also be performed with a potato or lemon, if you'd like a less messy option.  

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Be Prepared for Summer Weather Disasters

by rayovac19, June 2016

Weather disaster preparedness


Summer is officially in full swing across the United States, and for many states the warmer temperatures also signal the start to storm season. Floods, hurricanes, tornados, drought-enhanced wildfires and extreme heat are among the most common weather phenomena that people will encounter during the summer months. It’s important that your family and home are prepared for encountering these incidents, and we have several tips to help keep you safer if such events take place.

Disaster Safety Kits

If you live in an area that’s prone to destructive weather forces like floods or tornados, then it’s important to have a prepared grab-and-go safety bag that has at least three days’ worth of essentials. Rayovac recently partnered with Geek Dad to showcase the best items for a storm safety kit, which includes: personal medications, weather-resistant clothing, flashlights,  batteries, a first aid kit, portable cell phone charger and a battery or solar powered radio to listen for weather updates.

Know Where to Go

Being prepared is the best way to keep everyone as safe as possible in the event of a dangerous weather situation. And one of the most important aspects of being prepared is having an actionable plan in place. When possible, practice your plans with your children to help them feel confident and calm in case of an emergency. Before the storms are estimated to arrive, sit down with your family and figure out the following:

  • When extreme weather is expected, how will you each get emergency alerts and warnings?
  • How will your family get to safe locations for these emergencies, and where are they located?
  • How can your family get in touch if cell phones don’t work, an internet connection isn’t available, or landline phones are down?
  • How will your family get to a meeting place after the emergency, and where is that area located?

Avoid Dangerous Area

Extreme weather scenarios like floods often create unseen dangers lurking beneath the water. Driving through a flooded area is among the worst safety decisions you can make. Raging water can cause irreparable harm before you even realize that you’re in trouble. The National Weather Service’s flood safety campaign offers the best advice: “Turn Around, Don’t Drown.”

This is simple, foolproof advice that can save you and your family, and it’s crucial that we all heed it because:

  • Water is deeper than it looks
  • A small amount of water eliminates tire traction
  • Driving into a flooded passageway can stall or destroy a car engine
  • Six inches of fast moving water can cause a car to float downstream




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The Beginner's Guide to Your Child’s Hearing Loss

by rayovac2, June 2016

Child with hearing loss plays in a lake

Sarah, a 7-year-old girl with braided, shoulder-length brown hair sits in the back of her second grade classroom. Her teacher is lecturing on homophones. Taped on the whiteboard are pictures of watermelons that range from big to small. Sarah slightly tilts her head to focus on her teacher’s spelling lesson, but it’s no use; a few moments later her face glasses over in a bored haze and she begins scribbling in her notebook. The teacher, seeing that Sarah isn’t paying attention, calls on her to answer which use of “than” or “then” is correct. Sarah doesn’t respond until a classmate nudges her, but by then it’s too late—the teacher puts Sarah in timeout for being insubordinate.

 Later in the afternoon the teacher questions Sarah about the incident and learns that Sarah couldn’t hear the lecture. A quick audiology test at the nurse’s office shows Sarah has unilateral hearing loss.

Sarah is imaginary, but nearly 15 percent of real boys and girls between the ages of 6 and 19 have measurable hearing loss in at least one ear. And more than 48 million Americans have significant hearing loss, making it among the most prevalent medical conditions in the United States.

We live in a hearing world. Whether you’re tuning in to a bird’s beautiful melodic chirp, or tuning out a teacher’s English lesson, our ability to hear empowers us to interact with our environment. Sound also affects our cognitive and physical development.

This entire scenario can be overwhelming and scary if you’re a parent whose child has recently been excluded from the important sensory experience hearing offers. And that swimming feeling of ‘what now’ is okay. As a parent, there are a lot of steps you can take if you suspect your child is struggling to hear, or if they’ve recently been diagnosed with hearing loss.

So let’s dive in into The Beginner’s Guide to Your Child’s Hearing Loss.  

Types of Hearing Loss

Your child’s audiologist can best tell you what type of hearing issue your kid has, the likely causes and if the loss is mild or profound. But here are the basics. 

Hearing loss happens in three places:

  1. The outer ear, which is composed of the external ear, the ear canal and the ear drum.
  2.  The middle ear, with the ear drum and three small ossicles bones.
  3.  The inner ear, which houses the snail-shaped cochlea, semicircular canals that help with balance and nerves that are attached to the brain.  

There are four ways people experience hearing loss within these three sections:

  1. Conductive Hearing Loss: This happens when something stops sounds from getting through the outer or middle ear, such as a physical deformity, wax, an ear infection, excess fluid or allergies. Conductive hearing loss can often be treated with medicine or surgery, and sometimes less-serious problems like allergies or the flu can resolve themselves. 
  2. Sensorineural Hearing Loss: A sensorineural loss occurs when the inner ear or hearing nerve isn’t working properly. This can result from exposure to loud noise, trauma, an infection, autoimmune disease, familial hearing loss, or even aging. Sometimes hearing aids or surgery can help restore partial hearing, but depending on the causes it’s possible that the person’s hearing is permanently lost.
  3. Mixed Hearing Loss: Somebody has mixed hearing loss if they have lost hearing from conductive and sensorineural sources. Depending on the root causes, the mixed hearing might be treatable with medications, hearing aids, or a cochlear implant.
  4.  Auditory Neuropathy Spectrum Disorder: This type of hearing loss is when sound enters the ear normally, but the brain can’t understand the sound itself. People with ANSD also struggle with speech perception alongside their hearing loss. ANSD is a relatively recent diagnosis, and the causes and treatment options are still being researched.


Hearing Tests and Diagnosis

Newborns traditionally receive hearing tests before leaving the hospital, and all babies should have a hearing test no later than 1-month-old, the Centers for Disease Control and Prevention recommends. Any child that doesn’t pass the initial hearing test should get a full hearing diagnostic before becoming 3-months-old.

Afterward, your child will probably have their hearing tested again at about 2-years-old, between ages 4 and 5, and then several times throughout their grade school career.

The most common test is painless and uses an audiometer where your child raises their hand upon hearing a specific sound.

Hearing Loss Symptoms

Figuring out if your child has hearing loss ranges from easy to very difficult, and a lot of it depends on your parenting style, your school district and who your kid is.

Outside of audiology exams at school or a family physician, you’ll typically discover your child has a hearing issue when their behavior changes, says Dr. Eve Leinonen, a clinical audiologist and the owner of Affordable Hearing Solutions in Naperville, Ill.

“Maybe in the past their child did really well in school … and now they're struggling to do their homework or pay attention to some things,” she says. “Usually one of the first things that I recommend is to have their hearing checked.”

Other potential hearing-related behavioral issues you might notice include:

  • Difficulty understanding what people are saying
  • Speaking at a different level or tone than their peers
  • Consistently not replying when you call their name
  • Responding to a different question than what you asked
  • Listens to music or the TV louder than what’s normal or healthy
  • Recent academic problems, especially after being moved  to a different spot in the classroom
  • Exhibits a noticeable articulation delay when responding to a question
  • Complains about ear pain or inconsistent noise levels
  • They switch ears frequently while talking on the phone
  • They say “huh?” or “what?” when they’re obviously paying attention


Dr. Leinonen says that issues like these can be caused by simple blockages like fluid in the ears or wax buildup, but they can also be indicative of more alarming hearing problems. She recommends that parents who notice these behaviors commonly occurring talk to their child and ask if they can hear O.K. If any red flags rise, then take your kid to an audiologist or an ear, nose and throat specialist.

Teaching Children about Hearing Loss

Hearing loss can be a scary thing for kids and adults alike. And Dr. Leinonen says how old a child is often determines how they’ll react to the diagnoses and ensuing life changes. The most common questions between children and their parents are why they have hearing loss and what caused it. Answering those questions can be tricky, but audiologists like Dr. Leinonen use anatomic models and pictures to describe all the different parts of the ear, and show where things might not be working properly.

Once children grow up to pre-teen and teenagers, they become more nervous and surprised about their hearing loss and tend to ask more questions—especially if the loss isn’t the cause of trauma, Dr. Leinonen says. But overall, most kids seem to go with the flow.

Hearing Loss and School

Depending on the type of hearing loss your child is facing, their audiologist might contact your kid’s school to figure out what resources the school has at hand. If it is hearing loss that needs amplification, you’ll want to get these resources in place before being able to hear and follow subjects in school becomes an issue for your child, Dr. Leinonen says.

A lot of school districts also have a district audiologist and speech pathologist. This isn’t necessarily somebody involved with special education, but rather somebody who is in charge of making sure that your child has everything they need to succeed in the classroom.

The Individuals with Disabilities Education Act  mandates that all public school districts and schools must have access to a hearing assistive technology system, like an FM device or other amplification system. In the case of amplification, the FM device synchs with your child’s hearing aid to ensure that they hear the teacher at a consistent level, regardless of where they’re seated in the classroom.

If amplification isn’t needed, your audiologist will make sure your child sits in the front of the room so they can hear everything that's going on. Plus some districts come up with an individualized plan depending on the type of hearing loss, and what specific services your child needs.  

Hearing Aids

The key to getting children to accept their hearing aids is to make the process exciting, fun and educational, Dr. Leinonen says. “We don't want the child to feel like there is something wrong with them; instead they should feel like they have something really cool to show everybody else.”

And showing off their hearing devices is a skill kids excel at.

Some manufacturers with a pediatric product line have the devices in fun, vibrant colors. If the kids need an ear mold, then an audiologist can swirl different colors into the mold and add glitter or other sparkly materials. And most of Dr. Leinonen’s pediatric patients are exuberant about designing a colorful device that’s completely unique to them and their personality.

“What I love about the kids is that they don't really care about hiding [the hearing aid,]” Dr. Leinonen says. “Whereas a lot of adults want the aids to be discrete; they don't want anybody to know.”

As for the devices themselves, Dr. Leinonen recommends parents look at hearing aids manufactured by brands with dedicated pediatric options that meet your child’s needs. Several manufacturers also have pediatric kits, which include educational materials for kids and parents alike. A few brands even throw in troubleshooting tools for parents, which often include a battery tester, cleaning brushes, an air puffer, drying capsules and a listening tube.

Kid’s hearing aids function essentially the same as an adult’s aid. But there are a few added safety measures like tamper-proof battery doors and a water-resistant treatment. Some models also have LED indicators to notify parents if the hearing aid battery is low or if a volume control has been hit.

Dr. Leinonen recommends that children always get a molded over-the-ear hearing aid, rather than a customized option that adult’s often opt-in for. That’s because your kid’s ears continue growing and changing, and within six months to a year the custom aid might not fit any longer.

Education Prevents Bullying

Children have a tendency to be cruel to each other; whether they’re intending to or not. And because your child has a hearing problem, and possibly a visible hearing device, they can become targets for bullies or uncouth questions. It’s a hard situation for some kids, parents and teachers alike to handle. But Dr. Leinonen says she finds if her patients go into social settings excited and educated, then they typically don’t have any problems.

But kids tend to get nervous about that first encounter, and it can stymy their enthusiasm.

“I have one little girl in particular who was really, really excited — at first. The device going to be her own thing; and I found that it was a really great way to approach it, especially for a 7-year-old,” Dr. Leinonen says. “But as we got closer to it, and when she came in for a fitting, her mom outright told me that her daughter is really nervous because she's afraid that kids are going to think that she's different or she's weird.”

The solution Dr. Leinonen employs, and recommends for parents as well, is to get exited alongside your child about their device. Make it something fun to show their friends, and teach them how to teach their peers about the hearing aid.

“So I told her that it really comes down to that if kids give you a hard time, or if children are making fun, it's just because they don't understand it,” she says. “So take it out; show them how cool it is. Show them all the really neat things you can do with it, and how it lets you hear them better.”

Communication, education and intrapersonal empathy are methods of preventing or stopping bullying. And if your child has a hearing issue, then all three aspects are crucial. Dr. Leinonen recommends that you prepare your child enough to understand the types of questions or comments their friends or classmates will have, and how to answer them with a fun, respectful attitude. She says once all the kids know what’s going on, the questions and bullying seems to disappear and your kid’s friends will think the hearing aid devices are cool.

So as long as your keep the situation very light and fun, the kids are going to be more accepting of it — especially as they get older.

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6 ways hearing aid technology has improved

by rayovac2, June 2016

Hearing aids have greatly improved in the last 30 years


Hearing aid technology has dramatically improved throughout the last 30 years. The devices have become smaller, more powerful and more technologically advanced. Today a hearing aid can restore multiple types of hearing loss for people of all ages, and perform many feats that engineers only dreamed of achieving in the 1970’s and 1980’s. By all accounts, early hearing aids are primitive when compared to today’s devices. To learn more about how hearing aids have evolved we chatted with Denis Carpenter, who has worked with Rayovac for 37 years and is now the director of technology and OEM liaison.


Analog Aids Turn Digital

When Denis began working on hearing aid technology, hearing aids were designed as analog devices. An analog device has the technical capability to perform one main purpose, which for older hearing aids is to take in sound and made it louder. The major downside of this raw amplification method is that the user gets flooded with extraneous background noise which drowns out what the person is trying to hear.

But in the last two decades, Denis says he has seen digital hearing aids transform the entire industry.  A digital aid receives a sound wave and then an onboard computer processes that sound into bits, which is a digital format that the device can manipulate to achieve certain results. It’s essentially computerizing sound. There are some analog ways to do accomplish this, but they are very limited in scope and effectiveness.

Manipulating Sound

Denis says the biggest game changer during his tenure is the capability for digital hearing aids to change any incoming sound. Because of this, what signals go in the devices aren't necessarily what gets transmitted to the ear.

Let’s say a woman is hearing impaired and a sound wave enters her ear. The sound is quiet and it needs to be made louder so she can hear it. Analog devices could do this, but the aids were indiscriminate toward loud sounds, too, which mean that it’s extra painful to encounter loud sounds. It’s the equivalent of somebody whispering or shouting through a megaphone. The tool amplifies the sound at the same intensity, but one is much more painful to hear than the other.

To counter this, engineers began eliminating excess background noise and figuring out how to make important sounds forefront. As the devices became more digital they can do more things, and that advancement goes right in line with chip technology. When they first started including computer chips, the technology could only perform so many processes per minute. Consequently, the original digital aids were quite crude. But every year the technology improved, and the tools got more sophisticated because they performed more processes per minute.

Improving the processing power within the aids was a crucial task because, unlike other sound-oriented devices, hearing aids must provide immediate feedback. Otherwise, the aid won’t help people keep up with a conversation.

Directional Microphones

This need for accurate, instantaneous feedback, coupled with faster and more powerful processors, meant that engineers began experimenting with how the hearing aid reacted to receiving sound from different angles, Denis says.  The result of these tests is directional microphones.

 So let's say you’re talking in a dinner conversation and you want to hear what somebody has to say. Because of background noise, even people with normal hearing can struggle with this. To counteract the ambient feedback, engineers placed directional microphones into the hearing aids. These are microphones that point toward the object you want to hear, and then 90 degrees away from the object you want to hear. Using input from the various angles, the microphones allow aids to amplify where you're pointing, and cancel out stuff on the side.

Denis says as engineers made more headway with directional microphones, they began developing devices that could isolate, amplify and dampen sounds from any direction. Originally the devices could only adequately handle sounds in front of your head, and you had to point your head toward the person you wanted to talk to. But if someone on the side says something to you, then you'd miss that.

 Nowadays the device is able to change the focus of what you're able to hear by itself, and do it nearly instantly.

Wireless Connectivity

Directional microphones altered how people hear, but the biggest hearing aid innovation in the last five years is wireless connectivity. And it’s changed the lifestyle for hearing aid users.

The wireless connectivity that’s becoming more common allows hearing aids to connect to smartphones, cars and other electronics via a 2.4 gigahertz spectrum. This lets people essentially stream phone conversations, music or the TV directly to their aid.

The other method is called near field connectivity. And the near field method is based around magnetic induction. What happens is an intermediary device, which is a meter or half-a-meter away from your ear, communicates between the hearing aid and the device it’s streaming from.

More Powerful Hearing Aid Batteries

Although Rayovac isn’t an expert on hearing aid devices, Denis and his team work closely with device manufacturers to develop hearing aid batteries that meet the required power consumption of these new innovations. 

The fully wireless 2.4 GHz system added several superb lifestyle features for hearing aid users, but those features also doubled the device’s electrical current draw. When a normal hearing aid is functioning it may run at about two milliamps. When it's running in the streaming mode with a 2.4 GHz system, the power draw goes up to about four to five mA with the additive that that power draw is consistent.

In the past you'd get short duration pulses of that power requirement, but now it's a sustained requirement. Denis says Rayovac engineers had to design a new zinc air hearing aid battery that is more powerful and more efficient under those conditions. This task came about when the company was shifting to a zero mercury battery as well, which made it quite a challenge. The zero mercury products originally had less power than mercury-containing batteries.

The Rayovac team solved the power issue, but the battery lifespan has fallen. Denis says that the batteries don't last as long in new digital devices as they did in analog devices.

When Denis talked with engineers 15 years ago, the size 10 battery, which is Rayovac’s smallest hearing aid battery, was being developed in coordination with Starkey to fit for an ear canal hearing aid. At the time that battery could deliver 59 mA hours. Denis says his engineers wanted the per-battery lifespan to last seven days. Today a size 10 battery delivers twice as much energy, but when you talk with engineers they want it to last three days.

Although Rayovac has doubled the energy that battery can deliver, he problem is that the batteries don't last like they used to. And that's not because the battery is poor. The root cause is that the hearing aid technology is more advanced and requires a lot more consistent power. As manufacturers add more features, the devices require more power. Once you design a battery with more power, the device engineers add more features. So it’s a lifecycle.

The Future of Batteries

The current top-of-the-line option for hearing aid batteries is the zinc air system, which is a very high energy density platform, Denis says. There are not many other systems that have more energy per size.

If you think about a watch battery, the anode and the cathode are both inside the battery itself. The zinc in the cell determines how much energy the battery can deliver. By taking the cathode and putting it on the outside of the battery, engineers can then take more zinc and put it on the inside. This method lets the zinc air system last two to three times longer than a button cell battery.

Rechargeable batteries are supposedly the next big milestone for hearing aid technology. Denis says one of the challenges engineers are facing with rechargeable batteries is making the battery small enough while still giving it enough energy to make it last a day. He says there is product that is market viable, but it’s still right on the edge, and the dilemma around size continues to be prevalent. Denis says the battery needs to be a little bit bigger than engineers really want it to be. Right now the 312 size is the number one battery being made because it's a shorter battery and manufacturers can make a thinner hearing aid with it. So designers really want to have a rechargeable battery as a 312 size. He says that rechargeable products will work pretty easily with a 13 size, but it gets very tenuous around a 312 size. Denis says he’s confident the product will come to fruition, but it still might be a while before the technology is perfected.


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Infographic: How Can You Prevent Hearing Loss?

by rayovac29, May 2016

Loud noise is the most common cause of hearing loss. More than 10 million people in the United States have permanent hearing loss from noises, and more than 30 million people are exposed to harmful noise levels every day. Teenagers are an especially prevalent demographic for people engaging in behaviors that cause hearing loss. Roughly 5.2 million children and adolescents aged 6–19 years old have suffered permanent damage to their hearing from excessive exposure to noise, according to the Centers for Disease Control and Prevention.

You might be surprised to learn how little time it takes for loud noise to temporarily or permanently damage your hearing. We partnered with Starkey to show just how easy it is to harm your hearing, and how you can prevent being in those situations.

 hearing loss from noise happens fast; here is how you can prevent it


If you’re concerned about being affected by loud noises, the CDC recommends that you pay attention to the following hearing damage symptoms:

  • You hear ringing or buzzing (tinnitus) in your ears after exposure to noise.
  • You notice that you can hear people talking, but you have difficulty understanding them, after exposure to noise.
  • You experience "fullness" in your ears after leaving a noisy area.

If you’re consistently experiencing these ailments, consult an audiologist for a hearing check. Otherwise, if you’d like to learn more about your hearing health, hearing aids or hearing aid batteries, visit Rayovac’s hearing resource center.

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What Should You Know About Hearing Tests?

by rayovac15, May 2016

A hearing test can let you know if you need hearing aids

Hearing loss is among the most common medical conditions in the United States. More than 48 million of us have significant hearing troubles in one form or another. Those struggles can affect anyone — young and old alike — regardless if the loss is caused from genetics, trauma, illness, the environment or old age. If you’re concerned that you or your loved ones might have hearing loss, then it’s important to get tested by a hearing professional. A hearing professional will determine if you have hearing loss through a hearing screening, and what kind of loss you’re experiencing with a hearing evaluation. This is done by measuring your ability to hear sounds that reach the brain through the ear canal. Our bodies decipher sound by tuning into vibrational frequencies that happen in air, liquid or solid materials. These vibrations create sound waves, which have certain frequencies and amplitudes based on the speed and height of the vibrations. If a sound wave is vibrating fast, then it has a high pitch. And the height size of the sound wave dictates how loud that sound manifests. Most hearing tests use an audiometer to create specific sound waves at particular vibrations to see if and what you’re able to hear.

Online Hearing Tests

Waiting to treat hearing loss can lead to other issues.  Adults might not be able to safely operate a car or heavy machinery, hear people at work, or meaningfully converse with loved ones. Failing to treat hearing loss in children can hamper their social skills, set them back in school, and harm their cognitive and physical development. Diagnosing hearing loss is a painless experience, and it doesn’t take much time. Plus there are various online hearing tests that offer questionnaires to evaluate if visiting a hearing professional is recommended. Individuals that are interested in an easy in-home hearing screening can try those offered by the Better Hearing Institute and Healthy Hearing. Both organizations offer options that are fast, easy and offer good insight for you and your hearing professional — should you book an appointment.

Hearing Screening vs. Hearing Evaluation

If you do make the appointment then there are two different test categories your hearing professional will likely perform. The first is a hearing screening, which is a quick, cost-effective preliminary exam that checks your hearing to determine if further testing is necessary. If your screening results show that you need further testing then you move on to the second category: a hearing evaluation. This is an in-depth assessment of your hearing to investigate what type of hearing loss you have, how severe it is and what the best treatment options are.

Hearing Loss Treatment

Once your hearing professional determines what type of hearing loss you have, the next step is figuring out what treatment options are available. If your hearing loss is conductive, which happens when something stops sound from reaching your inner ear, then you often have three options: medicine, surgery or hearing aids. If you’ve been diagnosed with sensorineural hearing loss, which is when the hearing nerve isn’t working as intended, then you’re likely looking at hearing aids or surgery. And if your audiologist says you have mixed hearing loss then your best options are medications, hearing aids or a cochlear implant. Hearing aids are among the most common solutions. The devices are highly customizable to fit whatever your needs are, and you’re able to make them as visible or invisible as you’d like. Your hearing professional will be able to recommend particular brands or features, and consult on hearing aid care.  For all you need to know about hearing aid batteries, be sure to visit our hearing aid resource center.

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