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You invested in hearing aids because you wanted to hear conversations more clearly, enjoy everyday sounds, and feel more connected to the people around you. But what happens when your hearing aids don’t sound right?

Maybe everyone’s voice sounds muffled, as though they’re speaking through a wall. Perhaps dishes clattering in the kitchen seem painfully loud, but you still struggle to understand conversations. Or maybe your hearing aids worked well initially, but the sound quality has gradually changed.

If your hearing aids don’t sound right, it doesn’t automatically mean you need new ones. The problem could be related to hearing aid programming, an improper fit, changes in your hearing, or something as simple as earwax or a blocked hearing aid component.

One valuable tool audiologists use to investigate hearing aid performance is Real Ear Measurement (REM). This specialized testing method helps determine whether your hearing aids are delivering the appropriate amount of sound amplification for your individual hearing needs.

Let’s explore why hearing aids sometimes don’t sound right, how Real Ear Measurement works, and when professional hearing aid adjustments could make a difference.

Why Don’t My Hearing Aids Sound Right?

Hearing aids are sophisticated devices designed to amplify and process sound according to your specific hearing loss. However, even high-quality hearing aids may not provide the best listening experience if they’re not functioning properly or their settings no longer match your needs.

Here are some common hearing aid sound quality problems and what might be causing them.

1. Your Hearing Aids Sound Muffled

Do voices sound unclear, distant, or as though people are mumbling?

Muffled hearing aid sound can have several causes, including:

• Insufficient high-frequency amplification: Many important speech sounds, including “s,” “f,” and “th,” occur at higher frequencies. If these sounds aren’t adequately amplified, speech may lack clarity.
• Earwax buildup: Excessive earwax can block sound from reaching your eardrum or interfere with hearing aid performance.
• Blocked hearing aid components: Wax guards, microphone openings, or receivers may become obstructed by debris.
• Improper hearing aid fit: An earmold or dome that doesn’t fit correctly can change how sound travels into your ear.
• Changes in hearing: If your hearing loss has progressed, your current hearing aid settings may no longer provide sufficient amplification.

Sometimes, hearing aids make speech loud enough to hear but not clear enough to understand. That’s an important distinction because increasing the overall volume isn’t always the best solution.

2. Your Hearing Aids Are Too Loud or Sound Harsh

Are ordinary household noises suddenly overwhelming? Do paper rustling, dishes clanking, or footsteps sound excessively loud?

Hearing aids that are too loud may be delivering more amplification than you need at certain frequencies or sound levels.

Potential causes include:

• Amplification settings that aren’t appropriately balanced
• Maximum output levels that need adjustment
• Hearing aid compression settings that require fine-tuning
• Changes in your hearing or sound tolerance
• Difficulty adapting to newly amplified environmental sounds

When hearing aids are properly programmed, they should help make soft sounds audible while keeping louder sounds within a comfortable range.

Some adjustment to unfamiliar sounds is normal when you first begin wearing hearing aids. However, persistent discomfort or painfully loud sounds should never be ignored.

3. Speech Is Still Difficult to Understand

One of the most frustrating experiences for hearing aid users is being able to hear someone talking but still struggling to understand what they’re saying.

This problem may be especially noticeable in restaurants, family gatherings, or other noisy environments.

Possible contributing factors include insufficient amplification of important speech frequencies, inappropriate hearing aid settings, background noise, or limitations in how the auditory system processes speech.

Hearing aids can improve access to speech sounds, but they cannot always restore normal speech understanding, particularly when the auditory system has difficulty processing sound.

An audiologist can evaluate whether your devices are providing appropriate amplification and whether additional strategies, programming changes, or assistive listening technology might help.

4. Your Hearing Aids Sound Different Than They Used To

If your hearing aids previously sounded good but now seem distorted, weak, or inconsistent, the problem may not be related to their original fitting.

Over time, hearing aid performance can change because of:

• Moisture or debris inside the device
• Worn or damaged receivers and microphones
• Aging electronic components
• Weak batteries or charging problems
• Changes in your hearing
• Changes to programming or hearing aid settings

In these situations, professional hearing aid maintenance or repair may be necessary before making additional programming adjustments.

What Is Real Ear Measurement and How Can It Help?

Real Ear Measurement (REM) is a hearing aid verification procedure that measures the sound your hearing aids actually deliver inside your ear canal.

Rather than relying exclusively on manufacturer-recommended settings or asking whether the volume sounds comfortable, an audiologist can use REM to objectively evaluate hearing aid amplification.

Here’s why that matters.

Everyone’s ears are different. The size and shape of your ear canal, your hearing loss, and the way your hearing aids fit can all influence the sound reaching your eardrum.

Even two people with similar hearing test results may receive different levels of amplification from identical hearing aids using the same programming settings.

Real Ear Measurement helps account for these individual differences.

How Does Real Ear Measurement Work?

During a Real Ear Measurement appointment, your audiologist typically:

1. Reviews your hearing test results. Your hearing prescription helps establish appropriate amplification targets based on your hearing needs.
2. Places a small probe microphone in your ear canal. A thin, flexible tube is positioned in your ear to measure sound levels near the eardrum.
3. Positions your hearing aid in your ear. Your hearing aid is worn during testing so the audiologist can evaluate its actual performance.
4. Presents calibrated test sounds. These may include speech-like signals at soft, conversational, and louder levels.
5. Compares measured amplification with prescribed targets. Specialized equipment displays how closely the hearing aid’s output matches the desired amplification across different frequencies.
6. Adjusts and rechecks the programming. When appropriate, your audiologist can modify hearing aid settings and repeat measurements to verify the changes.

The procedure is generally quick and noninvasive, although you may notice the sensation of the small probe tube inside your ear.

The result is valuable information about how your hearing aids are performing in your actual ears.

Can Real Ear Measurement Improve Hearing Aid Sound Quality?

Yes, Real Ear Measurement can help identify amplification problems that may be contributing to poor sound quality.

For example, imagine that your hearing aids are programmed to provide additional amplification for high-frequency speech sounds.

The programming software may indicate that the devices are providing the intended amplification. However, Real Ear Measurement might reveal that the sound reaching your eardrum falls below the prescribed targets at certain frequencies.

Your audiologist can use that information to determine whether additional programming adjustments are appropriate.

REM may help identify:

• Under-amplification: Important speech sounds may not be loud enough.
• Over-amplification: Certain sounds may be louder than necessary or comfortable.
• Uneven amplification: Some frequencies may receive appropriate amplification while others do not.
• Programming discrepancies: The actual sound delivered in your ear may differ from what the hearing aid software predicts.

It’s important to understand that Real Ear Measurement doesn’t automatically fix every hearing aid problem.

REM verifies amplification, but it doesn’t directly measure how clearly your brain understands speech or diagnose every possible cause of poor sound quality.

Your audiologist must consider the measurement results alongside your hearing test, comfort, listening difficulties, device condition, and personal preferences.

Why Hearing Aid Programming Matters Even After Your Initial Fitting

Many people assume that once hearing aids have been programmed, they should continue working perfectly without additional adjustments.

In reality, hearing aid fitting is often an ongoing process.

Your hearing needs, listening environments, and personal preferences may change over time. Even if your hearing remains relatively stable, you may discover situations where your current programming isn’t providing the results you want.

For example, you might notice that:

• You hear well during one-on-one conversations but struggle in restaurants.
• The television sounds clear, but certain voices remain difficult to understand.
• Your hearing aids seem comfortable indoors but overwhelming outdoors.
• One hearing aid sounds noticeably different from the other.

Professional hearing aid programming allows your audiologist to fine-tune settings based on these specific concerns.

Depending on your needs, adjustments might involve frequency-specific amplification, compression, noise management, directional microphones, or specialized listening programs.

Real Ear Measurement can help verify the amplification changes, while your feedback helps determine whether those changes improve your everyday listening experience.

What Else Could Be Wrong If Your Hearing Aids Don’t Sound Right?

Although Real Ear Measurement is a valuable verification tool, it is only one part of effective hearing aid troubleshooting.

Before assuming that your hearing aids need reprogramming, your audiologist may investigate several other possibilities.

1. Earwax Buildup

Earwax can accumulate in the ear canal or block hearing aid components, resulting in muffled or reduced sound.

If earwax is affecting your hearing, professional removal may be necessary. Avoid inserting cotton swabs or other objects deep into your ear canal, as doing so can push wax farther inward or cause injury.

2. Hearing Aid Maintenance or Repair Issues

Hearing aids are exposed to moisture, skin oils, earwax, and daily wear.

A damaged receiver, clogged microphone, or malfunctioning internal component can affect sound quality even when the programming is correct.

A professional hearing aid inspection can help determine whether cleaning, replacement parts, or repair services are needed.

3. Changes in Your Hearing

Hearing loss can change gradually, sometimes without you realizing it.

If your hearing aids were programmed based on an older hearing test, they may no longer provide the amplification you need.

An updated hearing evaluation can help determine whether your hearing has changed and whether your hearing aids should be reprogrammed.

Sudden hearing loss, particularly in one ear, requires urgent medical evaluation rather than routine hearing aid troubleshooting.

4. Improper Hearing Aid Fit

The physical fit of your hearing aids also affects sound quality.

A poorly fitting earmold or dome can contribute to feedback, discomfort, changes in sound delivery, or an overly plugged-up sensation.

Your audiologist may recommend adjusting the physical fit, changing the dome, or evaluating a different earmold or venting configuration.

5. Expectations and Listening Environments

Even appropriately programmed hearing aids have limitations.

For example, understanding speech in a crowded restaurant is more challenging than listening in a quiet room because competing voices and background noise make it harder to separate speech from other sounds.

Your audiologist can help determine whether hearing aid adjustments, additional listening programs, communication strategies, or assistive listening devices could improve your experience.

What Should You Do If Your Hearing Aids Don’t Sound Right?

If you’re unhappy with your hearing aid sound quality, there are a few practical steps you can take before your next audiology appointment.

First, check the basics. Make sure your hearing aids are charged or have fresh batteries, inspect accessible wax guards and domes, and follow the manufacturer’s recommended cleaning instructions.

Next, identify when the problem occurs. Does speech sound muffled all the time or only in noisy places? Is one hearing aid louder than the other? Did the problem begin suddenly or develop gradually?

Then, schedule a professional hearing aid evaluation. If basic troubleshooting doesn’t resolve the issue, an audiologist can investigate whether the problem involves your hearing, your hearing aids, or both.

During your appointment, your audiologist may recommend:

• An ear examination to check for wax or other concerns
• Updated hearing testing
• Hearing aid cleaning and performance checks
• Real Ear Measurement to verify amplification
• Hearing aid programming adjustments
• Hearing aid repair or replacement of malfunctioning components

The best solution depends on what’s actually causing the problem.

When Should You Schedule a Hearing Aid Follow-Up Appointment?

You don’t have to wait until your hearing aids stop working completely to schedule a follow-up appointment.

Consider contacting your audiologist if:

• Speech consistently sounds muffled or unclear.
• Your hearing aids are uncomfortable or excessively loud.
• You’re frequently adjusting the volume without getting better clarity.
• Your hearing aids sound different than they did previously.
• You’re having difficulty hearing in situations where you previously managed well.
• Your hearing aids whistle, distort, or produce inconsistent sound.
• You haven’t had your hearing evaluated recently and suspect it may have changed.

Regular follow-up care can help keep your hearing aids functioning appropriately and ensure that their programming continues to support your hearing needs.

Diabetes and Hearing Loss: The Silent Connection

Diabetes is a known cause of hearing loss. In fact, the connection is well documented through numerous studies and the effect is magnified in individuals who do not control their diabetes. Uncontrolled diabetes can cause hearing loss due to the damaging effects of high blood sugar levels on various parts of the auditory system.