Hearing Aid Parts Explained: Get to Know Your Device Inside & Out

Medically Reviewed by Dr. Jessica M. Frankel, Au.D., CCC-A, FAAA
Updated October 3, 2025

Every Part Plays a Role in Better Hearing

Hearing aids may look small, but inside each device is powerful technology designed to capture sound, amplify speech, and make listening easier in every environment. 

At Hearwell Services, our licensed audiologists fit premium brands and guide you through every component – with in-home and virtual appointments available across New York and Connecticut.

What Are the Main Parts of a Hearing Aid?

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Modern hearing aids contain several essential parts that work together seamlessly. Here’s what each one does:
1. The Microphone
The microphone captures sound from your surroundings. Many modern models include directional microphones, which focus on the person you’re speaking to and reduce background noise – making conversations clearer, even in busy restaurants or city streets.
2. The Amplifier
The amplifier boosts the sound so you can hear it at the right volume. Our specialists program this feature to your unique hearing test results, ensuring speech is crisp without making everyday sounds uncomfortably loud.
3. The Speaker (Receiver)
The receiver converts electrical signals back into sound and delivers them to your ear canal. This is where clarity happens – and why a properly fitted device is essential for natural sound quality.
4. The Earmold or Dome
The receiver converts electrical signals back into sound and delivers them to your ear canal. This is where clarity happens – and why a properly fitted device is essential for natural sound quality.
5. The Battery
From disposable batteries to advanced rechargeables, this component powers your device. Hearwell offers rechargeable hearing aids compatible with leading brands like Phonak, ReSound, Signia, and Widex, saving you the hassle of frequent battery replacements. 

Simple Definitions

  • Microphone → Captures sound and filters background noise

  • Amplifier → Boosts sound to a comfortable level

  • Receiver → Converts signals into sound for your ear

  • Earmold/Dome → Fits in your ear canal, providing comfort and seal

  • Battery → Powers the entire device, rechargeable or disposable
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Which Hearing Aid Is Right for You?

Your lifestyle, comfort preferences, and hearing goals all play a part in finding the right device.

Answer these quick questions to see which of Hearwell’s hearing aids fits you best.

Quiz
  1. 01/Do conversations in restaurants feel hard to follow?
  2. 02/How much maintenance are you comfortable with?
  3. 03/How important is technology and connectivity to you?
  4. 04/Where do you spend most of your time?
  5. 05/What’s your biggest frustration with hearing aids (or hearing loss)?

🩺 Next Step:

Your answers are just the start. Our licensed audiologists will match you with the right brand, fit, and features – so you can hear clearly and live comfortably, wherever you are.

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What Accessories Can Improve My Hearing Aid?

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Enhance your daily experience with:

  • Bluetooth streamers → Connect directly to TV or music

  • Remote controls → Adjust settings discreetly

  • Replacement domes, filters, and chargers → Keep devices working like new

FAQ

Can I use a smartphone app with my hearing aids?

Yes. Most Bluetooth-enabled devices pair with apps for real-time adjustments and battery checks. Our team will set this up during your fitting and show you how to get the most out of your Bluetooth hearing aids.

Rechargeables are more convenient for most patients, lasting all day on a single charge and charging overnight. Disposables may suit those who prefer quick swaps or travel often. Explore our full rechargeable hearing aid options to see what works best for you.

If your device slips, feels loose, or causes whistling feedback, the fit may be off. Our audiologists can size you for the right dome or custom earmold during an in-home appointment, ensuring both comfort and reliable sound performance.

With proper care, most devices last 5–7 years. Routine checkups at Hearwell keep them in peak condition and extend their lifespan. Schedule a hearing aid checkup to ensure your device is performing exactly as it should.

Often, yes. We work with Medicare, AARP, UnitedHealthcare, and other plans – and we’re 30% less than most providers even without coverage. See how we can help with insurance and payment plans to make care more affordable.

Ready to Hear Well Again?

A hearing aid fitting is the first step to hearing more naturally and confidently. At Hearwell Services, we make it easy – with in-home appointments, virtual consults, and expert care that’s 30% more affordable than most providers.

📍 Amityville, NY | (332) 238-1028

📍 Stamford, CT | (332) 238-1028

📍 Midtown East NYC | (332) 238-1028

📍 Bronx, NY | (332) 238-1028

📍 Hartford, CT | (332) 238-1028

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Dr. Jessica M. Frankel, Au.D., CCC-A, FAAA

Co-Founder | Hearwell Services

With 15+ years of experience, Dr. Frankel specializes in rehabilitation and advanced hearing aid technology. She is a Fellow of the American Academy of Audiology and the Academy of Doctors of Audiology.
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