What’s Inside an MDHearingAid?

woman with pink nails opening up an md hearing aid

Most hearing aids function the same way, but not all devices are equal. They vary significantly in technology, materials, and durability. MDHearing offers affordable medical-grade hearing aids tested in-house by audiologists.

If you’re considering buying your hearing aids from MDHearing, here’s what’s under the hood of these popular devices.

MDHearingAid Parts

MDHearing devices come in three flavors with slight variations in features, but they have the same three essential components found in all hearing aids.

  • Microphone: The built-in microphone captures the external sound and transmits it to the sound processor device. Some MDHearing models include a two-way directional mic for better performance in noisy environments.
  • Sound Processor and Amplifier: MDHearingAids use digital signal processing (DSP) to convert sound waves to digital signals amplified in different frequency ranges based on your hearing test results. The microphone and sound processor are housed behind the ear.
  • Receiver:  The receiver is a speaker positioned at the ear canal’s opening. The amplified sound travels from the sound processor through a tube to the ear.

MDHearingAid Models

MDHearing sells three models of hearing aids assembled in an ISO-certified facility in the United States.

MDHearingAid AIR (formerly MDHearingAid PRO)

person holding a hearing aid

The MDHearingAid Air is MDHearing’s original model and is still the best seller.

Features include:

  • Advanced noise reduction
  • Custom programmed
  • Feedback cancellation
  • Replaceable battery

MDHearingAid VOLT

The VOLT has all the same features as the MDHearingAid AIR plus:

  • Rechargeable batteries
  • Dual-direction microphone
  • Intelligent noise reduction


MDHearing’s top-of-the-line device has all of the VOLT’s capabilities, some intelligent features, and extra bells and whistles.

  • Adaptive technology
  • Smartphone compatible
  • Bluetooth streaming
  • Personalized hearing profiles

If you’re uncertain which one to choose, you can see our MdHearingAid reviews and do an MDHearingAid test to find out which device is better for you.

Batteries and Recharging

Two MDHearing devices have rechargeable batteries, while the basic model uses size-13 replaceable batteries. Here’s what you can expect from each:

  • MDHearingAid Air: Replace batteries every six to 21-26 days, depending on usage. Size-13 batteries retail online for $.30-$.50 per battery.
  • MDHearingAid VOLT: 20 hours of usage on a full charge
  • MDHearingAid VOLT MAX: 15 hours of usage on a full charge

Ear Tips

Ear tips are pieces of silicone that attach to the hearing aid tubing. There are two types: open and closed domes. The open domes have larger holes to provide airflow. They’re generally recommended because open domes are more comfortable and provide clearer, more natural sound. Closed tips have a smaller venting hole.

MD Hearing domes come in two varieties:

  • ComfortTIPs: All current MDHearing devices come with ComfortTIPs, which are elongated and shaped like your ear canal.
  • Circular Domes: MDHearing also sells circular domes that work better with certain types of tubing used in older hearing aids.

For optimal performance, MDHearing recommends replacing these parts every three (3) months.

Hearing Aid Tubing

The plastic tubing has different lengths and shapes. Standard tubing is about 2.16 mm internally and 3.17 mm externally in diameter. Slim tubing is about 1.93 mm inside.

close-up of senior man wearing a hearing aid

All current MDHearingAid models are equipped with thin tubing.

Hearing Aid Cleaning Tools

Regular hearing aid maintenance can improve the longevity of your hearing aids.

MDHearingAids come equipped with a free set of cleaning tools that includes:

  • A wire hearing aid brush for removing blockages from the tubing
  • A brush for removing dust, debris, and  wax from the tips and hearing aid receiver

MDHearing also offers a range of quality hearing aid accessories, including dehumidifiers that can help you avoid damage to your hearing aids from excess condensation. Visit the MDHearing website to search for accessories.

Better Hearing Health

With MDHearingAids, you have easy access to parts and accessories. The hearing aids assembled in an ISO-certified facility are FDA approved. They are readily available, and the MDHearingAid customer logistics center will ensure you have seamless and improved hearing health.

If you’re still unsure whether MDHearingAids are right for you, talk to a hearing expert who can help you better understand your hearing needs and the advantages of various hearing aid options.


1.     https://www.nidcd.nih.gov/health/statistics/quick-statistics-hearing