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Ask the Audiologist: Hearing Aid Basics Part Two


Note from Dr. Tammy Flodmand:  Hearing aids change very quickly. That is a good thing for the consumer. Every year there are improvements to battery life, technology, moisture resistance and aesthetics. Many of the problems that existed with hearing aids only a few years ago are no longer an issue. So, throw out all those old ideas about what hearing aids are…read on to learn more about today’s hearing aids.

Hearing Aid Batteries

Q: How long do batteries last? How do I know that I’m buying the correct one? And where do I get them?  – John

A: The battery life depends on what size battery you have. Most hearing aids have either a size 312/brown or a size 10/yellow.  A 312 battery will generally last about 7-10 days. A size 10 battery will last approximately 3-5 days. Batteries do have a shelf life so make sure the expiration date on the back is at least a few YEARS out from the current date.

The FDA requires that all batteries be color coded and numbered the same. So the brand you purchase does not matter as long as you remember either the color or the number. For example, the 312 battery is always color coded brown while the size 10 battery is always color coded yellow. Even though different manufacturers will have different packaging the color coding and number are always the same.

You can always get your batteries from Audicus but if you need them in a pinch you can always get them from a local pharmacy store (Duane Reade, CVS, Walgreens, etc.) or for bargain hunters you can get them at Costco or BJs.

How to Choose a Hearing Aid

Q: There are so many different kinds of hearing aids. How do you pick one? – Kristin

A: First, you should determine what will work best for your hearing loss. The behind-the-ear (BTE) hearing aids work for a wider range of hearing losses while the in-the-ear (ITE) hearing aids can only be fit on mild to moderate hearing loss levels.

Second, you should determine what you prefer physically. Although BTE (like the Canto hearing aid or Dia hearing aid) hearing aids are 80% of the market some people still prefer an ITE hearing aid (like the Uno hearing aid.) If there is no restriction on what you can wear due to the degree of hearing loss then you can choose whichever you prefer based on appearance and comfort.

Hearing Aids and Moisture

Q: I sweat a lot. I mean, a LOT. Can I still wear hearing aids?  – John, Jacksonville, FL

A: You absolutely can. Again, over the past few years the hearing aid technology has changed significantly. Moisture has always been public enemy #1 to hearing aids so that is definitely something that has evolved in hearing aids. Most hearing aids now have some sort of moisture control feature. Some will have a coating on the internal components, others on the outside components and some on both.

For a small number of people this still isn’t enough. For those, we suggest a special dehumidifier to store your hearing aids in at night to help remove the moisture. Also, you can get hearing aid sweat bands which are exactly like what they sound like. . . it’s a small sweat band that covers your hearing aid to absorb moisture before it can get inside and do damage.

If you’d like to submit a question to Dr. Tammy Flodmand please do so at

by Tammy Flodmand

6 responses to “Ask the Audiologist: Hearing Aid Basics Part Two

  1. I sent in my hearing test a while ago. Would you please track it down and tell me which of your hearing aids would be best for me. I need amplification, and at times I cannot understand what people say. I would also like to have the kind of batteries i would need and their price..I want the least visible BTE kind.
    Thank you.

  2. My mother is 85 and hearing is poor . Buying a hearing aid is easy . But very disappointing if not working for her . Can I replace with another ?

  3. I am a Audicus patient and have had my BTE hearing aids for about eight months. After several adjustments I am very pleased with them. I am so adjusted to them I forget they are on my head. I have no skretching, buzzing or problems even in a crowd with loud voices.
    Just wanted you to know how satisfied I have been with my pair.

  4. Do you know if there are powerful analog hearing aids that have blue tooth? I have a 95% hearing loss, severe to high frequency hearing loss. Been deaf since I was 2 yrs old. I have tried 5 different digital hearing aids and they all suck. Sorry to say this but I don’t want to hear the sounds that I have missed out on my whole life. Getting bombarded with new sounds in a noisy world is very nerve wracking. I don’t like the sound dampening feature as it will activate at the worse possible times. I like being in control of my aids when I want to turn things down. I have been carrying on a conversation and the furnace will kick on , which is no problem for me but the dampening feature kicks in and now I can’t hear the person talking. Terrible feature.
    Please do not do away with the analog as we deaf people know more about what we need than having others decide what they want us to hear. Sorry for the venting. Just need to get it out. I want a powerful, analog hearing aid with blue tooth to connect to my cell phone. Anything out there??

  5. Please advise if I can donate my used Siemens hearing aid. It was fitted for my left ear about 5 years ago.

    Thank you,

    1. Hi Juan. Yes! We accept all brands of hearing aids for donation. You can send it to Audicus at 40 Exchange Place, Suite 1820, New York, NY 10005. Thanks for helping the community! – Audicus

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