How Do Hearing Aids Work?

All hearing aids have three basic parts: microphones that pick up the sounds around you, amplifiers that make the sounds louder, and receivers that relay the amplified sounds into your ear. While modern hearing aids may have additional features and parts, their basic function relies on these three parts.

Hearing Aid Features

Hearing aids are digital now, and this means that they can be finely programmed to your specific variety of hearing loss. The hearing aid amplifies the sound in the environment in the amount and manner that it is programmed to.

All hearing aids now have feedback suppression and some amount of background noise reduction, either digitally or through directional microphones. There are, however, some newer features that can vary between hearing aids, and these really impact quality of life. When I am selecting a new set of hearing aids with my patients, I always have a detailed conversation about their lifestyle. While one patient may talk on the phone every day and find direct Bluetooth streaming to be their most important feature, others might have dexterity issues that make changing tiny batteries impossible. In the latter case, it may be essential that batteries are rechargeable.

Some features to consider:

Rechargeable Batteries: Some hearing aids now have lithium-ion rechargeable batteries and even rechargeable cases, similar to AirPods. This can be really handy for frequent travelers and individuals with dexterity issues.

Telecoil: Telecoils allow you to pick up the sound from loop systems, which are commonly installed in churches, theaters, and other large venues. If you frequent locales with loop systems, make sure that the hearing aids you purchase have a telecoil. Although this is a simple, long-standing technology, not all hearing aids include one (usually to save space).

Wireless Connectivity: Most hearing aids now have wireless connectivity that will allow them to connect to a remote control or streamer. Some even have Bluetooth that allows direct connectivity with audio streaming to cell phone phones or tablets. If you are interested in direct audio streaming, it’s a good idea to confirm that your hearing aids will be Bluetooth-compatible with your particular phone model since not all hearing aids are compatible with all cell phones, even if they have Bluetooth.

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