Hearing Aids & Assistive Listening Devices

Hearing Aids | ENT Doctor | Chestnut Hill MA

Hearing Aids

Hearing aids are a common non-invasive treatment option for hearing loss. A hearing aid is a small electronic device worn in or behind the ear to amplify sounds. While hearing aids are useful in improving listening and communication, they do not cure hearing impairment or make the ear function normally.

A hearing aid includes three components: a microphone, an amplifier and a speaker. Sounds are received through the microphone, intensified by the amplifier, and transmitted to the ear through the speaker. The microphone, which picks up sounds from the air, converts them into electrical signals. Once these sounds have been made more powerful by the amplifier, they are changed back into acoustic signals to be heard by the person wearing the hearing aid. In addition to these three components of hearing aids, digital hearing aids also make use of a small computer.

As hearing aids amplify sounds, hair cells within the ear detect these sounds and convert them into signals to pass to the brain. Hearing aids do not work for every person with a hearing impairment. The issues of those with receptive hearing difficulties may not be resolved by hearing aids since the devices are only able to increase volume, not reception. For those individuals, the problem is akin to listening to a radio with static. No matter how loud you turn the volume up, the static remains.

Types of Hearing Aids

There are three basic styles of hearing aids that vary in size, placement and degree of amplification. Determining which style is best for the individual depends on the severity of the hearing loss.

Behind the Ear (BTE)

These hearing aids are worn behind the ear and connected to a plastic mold that is placed inside the outer ear. They are utilized by individuals with mild to profound hearing loss. New technology has introduced a smaller BTE aid consisting of only a small tube placed into the ear canal. This has the advantages of keeping the canal open and protecting the device from damage due to wax buildup. This smaller BTE also provides a clearer sound.

In the Ear (ITE)

These hearing aids are smaller devices that fit inside the outer ear. They can be used for mild to severe hearing loss but are not typically used for children since they will be quickly outgrown.


Canal aids are the smallest type of aid and fit either in the canal, ITC, or completely in the canal, CIC. Because canal aids are so small, they may be hard to adjust and have very limited space for batteries and other devices. Canal aids, therefore, are most frequently recommended for individuals with mild to moderate hearing loss.

Regardless of style, hearing aids work in two different ways depending on how they are electronically programmed.

Analog Hearing Aids

These aids convert sound waves into electrical signals which are then amplified and transmitted back to the ear. They can be custom-made to fit each patient's hearing needs. They can altered by the patient and customized for different listening environments. Analog aids can be used in any style of hearing aid.

Digital Hearing Aids

Digital hearing aids convert sound waves into numerical codes and then amplify them. Some frequencies can be amplified more than others. Digital aids can also be programmed to focus on sounds coming from a certain direction. These aids tend to be more expensive than the analog variety.

Individuals considering the purchase of hearing aids should consult with their doctors in order to make the most sensible choice. Since hearing aids are a costly investment, most manufacturers allow a 30-60 day trial period after purchase to make sure the devices are beneficial for the particular patient. Hearing aids are often a very worthwhile investment for many individuals, resulting in improved hearing and the ability to communicate and socialize.

Assistive Listening Devices (ALDs)

Assistive Listening Devices (ALDs) and other Hearing Accessories ALDs are devices, other than hearing aids, that help the hearing impaired in various situations. Some of these devices work in tandem with the user's hearing aid. Others work independently of hearing aids. Some of the following items are accessories useful for persons without hearing loss.


This is an adapter for hearing aids which allows a person to use blue tooth devices, like a mobile phone, in a hands-free fashion.

Custom Earmold for Cell Phones or MP3 Players

A custom mold attaches to wireless cell phone adapters or personal earbuds. This offers better retention, greater comfort, and superior sound quality.

Hearing Protection

We offer many types of hearing protection for people who work or play near excessive noise levels.

Custom Swim Molds

Custom molds keep ears dry in the pool or in the shower. These are often used by children or adults with chronic middle ear problems or PE tubes.

TV Ears®

This is a wireless headset used for television viewing. It allows the wearer to control the volume they hear independent of the actual volume of the TV. Family members can watch TV comfortably with their hard-of-hearing loved one.


This two-part system includes a link to a person's hearing aid and a remote microphone. The microphone is placed near a speaker to offer direct and wireless communication to the hearing aid user, resulting in better speech-in-noise understanding.

Custom Musician Plugs

These custom molds have special filters that allow for noise protection, while maintaining the integrity of the musical piece.


These disposable ear pieces aid in equalizing pressure during air travel. This product is ideal for patients who have pain on descent.

If you are looking for highly-qualified ENT Doctors in Chestnut Hill to assist with your health needs, Contact us today! 

This service is for non-urgent matters only. Our office will contact you within 24 hours via phone call.
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