Hearing aid selection

Q:
My father is over eighty years old and has a severe decline in hearing. I want to buy a hearing aid for him. Some of his old colleagues bought hearing aids for a few hundred dollars, saying they work well; some had their hearing aids fitted in professional institutions after examination in the otolaryngology department of the hospital, which cost tens of thousands of dollars. Why is there such a big difference in price?

:A
From the patient’s own experience, the difference between the two types of hearing aids lies in the sound quality. We usually mention sound quality when choosing headphones or home audio equipment. For people with normal hearing, even with poor sound quality headphones or audio equipment, they can still hear the lyrics in the song; but for patients with hearing loss, wearing a hearing aid with poor sound quality will make it difficult to distinguish what the song lyrics are singing.
The difference in sound quality of hearing aids is due to the technical differences in the chip’s processing of sound. Professional hearing aids spend a lot of research and development funds and time to improve sound quality. That is to say, the research and development cost of hearing aids with good sound quality is high, which means that hearing aids that can hear clearly will be more expensive. Hearing aids that cost a few hundred dollars are analog hearing aids, which do not contain chips, but are just simple amplifiers of sound, amplifying environmental noise and speech indiscriminately. We often hear patients complain in our work that “hearing aids can’t be worn, they are too noisy, and wearing them will make you deaf.”

Q:
What are the types of hearing aids and how should they be chosen?

:A
When choosing a hearing aid, we can consider the following aspects.
01
Hearing aids can be divided into and digital types according to the way they process sound signals.
● Analog hearing aids, as mentioned earlier, have simple amplification circuits and rough sound processing, and are not.
● Digital hearing aids use digital signal processor chips, which can convert sound signals into digital signals and then process them through complex algorithms, such as noise suppression, feedback suppression multi-channel compression, etc., to more precisely compensate for hearing loss and provide clearer and more natural sound. Audiologists can also program and adjust them individually according to the hearing and usage scenarios of different patients.
02
In terms of appearance, hearing aids can be divided into box-type hearing aids, behind-the-ear hearing aids in-the-ear hearing aids, and deep-in-the-ear hearing aids.
● Box-type hearing aids have already faded out of the market due to large size, inconvenient wearing, and analog line amplification.

● Behind-the-ear hearing aids have a wide range of applications. From degree of hearing loss, there are different power BTE hearing aids for common mild, moderate, moderately severe, severe, and profound hearing loss.

In terms of the target, behind-the-ear hearing aids are suitable for patients with hearing loss at all ages, especially for children and adolescents, because their external auditory canal is still developing, and-the-ear hearing aids can be easily replaced with earmolds to adapt to the changes in the auditory canal. Moreover, since behind-the-ear hearing aids can matched with a variety of wireless devices, deaf children can use FM wireless transmission systems in their studies to hear what the teacher is teaching more clearly.
● In-the- hearing aids are customized according to the shape of the patient’s auricle or auditory canal and are worn inside the ear, making them more discreet in appearance. Moreover, they are built into the ear canal, the sound quality will be better, making them suitable for people with mild, moderate, and moderately severe hearing loss



How to choose a hearing aid that suits you? It is recommended to choose an audiologist you trust. The audiologist will recommend a hearing aid suits you according to the nature and degree of your hearing loss and your needs in life and work. The audiologist will use their professional knowledge and technology to program and adjust the of the chip inside the hearing aid, so that the hearing aid can give full play to its maximum performance and help you face various listening scenarios in daily life. The hearing industry often “three points depend on the machine, seven points depend on the fitting”, which shows the importance of the audiologist in the initial selection and later use of hearing aids

Q:
How to fit a hearing aid specifically, can you introduce the overall process?

:A
The professional fitting of hearing aids can be divided into the following process.
- Appointment: Because the fitting process takes a certain amount of time, please make an appointment with the audiologist in advance.
- Medical examination: Collecting medical history, ear examination, audiological examination (children also need to complete mental and intellectual examination, laboratory examination and imaging examination).
- Diagnose the nature and degree of deafness: Determine that the use of hearing aids is the best choice for hearing rehabilitation, and there are no contraindications.
- Comprehensive analysis of the condition and needs: Select the type of hearing aid.
● Enter the test results and general information into the software.
● Open the manufacturer’s specific software, select the type of hearing aid.
● Select the prescription formula suitable for the patient and calculate the target curve.
● Make an ear mold or custom machine shell.
● Select a specific hearing aid, which can be pre-selected with an in-the-ear hearing aid of the same line.
● Fill in the production order according to the audiogram and ear mold.
● Take back the ear mold or custom machine, check the function and test the acoustic indicators.
● The patient wears a hearing aid, performs real ear testing, sound field testing to adjust the fitting, and makes the actual measured value close to the target value as much as possible.
● Adjust the parameters (programming) according to the patient’s response, and improve the hearing aid when necessary.
● Effect measurement, appoint the next follow-up time (children must be re-tested multiple times with sound field or real ear response).
The fitting of hearing aids needs to be adjusted several times to ensure that the hearing aids can perform at their best.


