How to choose a hearing aid for hearing loss patients with a sharp drop in hearing?

Case Studies

Basic Information:

** 29year old Male

The condition of the ear canal: the ears are smooth, the tympanic membrane is intact, and the history of otitis media and family history are denied.

Ten years ago, I took a brand hearing aid.CIC, the effect is not obvious and not comfortable, wear2It will not be used again in the month.

Hearing loss: The main complaints have hearing loss from childhood, occasionally tinnitus, communication in normal quiet environment is acceptable, whispering or noise environment communication is difficult, need to combine mouth type. The patient himself suspected of hearing loss caused by an injection at a young age.

Hearing test:

Left ear hearingRight ear hearing

Average hearing of the left ear:>96.25dBHL

Average hearing of the right ear:>96.25dBHL

The user is a very severe sensorineural hearing loss on both sides, and is also a high frequency steep drop type hearing loss.

User expectations:

●Be able to meet daily communication, no need to repeat words repeatedly by family, not to listen to mouth type

●You can hear clearly by phone.

●Multiple people can hear clearly

●Sleeved to wear, it is best to be small and concealed

Processing method:

Based on patient appeal and hearing, we recommend BertoneTST1763And PhonakAudeo M70Listen.

Audition evaluation:

Audition evaluation chart

The results of the sound field assessment are within the speech banana map.

The user feedback on the spot, after using the hearing aid, the small voice communication obviously hears much better, no matter which direction the voice language can be heard, and can judge the source of the sound. On the spot, I experienced a direct phone call, and I can easily communicate with each other on the phone. There is also a sense of melody listening to music.

Analysis discussion

How to compensate for the steep drop hearing loss?

● Comfortable to wear, acceptable sound quality (no whistling, no ear blocking)

As the primary goal of the fit, it is comfortable to wear and the sound quality is very important in a quiet environment.

We know that for the hearing-impaired people with steep drop-type hearing loss, they often communicate without wearing a hearing aid in a quiet environment. They feel that they do not need to wear a hearing aid, so they may wait.10To20Only consider the choice of hearing aids. In addition, the high-frequency hearing loss of the steep drop type hearing loss is serious, and the hearing aid is prone to whistling when giving high frequency compensation; while the low frequency hearing is better, the closed earplug or the ear mold is easy to produce the ear blocking effect, so that the hearing impaired person Listening to your own voice feels bigger, or like in a bucket.

In combination, the hearing aids selected for the hearing loss of the sharp drop type hearing loss need to be comfortable to wear, and the sound quality is natural in a quiet environment, without screaming, not blocking the ear, otherwise it is easy for them to feel better than not wearing.

Therefore, the primary target of the fitting is actually the choice of the hearing aid. The shape is comfortable to wear (such as the open ear fitting hearing aid), and the sound quality natural hearing aid is selected from the performance, so that the first wearer is willing to accept the sound of the hearing aid. .

According to clinical experience, open hearing aids with better feedback suppression are generally used for mid-range and above.

For steep drop-type hearing loss, moderate processing of high-frequency gain (such as proper gain reduction) and appropriate increase of audibility (ie, gain) in the IF transition zone can better assist the hearing-impaired person in understanding speech.

● Do you want to use frequency shifting?

For steep drop hearing loss, do you want to use frequency shifting? This problem varies from person to person. At present, most hearing aid manufacturers’ fitting software needs to determine whether to turn on the frequency shift function according to the audiogram situation, and often the frequency shift is turned on in severe and above hearing loss, which is also to provide a more natural sound quality for the hearing loss patients. .

Of course, if after the fitting and debugging as described above, the patient wants to hear more high frequencies, especially the noise environment, you can try to use frequency shifting, but the frequency shift is not our highly recommended steep drop hearing loss. Required debugging method.

This case patient high frequency from1500hzIt will not be detected in the future, or it is recommended to turn on the frequency shift.

Finally, summarize the fitting techniques of steep drop hearing loss.

● Hearing aid selection suggestion: mid-range and above, open hearing aid with better feedback suppression;

● Gain compensation suggestion: based on the target gain obtained by the prescription formula, the low frequency is less compensated or not compensated, the high frequency is less compensated, and the intermediate frequency is excessively compensated;

● Function debugging suggestions: Try to shift frequency as appropriate; use appropriate noise reduction function to improve signal-to-noise ratio and optimize speech understanding in noisy environment.

Link:How to choose a hearing aid for hearing loss patients with a sharp drop in hearing?

REF: Hearing Aids Supplier Hearing amplifierITE hearing aids
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