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1. Improve the positioning ability of sound source

The human ear has a strong ability to locate the sound source. However, its prerequisite is that both ears must have the same hearing threshold. In the process of sound transmission in the air, there will be changes in energy and speed. If there is hearing loss and the threshold is asymmetric, most of the sound from any direction will be heard by the side with better threshold, so it is impossible to determine the direction of the sound source. Therefore, binaural selection can better improve the positioning ability of the sound source

2. Improve the ability of noise reduction and speech comprehension

The auricle of human ear has the function of sound collection and noise reduction. For a patient with hearing impairment, it is very important to improve the SNR. Wearing two ears means that both auricles have the ability of sound collection and noise reduction at the same time, which is of great significance to improve the language resolution.

3. Enhance the integration effect of binaural loudness

At the threshold level, the binaural threshold is about 3 dB better than that of the single ear. At the threshold level, the threshold of binaural is about 10 dB better than that of single ear. Therefore, wearing hearing aids on both ears can slightly reduce the overall gain of each hearing aid, thus reducing the possibility of acoustic feedback and improving the battery life. At the same time, for the patients with severe deafness, the probability of hearing aid entering saturation state is reduced, which is more helpful to improve the speech intelligibility after hearing aid.

4. Avoid the delayed auditory deprivation effect

If a patient with bilateral hearing impairment chooses to wear only one hearing aid, the ability of the hearing center without hearing aid to understand the language will gradually decline. In audiology, this phenomenon is called progressive (delayed) auditory deprivation effect, and the longer the time is, the more serious it is. The main reason of hearing deprivation effect is that the ears with hearing aids send enough information to the brain, which makes the brain no longer pay attention to the ears without hearing aids, and the brain seems to give up the attention to the ears that transmit weak signals. In order to avoid this kind of phenomenon, the effective solution at present is to select hearing aids for both ears at the same time.

5. Delay the decline of auditory nerve function

To solve the phenomenon of hearing deprivation is to solve the gradual decline of the function of the central nervous system. Life lies in movement. The nerve cells in the auditory center can achieve the goal of movement by the stimulation of sound. Therefore, it is very important for every patient with bilateral hearing loss to be able to have both ears in a normal state of sound, and to stimulate the auditory nerve through sound stimulation.

6. Improve listening comfort and participate in multi person conversation

Because the binaural optional hearing aid improves the function of sound collection, noise reduction, gain, positioning, balance and fusion of the ear itself, the user will greatly improve the signal-to-noise ratio and excellent listening comfort for the sound signal he hears. Therefore, we can calmly face the needs of multi-party conversation. It will bring great help to study, work, socialize, meeting and so on.

7. Eliminate head shadow effect

If the hearing loss of a patient’s ears is asymmetric, when the sound comes from the direction of one ear with poor hearing, the one ear with better hearing will face the sound source, which is the head shadow effect. Similarly, if both ears have hearing loss (symmetrical or asymmetrical), and only one ear is used when hearing aids are selected, this phenomenon also exists. Because, when the sound source comes from the other ear, the head blocks and attenuates the transmission of sound waves, especially for high-frequency sound higher than 2000Hz, the attenuation can reach 10-17db. Therefore, the definition of hearing aids will be greatly reduced. In our daily matching, it is found that there are quite a number of patients with unilateral matching who are very difficult to listen to the sound from the opposite ear, and tend to face the ear of the hearing aid to the other side. If the patient chooses to wear both ears, the phenomenon of head shadow effect will be solved, and there will be no embarrassment of listening to the voice with one ear, and the voice from multiple sources can be easily heard.

8. Suppress (mask) tinnitus

The amplified sound of hearing aid will inhibit the feeling of tinnitus. If it is only selected on one side, the tinnitus on the other side may still exist, which will affect the comfort and clarity. Therefore, for the deaf patients with tinnitus or encephalonitus, in order to improve the comfort and intelligibility of listening, we should try our best to match the two ears, which can not only improve the listening effect, but also eliminate tinnitus.

9. Prevention of unilateral hearing fatigue

Most patients who use hearing aids on one side, due to the lack of integration effect, noise reduction and sense of orientation. In order to hear or hear some sounds, we often take unlimited methods to increase the volume of hearing aids. As time goes on, the brain’s auditory nerve adapts to loud sounds, which will cause the threshold of hearing to increase. Since the wearing of both ears can improve the integration effect, noise reduction and orientation ability, it will provide relatively high comfort and signal-to-noise ratio for the ears, so as to avoid the frequent unilateral increase of volume and prevent hearing fatigue.

10. Reduce ear blocking effect

The ear blocking effect is a subjective feeling that can significantly increase the loudness of low-frequency sense of self generated sound (such as speaking, chewing, swallowing, walking, etc.). When a person’s external auditory canal is blocked, the low-frequency energy below 1000Hz generated when he speaks cannot be effectively released through the external auditory canal. We found that in the daily matching process, when the external auditory canal is closed, the larger the space left in the internal auditory canal, the lighter the feeling of blocking the ear, otherwise the more serious. As the wearing of both ears can improve the integration effect, especially the energy integration of low-frequency sound is reduced, and the overall output gain of the hearing aid can be reduced, so the shell or ear mold of the hearing aid can be made short and loose, and the air hole can be increased, so as to leave as much space as possible in the inner part of the ear canal. In order to reduce the trouble caused by ear blocking effect. It has been proved in practice that the blocking effect of the first fitting or wearing of one ear is greatly reduced after wearing of both ears.

Therefore, as long as there is hearing impairment in both ears, and there are no other contraindications, we must try our best to choose two ears for fitting. Let our patients realize that: 1. It is better to wear hearing aids than not; 2. It is better to wear them earlier than later; 3. The overall effect of wearing two ears is better than wearing one ear.

Jinghao hearing aid reminder: hearing aid wearing requires professional “matching”, so it is very important to choose a professional hearing aid matching center and a hearing aid tester! If you have any hearing problems, you can call Jinghao for consultation, or come to the matching center for experience. Hearing aid free consultation Tel.: + 86-18566295705


Link:Ten benefits of hearing aid

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