1, improve sound source positioning
The human ear has a strong sound source positioning capability. However, its prerequisite is that both ears must have the same hearing threshold. During the transmission of air, there will be changes in energy and speed. If the hearing loss and the threshold are asymmetrical, most of the sound from any direction will be heard by the better hearing threshold, so that the sound source cannot be determined. The direction. Therefore, the binaural option can better improve the positioning ability of the sound source.
2, improved noise reduction and speech understanding
The auricle of the human ear has a sound collection and noise reduction function. For a hearing-impaired patient, it is important to improve the signal-to-noise ratio. Wearing the ears means that the two auricles have both sound collection and noise reduction capabilities, which is of great significance for improving language resolution.
3, enhanced binaural loudness integration effect
The acoustics accepted by binaural hearing are higher than the single ear. At the threshold level, the binaural threshold is better than the single ear threshold by about 3 decibels. At the threshold level, the binaural threshold is better than the single ear threshold by about 10 decibels. Therefore, wearing the hearing aid with both ears can slightly reduce the overall gain of each hearing aid, thereby reducing the possibility of acoustic feedback and increasing the battery life. At the same time, for patients with severe paralysis, the probability of the hearing aid entering saturation is reduced, which is more helpful to improve the speech intelligibility after hearing aid.
4, avoiding delayed hearing deprivation
If a patient with bilateral hearing impairment chooses to wear only one hearing aid, then the ability of the auditory center without the hearing aid ear to gradually understand the language will gradually decline. This phenomenon is called progressive (late) in audiology. Sexual deprivation effect, the longer the time, the more serious. The main reason for the auditory deprivation effect is that the ear of the hearing aid conveys enough information to the brain that the brain no longer pays attention to the ear without the hearing aid, and the brain seems to give up the attention to transmitting the weaker signal ear. In order to avoid this phenomenon, the current effective solution can only be the simultaneous selection of hearing aids in both ears.
5, delaying the decline of auditory nerve function
Solving the phenomenon of auditory deprivation is to solve the progressive decline of the central nervous function. Life is in motion, and the nerve cells in the central nervous system can achieve the purpose of exercise by the stimulation of sound. Therefore, it is very important for each patient with bilateral hearing loss to be able to have both ears in a normal vocal state, and to stimulate the excitation of the auditory nerve by acoustic stimulation.
6, improve listening comfort, participate in multi-person conversations
Thanks to the binaural optional hearing aid, it improves the ear’s own sound collection, noise reduction, gain, positioning, balance function and fusion effect. The user can greatly improve the signal-to-noise ratio and excellent listening to the sound signal heard. Comfort. Therefore, it is possible to face the need for multi-party conversations with ease. Great help for learning, work, socializing, meetings, and more.
7, eliminating cephalometric effects
If the hearing loss of a patient’s ears is asymmetrical, when the sound comes from the direction of the ear with poor hearing, the ear with the better hearing will be directed towards the sound source. This is the cephalometric effect. Similarly, if both ears have hearing loss (symmetric or asymmetrical), this is also the case if only one ear is worn when the hearing aid is selected. Because, when the sound source comes from the other side of the ear, the head can hinder and attenuate the transmission of sound waves, especially for high-frequency sounds higher than 2000Hz, the attenuation can reach 10-17dB. Therefore, the clarity of the hearing aid is greatly reduced. In our daily fittings, it was found that a large number of patients with one-sided options would be very difficult to hear from the contralateral ear, often with the hearing aids facing the other side. If the patient chooses to wear both ears, it will solve the phenomenon of head shadow effect, and there will be no embarrassment of listening to the sound of the ear, and it is easy to listen to the sound from many parties.
8, suppression (masking) tinnitus
The amplified sound of the hearing aid suppresses the feeling of tinnitus. If it is only a one-sided option, the tinnitus on the other side may still exist, which will affect comfort and clarity. Therefore, in order to improve the comfort and intelligibility of listening, it is necessary to strive for binaural matching in order to improve the listening comfort and the hearing loss and the feeling of eliminating tinnitus.
9, prevention of unilateral auditory fatigue
Most patients who use hearing aids on one side have a lack of integration, noise reduction and orientation. Often, in order to hear or hear certain sounds, an unrestricted method of increasing the volume of the hearing aid is taken. Over time, the auditory nerves of the brain adapt to loud sounds, which can cause the hearing threshold to increase. Because the binaural wear can improve the integration effect, noise reduction and orientation ability, it will provide the ear with higher comfort and signal-to-noise ratio, which will avoid the unilateral increase of the volume and prevent hearing fatigue.
10, mitigating the ear blocking effect
The ear plugging effect is a subjective sensation of a low-frequency perceived loudness that produces sounds (such as speaking, chewing, swallowing, walking, etc.). When a person’s external auditory canal is blocked, the low frequency energy below 1000Hz generated by himself can not be effectively released through the external auditory canal. We found that in the daily fitting process, the larger the space left inside the ear canal when the external auditory canal is closed, the lighter the feeling of blocking the ear, and vice versa. Since the binaural wear can improve the integration effect, especially the energy integration of the low-frequency sound is reduced, and the overall output gain of the hearing aid can be reduced, the outer casing or the ear mold of the hearing aid can be made loose and ventilated under the condition of permission. Increase, leave as much space as possible inside the ear canal. In order to reduce the trouble caused by the plugging effect. Practice has shown that for users who are initially fitted or unilaterally worn, the occlusion effect is greatly reduced after the bilateral ears are worn.
Therefore, as long as there are hearing impairment in both ears, and under the premise of confirming that there are no other contraindications, it is necessary to choose binaural fitting. Let our patients realize that 1, wearing a hearing aid is better than not wearing a hearing aid; 2, early wear is better than late wear; 3, binaural wear must be better than single ear wear overall.
Jinghao medical hearing aid reminder: hearing aids need to be professionally “fitted”, it is very important to choose a professional hearing aid fitting center and hearing aid fittings! All patients and friends have any hearing problems can call the Jinghao medical consultation, or personally Come to the fitting center experience. Hearing aid free consultation phone: +86-18566295705
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Link：Ten benefits of wearing a hearing aidREF: Hearing aids China, Bluetooth Hearing Aids, Hearing amplifier
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