SensorineuralHearing loss, Especially for patients with perceptual, cochlear or inner ear hearing loss, quite a lot of people have the phenomenon of rejuvenation.Recruitment, also known as reverberation or recuperation, is a pathological phenomenon.
Generally speaking, revival refers to Loudness Recuitment.The sound loudness experienced by people with normal hearing function changes with the sound intensity, and its change is dependent on a certain ratio.Some people whose inner ear hearing is impaired feel that the increase in sound loudness exceeds the rate of increase in intensity to varying degrees, that is, the patient is more sensitive to stronger sounds, and those with rejuvenation will have the ability to endure when exposed to strong sounds. Significantly reduced, even can’t stand it.The inability to hear the weaker sound is the most significant feature of the affected ear with the rejuvenation phenomenon.Therefore, when such patients wear hearing aids, the volume cannot be heard when the volume is turned down, and the volume cannot be tolerated when the volume is turned up, and it is difficult to adjust the volume to a suitable position (volume).
normalHearing aidBecause these characteristics of rejuvenating hearing are not considered, it cannot improve hearing, and even cause changes in hearing. People who don’t know much about hearing aids and audiology often think that patients with sensorineural hearing loss should not wear it.Hearing aid.If it is designed according to the characteristics of the affected earHearing aid, There will be a good effect on the affected ear with rejuvenation.
The hearing range of normal people is from 0dB to 120dB.The optimum loudness level is between the uncomfortable loudness and the hearing threshold, that is, 60dB.The hearing range of the rejuvenated ear is narrower than that of the normal ear and the conductive ear. The range between the uncomfortable loudness and the hearing threshold is less than 120dB, and the optimum loudness is not in the middle of the hearing range, but to the side of the uncomfortable loudness.
Since the hearing range and comfortable loudness range of rejuvenating the affected ear are narrower than normal ears, when a hearing aid is fitted, if the dynamic range of the sound output of the hearing aid is greater than its comfortable loudness range, the user must have a sense of discomfort, not only cannot compensate for hearing, but on the contrary Will make his hearing worse.
Only by designing hearing aids based on these characteristics of reinvigorating the hearing of the affected ear can the affected ear obtain a better use effect. Such hearing aids should have the following characteristics:
1) Regardless of the loudness of the external sound input to the hearing aid, especially the sudden strong sound entering the hearing aid, the maximum sound output of the control hearing aid must not exceed the uncomfortable loudness level UCL of the affected ear, so that the affected ear will not feel pain.
2) The sound output of the hearing aid must be centered on the optimum loudness. The dynamic range is generally consistent with the comfortable loudness range, and the discomfort loudness level of the affected ear must not exceed the loudness level of the affected ear. In this way, the loudness of the sound heard by the affected ear through the hearing aid is basically the same. Within the comfortable loudness range.
3) Because the hearing range of the affected ear is narrower than normal ears and conductive hearing loss, the sound output range of the hearing aid is controlled to be narrower than the sound output of ordinary hearing aids. Because different reinvigorated persons have different hearing ranges, it is required The output range of the hearing aid is adjustable.
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