The difference between a vibrating acoustic bridge and traditional hearing aid[Advantages and disadvantages comparison]
Compared with traditional hearing aids, Scholars generally believe that both clinical tests and subjective feelings of patients are significantly better than traditional hearing aids, wearing VSC Speech recognition rate, language fidelity, hearing comfort, and high-frequency hearing gain are superior to traditional hearing aids in post-noise environments. The function of a conventional hearing aid is to collect, amplify, and transmit the amplified sound to the external auditory canal and tympanic membrane through a hearing aid. Traditional hearing aids have been greatly improved in technology, and digital hearing aids with convenient adjustment have appeared, but there are still some problems that cannot be solved, and the following limitations:
①Hearing aid ear mold makes many patients feel the occlusion of the external auditory canal and the ear plugging effect occurs;
2 high-frequency hearing gain is insufficient, the low-frequency signal is good, high-frequency signal compensation is relatively poor, and patients often have discomfort when listening to sound;
3 speech sound distortion;
4 There may be a whistling sound when the acoustic feedback phenomenon occurs;
5 due to poor drainage and ventilation, can cause recurrent episodes of otitis externa or otitis media;
6 signal noise is relatively poor, especially in a noisy environment, poor language understanding;
7 causes a variety of inconveniences when using and storing hearing aids;
8 can not meet the needs of all patients with sensorineural hearing loss;
9 patients were unable to wear hearing aids, such as external ear malformations and mastoidectomy.
10 may affect the appearance of beauty, especially young people.
The advantages of the vibrating bridge are:
1 The distortion of the sound is small, so there is better sound quality;
2 There is no ear mold, the external auditory canal is open, the ear is not blocked, and it is not easy to cause infection;
3 There is no acoustic feedback, no whistling;
4 has little effect on appearance.
But the vibrating sound bridge also has many shortcomings:
1 price and surgery costs are relatively high;
2 The main disadvantage is the surgical implantation itself, the treatment of trauma, there is a certain risk of surgery;
3 vibration sound bridge performance has not yet reached perfection;
4 The limitations of indications can not provide satisfactory help to all patients with deafness.
5 direction discrimination is limited. The microphone placed behind the ear bypasses the auricle and the external auditory canal and has no direct discrimination.
6 vibration bridge after implantationMRIThe inspection may be limited.
7 Whether the implanted electronic components can be used for life, whether multiple operations are required, long-term observation studies are still needed.
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