What is IIC hearing aid ? What are the advantages over others hearing aids ?Cindy
With the development of science and technology, the components of hearing aids have become smaller and smaller, more and more sophisticated, and the degree of integration has become higher and higher, and even small hearing aids that can be placed in the ears have been completely hidden. Hearing aid.
Ultra-invisible hearing aids are the latest and smallest hearing aids developed in recent years. They are about 20% to 30% smaller than the smallest complete ear canal hearing aids, and can reach 100% when viewed at 90 degrees from the side of the wearer. Invisible, it also has a series of advantages in acoustics. It is a high-end product in the category of hearing aids. It is mainly targeted at people with reduced hearing requirements for appearance and sound quality.
Super invisible hearing aid is also called IIC invisible hearing aid. IIC is the abbreviation of invisible in canal, which means completely invisible hearing aid.
Traditional in-the-ear hearing aids are divided into ear-canal hearing aids (ITE), semi-ear-canal hearing aids (HS), ear canal hearing aids (ITC), and complete ear canal hearing aids (CIC). Super invisible hearing aid is a new type of hearing aid developed on this basis. Its shape is much smaller than the volume of traditional CIC. The wearing position of the main part is within the second ear canal curve, and the panel is within the first ear canal curve. .
For hearing impaired patients, hearing aids are currently a great weapon that can help them resume communication. Of course, it ca n’t be compared with our real ears. Therefore, Hearing Hearing pointed out that a scientific attitude should be established with the professional advice of experts Reasonable expectations are very important.
Compared with other types of hearing aids, IIC has significant advantages. The hearing sense can be summarized as follows:
1. Helmholtz resonance effect
Because the auricle has the function of reflecting and refracting sound waves, when the sound enters the ear canal, the sound pressure increases between 4000 and 5000 Hz, and there is a resonance of 6 to 8 dB. That is to say, the sound is in this range and before entering the microphone Already zoomed in. Ultra invisible hearing aids are located deep in the ear canal and do not affect the resonance function of the ear cavity.
The specular effect refers to the auricle effect. The auricle can amplify the high-frequency sound and attenuate the low-frequency sound. Auricle For sounds greater than 2000 Hz, its gain increases with frequency, which is the auricle effect. The auricle effect is related to its measurement point. If it is measured at the microphone position of an ultra-invisible hearing aid, then this effect is obvious. This phenomenon is actually very stable.
Ultra-invisible hearing aids are located deep in the ear canal, causing the volume of the external ear canal to decrease. According to the relationship between pressure and volume, the volume decreases and the pressure increases. Therefore, it is generally considered that compared with an ear canal hearing aid of the same power, the low-frequency output of the invisible hearing aid is 5dB higher and the high-frequency output is 10-17dB higher.
4.Reduce ear plugging effect
Ultra-invisible hearing aids are located deep in the ear canal, mainly the outer ear canal bone. When the patient makes a sound, the sound waves caused by the resonance of the cartilage part of the external auditory canal wall are leaked out, and the sound waves generated by the bone vibration are less, so the ear plugging effect can be reduced.
The auditory way reminds the fitter to pay attention when fitting the hearing aid, because the IIC outlet is closer to the eardrum, so when selecting the hearing aid parameters, the gain can be reduced by 3dB based on the CIC.