Different hearing loss patients with the same hearing and the same daily listening difficulties will have different hearing aid effects after using the same hearing aid. Why? What factors are the effects of hearing aid related to?
What is the daily life performance of different levels of hearing loss?
Mild: hearing loss occasionally can not hear clearly, which is obvious in noisy environment;
Moderate: hearing loss people can still talk at close range, but there will be alternative words and misinterpretation; hearing aids are very effective for them;
Severe: people with hearing loss can hear clearly and loudly, but they can’t hear well in noisy environment, their residual hearing is OK, and the effect of wearing hearing aids is better;
Extremely severe: can hear loud and near sound, the effect of wearing hearing aids completely depends on the residual hearing level and resolution of hearing loss. If the resolution is poor, the effect of wearing hearing aids is not ideal, and other senses may be needed.
2. How does the gradient of hearing loss affect the effect of hearing aids?
Most of the hearing curves are flat type or gradual decline type, while steep drop type, groove type or irregular type are rare, especially low-frequency sudden drop and fragment type. The flatter the audiogram, the better the effect of wearing hearing aids.
What is the effect of speech resolution on hearing aids?
Speech resolution ≥ 90% good effect
70-90% speech resolution slightly improved
Speech resolution 50-70% has substantial improvement
Speech resolution ≤ 50% is not ideal
What are the disadvantages of single ear selection?
Single ear selection refers to bilateral hearing loss, but only one hearing aid is selected. Its side effects include shadow effect and hearing deprivation effect.
5 what are the advantages of binaural selection?
Generally, as long as the binaural hearing loss and no contraindications for binaural selection, binaural selection is recommended. The direction of the sound source can be judged when the two ears are equipped with Siemens hearing aids when they feel the sound, and the range of the sound can be enlarged obviously to improve the speech intelligibility under the noise environment. The more serious the hearing loss is, the more important it is to choose a pair of ears.
What is omnidirectional microphone?
Omnidirectional microphone, which is suitable for quiet environment, can receive sound in all directions equally. In the speech environment of noise, omnidirectivity can enlarge the speech and the surrounding noise, which is not conducive to the understanding of speech.
What is a directional microphone?
The directional microphone has two microphones, one front and one back. Directional microphones are classified according to the polarity map and have many forms. For example, the heart-shaped pattern is much more sensitive to the voice from the front than the voice from the back. It is suitable for speech environment in noise.
What is linear amplification?
Linear amplification is to output the input signal with a constant amount of amplification until it reaches saturation. Siemens hearing aid has an inherent maximum output level. If it exceeds this level, the amplification will stop automatically. Linear amplification is commonly used in old hearing aids, which is suitable for hearing loss patients who need a lot of hearing aids. At present, linear amplification circuit is not common because of the residual hearing loss.
9 what is compression technology?
Compression technology, i.e. nonlinear amplification, controls the gain of input signals with different intensities by changing the compression inflection point and compression ratio manually or automatically, so that not only the loud signal can be accepted, but also the environmental noise and microphone noise will not become a kind of interference again, which greatly improves the hearing satisfaction of hearing impaired people. Compression circuit is the most widely used technology at present.
What are the advantages of digital signal processing?
Digital signal processing is to transform acoustic signal into digital signal represented by 0 and 1 by analog-to-digital converter, and then process it. The advantage of this kind of digital signal is that its essence is quite simple, on the basis of which many complex calculations can be carried out, and through proper sampling and analysis, the digital signal will not have the problem of distortion. Digital platform provides a variety of working modes of microphone, omnidirectional, directional, adaptive directivity, etc. its purpose is to improve speech clarity in noisy environment and improve the wearing effect of hearing aids.
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
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