How to choose digital hearing aids?Cindy
Digital hearing aids are divided into all-digital hearing aids and semi-digital hearing aids.We input the hearing signal of the hearing aid, the hearing aid that needs to be processed by the digital signal processor (DSP) for analog and digital analog conversion, called all-digital hearing aid or pure digital hearing aid.Semi-digital hearing aids are also known as digital hearing aids, digital hearing aids, numerically controlled hearing aids, digitally programmed hearing aids, and computerized hearing aids.Its input and amplification parts are analog, and only the output part is digital, so it is called a semi-digital hearing aid.
How much does the digital hearing aid know the knowledge of all-half digital hearing aids?
How to choose a digital hearing aid
At present, the digital hearing aid market is highly competitive. Each digital hearing aid manufacturer has a variety of hearing aid models, which makes deaf patients face a lot of products.Here we suggest that deaf patients should choose from several aspects when they choose digital hearing aids: 1 the nature and extent of deafness; 2 the needs of the individual, that is, the effect requirements and appearance requirements of the digital hearing aid; 3 people’s economic affordability.
For patients, the selection of a suitable digital hearing aid, the first task is to carefully choose a formal selection mechanism and a professional, qualified hearing aid option, in order to ensure that the digital hearing aids are adjusted to the most Good state.In clinical practice, we often see that some patients use high-end hearing aids, but because they are not properly adjusted, they do not perform as they should.
Although the hearing aid has been developed to be digital, the use of the hearing aid may partially or completely enclose the external auditory canal, thereby changing the resonance peak of the ear canal, making the sound unnatural, the positioning ability is deteriorated, and the outer ear is uncomfortable.Digital hearing aids also often have problems such as feedback whistling, distortion, and the image of the wearer.Furthermore, digital hearing aids often have a reduced life span due to moisture, vibration and deafness.These problems can cause inconvenience to the user.
Therefore, it is the key to prevent deafness among middle-aged and old friends. Wearing digital hearing aids can only serve as a remedy.
The advantages of all digital hearing aids
The function of the digital sound processor of the semi-digital hearing aid is incomparable with the all-digital hearing aid.All digital hearing aids have the following functional advantages:
1.Intelligent features automatically identify noise and speech environments and switch programs.
2.Gain processing The ability of a hearing aid to amplify sound is the primary physical property of a hearing aid, which we call gain.
The purpose of the patient’s optional hearing aid is to obtain the maximum compensation for the audibility under comfortable conditions. This requires the hearing aid amplifier to have low noise, no distortion of signal amplification, wide enough frequency response, flexible adjustment of high, medium and low frequency sound, large , medium and small volume can be controlled.The “heart” of all-digital hearing aids – DSP has powerful processing functions, enabling the hearing aid to perform multi-band adjustment and multi-channel compression control on the input signal to ensure its above characteristics.
3.Feedback whistle treatment of patients with severe deafness often results in feedback squeaking due to lack of tight ear canal closure, and some patients with mild deafness also produce feedback whistling.The feedback suppression circuit of the all-digital hearing aid can eliminate or partially eliminate the feedback howling.There are two common circuits.One of them does not affect the signal output of the hearing aid while eliminating the feedback whistle; the other has less influence on the output power of the hearing aid.
4.Noise Processing In noisy environments, the effects of using hearing aids can be affected, and patients will feel uncomfortable if they are used in such an environment for a long time.The digital noise attenuation processor of the all-digital hearing aid can recognize and attenuate steady-state noise (such as noise generated by refrigerators, automobiles, computers, etc.).It is worth noting that: so far, no all-digital hearing aid can separate the noise from the speech, only to attenuate the noise and the speech with the same frequency as the noise in the corresponding channel.For this, we should not listen to the exaggerated and untrue propaganda in the advertisement.
5.Language Enhancement (Spectrum Lifting Processing) Technology The sensory neurological deafness patient’s recognition of the sound frequency is reduced, that is, the speech recognition power is reduced.Scientists use spectrum boosting techniques to make the distinction between vowels and consonants more apparent, in order to improve the speech recognition of deaf patients.
6.Directional microphone (dual microphone) management technology scientists have long confirmed that directional microphones can effectively improve the signal-to-noise ratio of hearing aids, but because directional microphones have their own shortcomings, they are not widely used until hearing aids are not fully digital.Thanks to the use of digital signal processor technology, all-digital hearing aids can automatically calibrate the matching of the two microphones, making them more flexible depending on the environment of the different sounds.
7.Signal Generator Technology The DSP of the all-digital hearing aid not only has the function of amplifying sound, but also emits sound.At this point, the hearing aid can be used as an audiometer to measure the hearing and loudness of the deaf in situ (with a hearing aid).This improves the adjustment accuracy of the hearing aid and makes the patient’s use of the hearing aid better.
8.User-friendly full-digital hearing aids have: 1 low battery prompt: When the battery is low, it can automatically send a reminder to remind the patient to replace the battery.2 boot delay function: can avoid feedback squeal stimulation when the patient wears the hearing aid.3 multi-memory programs: to meet a variety of use needs, such as quiet environment, noisy environment, listening to music, making phone calls, etc.4 Automatically eliminate wind noise.5 plug ear effect adjustment.
After nearly a decade of development, all-digital hearing aids have low, medium and high-end products suitable for a variety of consumer groups.
· Low-end all-digital hearing aids have digital amplification function. The number of channels is generally 1 or 2, and the price is about 50USD.
· Mid-range all-digital hearing aids have feedback suppression and 3 to 4 channels of noise attenuation, and the price is about 120USD.
· High-end all-digital hearing aids have noise suppression and feedback squealing suppression function, adaptive directional microphone, multi-channel compression, multi-program memory (3 to 4), spectrum boost and other functions, the price is about 3000USD.