Sound quality determines the quality of hearing aids

XNUMX. Sound quality decisionHearing aidQuality

With the development of science and technology, various electronic products emerge in an endless stream, and people have higher and higher requirements for sound quality.The sound quality of the hearing aid is no exception. The sound quality is the sound quality, which reflects the objective technical level of the sound output of the hearing aid, and at the same time integrates some subjective listening experience of the user.The so-called “high sound quality” means that the sound must be processed with “high fidelity”. Only “high fidelity” can guarantee high definition. It can be said that the sound quality determines the hearing aid effect, and the sound quality determines the quality of the hearing aid.

XNUMX. What are the factors that affect the sound quality of hearing aids?

1. Compression technology: Is fast compression better or slow compression better?Fast and slow compression have their own advantages. Generally speaking, slow compression technology is more conducive to the best linear restoration of the language. The language signal has strong contrast and high definition. However, in some specific occasions, fast compression is necessary, so some products use Combined with compression technology: sound stabilizer, which can automatically process the speed according to the speech situation.

2. Non-linear distortion of hearing aids: including distortion caused by digital processing technology, distortion caused by non-linear amplification and distortion caused by certain noise reduction processing.Adopting “high sampling rate” analog-to-digital conversion can reduce the distortion of hearing aid sound; “high-bit” analog-to-digital conversion can reduce the distortion caused by loud input.

3. The response speed of the hearing aid: the slow response speed causes the sound to sound soft, not strong, the sound is weak, and it is easy to produce echo.People with better bone conduction or low frequency have this feeling more obvious.Generally speaking, the low frequency response speed of sound is slower than the higher frequency response speed.Therefore, some hearing aid users who have good low-frequency hearing and poor high-frequency are more likely to feel the feeling of echo and cause the sound to sound unclean and unclear.

4. 助听器的频率响应范围:我们知道正常人耳可听见的频率范围:20Hz-20KHz,言语的频率范围:200Hz-8KHz。助听器频响越宽越不容易感觉喇叭声,声音也就越自然越逼真,有些高档的助听器输出频响曲线可以达到7000Hz。

5. Hearing aid background noise: Background noise has a great impact on users with better hearing or some users with better frequencies. Some high-end hearing aids have a background noise as low as 14dB.At the same time, it is necessary to distinguish the difference between ambient noise and background noise. For example, some high-end hearing aids have a compression threshold as low as 20 dB, and the low-level amplification is sufficient, but normal people will sound very noisy and feel it is noise.

How much do you know about the sound quality of hearing aids?

Link:      Sound quality determines the quality of hearing aids

REF: Hearing AidsHearing Aids Supplier Hearing amplifier
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