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厂家关于高频重塑技术的说明

 

由厦门益耳助听器专家根据峰力公司相关资料翻译,转载时请注明出处。

 

Further detailed slides and illustrations showing competitive approaches compared to SoundRecover are available in the original Naída seminar package and the dedicated SoundRecover presenation<<
有关SoundRecover功能更深入的对比与阐释,您可以在原峰力美人鱼产品研讨会资料,及峰力编写的“高频重塑造”白皮书上看到。

 

We introduced SoundRecover around the world and fitters started asking why just for Naída? Why not offer SoundRecover for all types of HL?
我们曾经在全球举行了峰力高频重塑技术的推广介绍会。验配师们开始置疑,是否只有美人鱼的适应用户才可以采用这种高频重塑技术?为什么这个技术不能应用于所有的听力损失患者?

 

We could have introduced SoundRecover for mild and moderate losses at the same time but we didn’t want to add a feature just for the sake of it.
本来,我们完全可以在推广会中说,美人鱼的高频重塑功能同时也适用于轻-中度听力损失患者,但我们不想不经科学论证,为了加上一个功能而加上一个功能。

 

SoundRecover was developed for severe to profound HL. With the great success and your request we started research for SoundRecover and mild-moderate HL.
高频重塑研究的初衷是为了满足重度-极重度听力损失患者的需要。在我们取得了巨大成功的同时,以及应大家的要求, 我们就高频重塑功能是否能应用于轻度到中度听力损失人群也开始了研究。

 

This is an amazing example that shows beautifully the process of acclimatization in adults. Before SoundRecover, this 52 year old man is hearing and producing an /r/ instead of a /z/. After 2 months it is clear that he is starting to hear more high frequencies but is producing a /sh/ and not a /z/. After 3 months, pronunciation of /z/ is clear and appropriate.
Recordings were made courtesy of Andrea Bohnert at the University Hospital for ENT and Communication Disorders, Mainz, Germany.
面是一个关于成人通过适应来使用高频重塑功能并获得了成功的案例。在使用高频重塑前,一位52岁的老人把/z/音听成并发成/r/音。在2个月的适应期后,他明显可以听到更多高频区域的声音,但当听到/z/时,这位老人发出的音仍然是/sh/,而不是/z/,但已经非常接近了。在3个月的适应期后,他可以正确地听到并发出了/z/音。

 

This is just one story about the benefit of SoundRecover for moderate to severe and profound HL.
这只是高频重塑功能使中度到重度/极重度听力损失患者受益的案例中的一个。

 

SoundRecover, a Phonakproprietary algorithm, is designed to compress and shift high frequencies into an adjacent area of audible hearing.
高频重塑功能是瑞士峰力听力集团独有的一种助听器信号处理方法。它的设计理念是将高频区域患者原本听不到的声音压缩并转移到相邻的频率。

 

This unique approach enables high-frequency information to be compressed with minimal artifacts.
这种独特的声音信号处理方式使得高频区域的声音信息在被压缩的时候尽可能地保持自然音质。

This shows how the cut-off frequency varies depending on the degree of hearing loss. Now we can offer SoundRecoverto a whole range of audio configurations and are no longer restricted to the severe and profound high frequency losses.
截止频率的设置随着患者听力损失的情况不同而不同。因此,现在不光重度到极重度听力损失患者可以使用峰力的高频重塑功能, 所有的听力损失人群都可以从中受益。


Severe – profound: high cut of frequency, high compression rate

Mild – moderate: low cut of frequency and low compression rate
重度-极重度听力损失人群:采用较高的截止频率和高压缩比

-中度听力损失人群:采用较低的截止频率和低压缩比

 

Those frequencies below the cutoff remain unchanged. Depending on the cuttoff frequncy, variable levels of compression are applied to the high High frequencies which are compressed and lowered. Hence the term "non-linear frequency compression“.
截止频率之前的声音的放大并没有发生任何变化,但截止频率之后的高频区域依据不同的压缩比而被压缩、转移到了较低频率区域。因此,峰力的高频重塑功能被人们称为一种非线性的频率压缩技术


Now! we Know that all audiometric configurations can profit from SoundRecover. Audéo YES was the first product offering the benefits of SoundRecover for clients with hearing loss outside the power segment. Since then, Exélia Art, Nios micro and now Audéo MINI and SMARTalso all employ this Phonak exclusive. A SoundRecover solution is available for all audiometric configurations, ages and needs.

现在,我们知道了所有听力损失人群者可以从高频重塑功能里受益。奥笛YES是第一款超越了功能限制的使用高频重塑功能的产品。打那以后,神话王、小天使、以及即将上市的奥笛迷你系列和奥笛Smart系列也拥有了峰力独一无二的高频重塑技术。现在,高频重塑功能可以满足不同听力损失程度、类型、年龄的用户的需求。

 

Let’s briefly review the frequency transposition schemes that have been tried.
让我们来共同回顾一下以前市场上采用过的移频技术。

 

A system which transposed or lowered the entire frequency range was ultimately discontinued and is no longer used commercially.
从前的移频技术降低、转移所有的声音频率,这种移频方式现在已经被废止了,几乎没有再在商业上采用。

 

However another transposition system is available in competitive products.
但是,我们的竞争产品上使用了另外一种移频理念。

 

The Widex Audibility Extender shifts a selected frequency section down and mixes it with other sounds. This shift and mix approach can be beneficial, but it also results in spectral blurring and unwanted distortion. >>This feature is also only available as an option in a secondary manual program.
唯听的可听度扩展移频技术是将特定频率段的声音转移到较低频率段,并将它们混合在一起。这种转移和混合的移频方式可能会有用,但是同时它也导致了声音频谱的模糊,并制造出患者不想要的失真。并且,此项功能(移频)只能设置在第二个手动程序里。 

 

SoundRecover does neither of these things. It sets a cutoff frequency within the audible range, then compresses and shifts high frequencies without any spectral overlap. So the full range of sounds is audible and sounds below the cutoff are unaffected.
峰力的高频重塑功能则不会产生以上后患。它在患者的可听范围内设置了一个截止频率,并将更高频的声音压缩、并转移,并且不发生频率重叠现象。 这样 患者就可以听到全频率范围的声音,并且截止频率以前的声音(较低频音)没有受到影响。

 

What does SoundRecover do?

高频重塑功能的作用是什么?

Even SoundRecover was introduced last year we get ask a lot: What does SoundRecover do? Therefore we created a simple picture to visualize what SR is doing.
尽管高频重塑功能是在去年被推出的,但我们现在仍然收到很多问题,如,高频重塑到底是干什么的?为此,我们做了一个简单的示意图,以便为大家形象说明高频重塑功能:

 

左图为峰力的高频重塑造功能,右图为竟争产品。

 

1.You can see 4 People sitting on a sofa.

你可以看到图中的沙发上坐了4个人。


2. Then one person more is joining and wants to sit down as well.
  然后,第五个人加入,也想坐在这个沙发上。


3. Please be aware that we are talking about nonlinear frequency compression. That means below the Cut off frequency nothing happens, just everything above becomes compressed. And that’s what you can see here. Just 2 people are squeezed together to make space for the fifth person.
峰力的高频重塑功能使有的是非线性频率压缩。这意味着截止频率以下(截止频率前)的声音不会收到任何影响,仅截止频率以上的声音(高频区域)被压缩。这也是我们在图中所看到的,图中另边的两人挤了挤,让第五个人坐下,而第一、二个人几乎没受到任何影响。


4. What would happen in case of transposition? The fifth person would sit on the other two persons.
但如果使用传统的移频技术会发生什么样的情况呢?那就是,第5个人就得坐在右边两个人的大腿上。

The /S/ sound is located in the high frequencies. The vowel /A/ is low frequency and can be seen clearly. In the second spectrogram, /ASA/, as perceived by someone with a high frequency hearing loss, shows the residual energy of the /S/ sound which is now inaudible. The low frequency vowels are not affected by a high frequency hearing loss and are still audible. When the /ASA/ is amplified with SoundRecover, non-linear frequency compression, the high frequency components are compressed to an audible range and the global relations between different frequency components are preserved.
/s/音的绝大多数能量位于高频区域。元音/A/在低频区,现在,使用高频重塑(非线性频率压缩)功能以后,患者可以听到/s/的声音,而低频区域的元音也没有受到影响,仍然可以听到的。 高频区域原先听不到的声音,如/S/音,被压缩并转移到了可以听到的区域,而且各个频率之间的相对关系仍然保持不变。

 

Regardless of the amount of compression applied, the non-linear frequency compressed output signals do not overlap the low frequency range and the global relations between different components remain intact.
无论压缩比如何改变,经非线性频率压缩过的信号输出都不会和低频区域的输出重合,且各个不同频率之间的相对关系依然保持完整。

 

The graph below shows the gain of a hearing instrument when non-linear frequency compression applied at different settings. The green line shows the original signal. Moving towards the left are different compression settings with the strongest setting (dark blue line) being 1500 Hz cut-off frequency with a compression ration of 4:1.
下面的这张图反应的是当非线性频率压缩(高频重塑)在不同设置时助听器的增益情况。图中绿色的线是代表原始声信号的增益。从绿色的线依次向左看,高频重塑的强度设置的越来越强,最左边的那条深蓝色的线是最强的设置状态,即截止频率1500赫兹处的压缩比为41.


This is similar to what you will see in a test box with non-linear frequency compression turned on. Although it shows that there is no high frequency gain, this is incorrect as the high frequencies have been compressed to a lower frequency.
这与您在助听器检测箱中看到的检测结果相似(当高频重塑功能开启时)。虽然,这看似表示高频区域没有增益了,其实这种理解是不正确的,因为,高频区域的声音信号已经被压缩并转移到低频区域。


Background information:  背景信息
All pictures derived from MACarena “vcv” speech tests以上所有的图片均来源于MACarena “vcv” 的言语测试
On the spectrograms:在言语频谱图中(持续周期为1Vcv测试周期)
x = time (duration of 1 vcv item)横轴=时程轴
y = frequency from 0 to 6000 Hz纵轴是频率轴(0-6000赫兹)
MACarena Speech Tests is a software program designed to present speech stimuli and record subject responses. It was developed by Dr. Waikong Lai from the University of Zurich. Copyright, USZ_ORLLEA (May 2003).
MACarena言语测试是一种软件,它用于测出言语刺激声和记录受试者的反应。该软件是被苏黎世大学的Waikong Lai博士研制开发出来的,版权,USZ_ORLLEA (May 2003). 
 

SoundRecover is about providing audibility for the full spectrum of sounds and enhancing speech intelligibility. It is an effective and proven way to restore high frequency speech and environmental sounds without undesirable artifacts or a perception of shrillness or tinniness.

高频重塑的目的是为弱人士提供全频率段声音的可听性,并搞高言语可懂度。事实证明,这是一个在不产生失真、刺耳、耳鸣的情况下重建高频言语、让聋人听到环境中的各种声音的有效途径。

 

There is no spectral overlap or mixing as non compressed sounds below the cutoff frequency are not affected.
峰力的高频重塑技术没有频率重叠或混合的现象,因此截止频率以下的声音的音质并没有受到影响。

 

The resulting expansion of audibility provides benefits for speech intelligibility and environmental sound awareness, even in challenging listening situations.
峰力的高频重塑技术为听力损失人群拓展了可听度,提高了言语可懂度,让他们即使在比较困难的聆听环境中也能听到更多的环境声。

 

It is important to remember that while many clients will spontaneously accept SoundRecover, some acclimatization is often required and should be expected. Typically, 4-6 weeks is sufficient for most clients to acclimatize.  Of course no solution is right for every single client.  For those who do not benefit from or would not prefer SoundRecover, it can easily be deactivated in iPFG with just one mouse click. However field studies indicate no negative consequences of SR, so even if benefit is not perceived, SR can remain active.


然而,我们需要记住非常重要的一点,那就是,虽然很多患者可以自发地接受高频重塑,但通常情况下高频重塑需要一定的适应时间,我们不应对此感到意外。大多数情况下患者需要4-6周的适应时间。当然每个人都存在个体差异,没有一个解决方案是适用于全体的。对那些使用高频重塑没有效果或是不喜欢高频重塑的患者来说,要在峰力独有的验配软件iPFG中将此功能关闭也非常简单,只需要点击一下即可。但是,在有关专业领域发表的研究报道中并没有发现高频重塑功能带来负面影响的案例,所以,即使患者没有感受到高频重塑功能所带来的好处,患者仍然可以开启并使用这个功能。

 

 

相关阅读: 峰力荣获2010 AIHHP“最佳供应商大奖” http://www.xmear.com/nshow.asp?tmpid=411

快速压缩和慢速压缩相结合-峰力CORE平台高级助听器:http://www.xmear.com/nshow.asp?tmpid=536

峰力再次推高了技术标杆-最新一代双耳自动立体声言语聚焦技术:http://www.xmear.com/nshow.asp?tmpid=628

 

 

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