讨论: zwicker的Psychoacoustics的理解
最近在看zwicker的Psychoacoustics，他在介绍人耳结构的时候好像说外耳道大约是2cm长，和4000HZ时的1/4波长一致，所以人耳在4000HZ附近很敏感，对不对啊？我觉得有点问题啊。还有谁看了，讨论一下。 我没看过这个，但是我通过实验130dB的1000Hz、2000Hz、3000Hz、4000Hz和5000Hz的纯音发现，我最受不了4000Hz的，都想把耳机摘了。看来人耳（我的）对4000Hz的确很敏感哦！不知其他人怎么样？ 我也看了这一段，“外耳道大约是2cm长，和4000HZ时的1/4波长一致，所以人耳在4000HZ附近很敏感”，这个因果关系我没弄明白。文中说外耳道是起放大作用，2cm长度对4000Hz放大作用最大。听阈曲线是3-8kHz最为敏感。2楼的回答比较有说服力。 那1/4波长会很敏感，1/8波长呢？还是到1/4波长为止了，再1/2就不行了？ 根据物理现象，当波长为其长度的四倍时能发生最好的共鸣。外耳道平均长度为2.5cm，则发生最好共鸣的波长应为10cm，根据实验结果，波长10cm时的频率为3000～4000Hz，使外耳道共振效应得到的增益约为10dB。-----（来自网络） 谢谢楼上师兄的讲解！~~~~~~~~~ 请问这本zwicker的Psychoacoustics在哪里可以找到或购买呢？谢谢 哪位同仁可以传一份电子版给我吗？多谢。我的邮箱chidan_163@163.com 原帖由 hyl2323 于 2008-1-14 11:50 发表 http://www.chinavib.com/forum/images/common/back.gif根据物理现象，当波长为其长度的四倍时能发生最好的共鸣。外耳道平均长度为2.5cm，则发生最好共鸣的波长应为10cm，根据实验结果，波长10cm时的频率为3000～4000Hz，使外耳道共振效应得到的增益约为10dB。-----（来自 ...
确实是正解啊，呵呵，但是为啥我对1000Hz的纯音就很受不了呢
请问nobodyip兄的邮箱？
楼上的nobodyip兄，咱们一个学校的，能不能把你的邮箱给我说一下？以后可以交流一下 Psychoacoustics: Facts and Models, 3rd EditionAuthors Hugo Fastl and Eberhard Zwicker
Publisher Springer; 3rd edition
Pub Year 2006
ISBN ISBN-10: 3540231595
ISBN-13: 978-3540231592
pages 462
Description Product Description
Psychoacoustics – Facts and Models offers a unique, comprehensive summary of information describing the processing of sound by the human hearing system. It includes quantitative relations between sound stimuli and auditory perception in terms of hearing sensations, for which quantitative models are given, as well as an unequalled collection of data on the human hearing system as a receiver of acoustic information. In addition, many examples of the practical application of the results of basic research in fields such as noise control, audiology, or sound quality engineering are detailed. The third edition includes an additional chapter on audio-visual interactions and applications, plus more on applications throughout. Acoustic demonstrations on a CD included with this edition further illustrate and amplify basic and applied psychoacoustic phenomena. Reviews of previous editions have characterized it as "an essential source of psychoacoustic knowledge," "a major landmark ," and a book that "without doubt will have a long-lasting effect on the standing and future evolution of this scientific domain."
About the Author
Hugo Fastl is Professor of Technical Acoustics in the Faculty of Electrical Engineering and Information Technology at the Technical University München, Germany. He graduated 1969 in Music from the Academy of Music München, and 1970, 1974, and 1981 he earned at the Technical University München the degrees of Dipl.-Ing., Dr.-Ing., and Dr.-Ing. habil., respectively. His research interests are basic psychoacoustics and its applications in fields like audio-communication, noise control, sound quality design, audiology, or music. In 1987 he was elected Guest Professor of Osaka University, Japan, and in 1990 he became a Fellow of the Acoustical Society of America. He is head of the committee "Auditory Acoustics" of the Society for Information Technology (ITG), and with the German Acoustical Society (DEGA) he is member of the Board of Directors, and Treasurer. In 1983 he won the Award of the Society for Information Technology (ITG), in 1991 the Research Award in Audiology of the Forschungsgemeinschaft Deutscher H?rger?te-Akustiker, in 1998 the Research Award of the Japan Society for the Promotion of Science (JSPS), and in 2003 the Rayleigh Medal of the Institute of Acoustics (UK).
Eberhard Zwicker was one of the worlds top authorities in psychoacoustics. In his labs in Stuttgart and München he educated scientists and engineers who hold now key positions in basics and applications of (psycho-)acoustics. From his many honors, the Silver Medal of the Acoustical Society of America and the degree of Honorary Member of the Audio Engineering Society are among the more outstanding
http://item.taobao.com/item.htm?id=6859885831 我这里倒是有原文，可惜传不上去。 本帖最后由 jinfengshi_2005 于 2010-8-30 16:53 编辑
根据物理现象，当波长为其长度的四倍时能发生最好的共鸣。外耳道平均长度为2.5cm，则发生最好共鸣的波长应为 ...
hyl2323 发表于 2008-1-14 11:50 http://www.chinavib.com/static/image/common/back.gif
其实关于这段话，原文是这样的，因为人的耳道可以看做一端闭口，一端开口的管道，当耳道长度是声音波长的1/4时将发生共振，而我们人耳的长度为25mm,所以共振频率为：
因为：Lamd(声音波长)*f(声音频率）=C（声音速度），L(耳道长度）=波长(Lamd)/4；
所以L(耳道长度）=C(声音速度)/(4*f(声音共振频率));
所以 f(resonance)=(340m/s)/(4*0.025m)=3.4KHz
那1/4波长会很敏感，1/8波长呢？还是到1/4波长为止了，再1/2就不行了？
nobodyip 发表于 2008-1-14 09:29 http://www.chinavib.com/static/image/common/back.gif================================================================
关于你这个问题，你应该去看管道声学，对于一端闭口，一端开口的管子，其声音的共振频率是有很多阶的。
JustI want to have one point to add according to the 13 floor's suggestion, and about the length of the ear canal, maybe somebody's ear canal is 25mm, and others' maybe 20mm, so the resonanced frequency maybe 3400-4200Hz.
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