t******g
发帖数: 17520 | 1 嗯， 那是当然， 这个niche market就是这么创造出来的
像Bose这种厂家的官网上耳机的数据一个有用的都没有
至少要有个 Frequency response， sensitivity ， driver的impedence
吧
有一句
Active equalization electronically tunes the headphones' frequency response,
enabling outstanding audio performance.
这不是直接搞渲染让你觉得舒服， 和保真背道而驰， LOL |
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t******g
发帖数: 17520 | 2 我学工的， 不认真要死人的（应该没那么严重）， LOL
还是你的意思我要你说明和大牛什么关系？ 这个当然要认真
TMD
sony 一款耳机的 spec
Driver Size : 16.0 mm
Impedance : 16 Ohms
Headphone Type : Dynamic, In-Ear
Cord Length : 5.25 ft
Frequency Response : 3-28kHz
Power Handling : 500mW
Weight : .25 oz
Plug Type : Gold, Stereo Unimatch plug 1/4" and 1/8"
Magnet Type : Neodymium
Sensitivity : 108 dB/mW
这东西customer谁看啊
--你不看不等于别人不看。 相同价格或者更便宜， 一个plug 是gold platted
bose 可能是铜的， 可能影响比较小， 但是成本就不同了 |
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k**0
发帖数: 19737 | 3 sony xba4 的Frequency response range很广， 而shure 535/ 海森IE80的Frequency
response range比数据差很多， 但是音质535/IE80好， 所以看纸面数据不能完全作为
凭据，
明白了没？
这是你的原帖
-----------------------------------------------------------
发信人: tuziwang (a.k.a. 毛兔, 兔子, Kaiju), 信区: TVGame
标 题: Re: 索尼断肢求生
发信站: BBS 未名空间站 (Fri Feb 7 13:19:58 2014, 美东)
嗯， 那是当然， 这个niche market就是这么创造出来的
像Bose这种厂家的官网上耳机的数据一个有用的都没有
至少要有个 Frequency response， sensitivity ， driver的impedence
吧
有一句
Active equalization electronically tunes the headphones' frequency re... 阅读全帖 |
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g***e
发帖数: 14217 | 4 跟草神说的一样，问遍了洛杉矶的饲料店都没有corn gluten.后来在Lowes买了
monterey weed impede, 成分是oryzalin (surflan).16oz的小桶，但是40%高浓度，估
计能用很久。 |
|
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b*s
发帖数: 82482 | 6 So? Hit rate is never a concern for machine guns, as long as it fires, it is
an enough deterrent to impede the enemy's movement. The hit rate can be so
low for a machine gunner, but he did his job by just firing at the right
direction and location.
A rifleman shoots to kill. So naturally his rate is higher than the machine
gunner, but that doesn't mean the machine gunner is a lousy one...
second-
not
more
hit
Guess you don't understand the importance of adjusting your aim based on
your previous... 阅读全帖 |
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b*s
发帖数: 82482 | 7 其实日本刀的刀型，远远强于直刀。
Cutting Ability - This is the blade's capacity to deliver powerful shearing
and cleaving edge blows. Despite it being the fundamental purpose of most
swords, this category is still challenging to determine. The katana, with
its living tradition of practice, is well known for demonstrating its
cutting power. Its single, hardened, wedge-like edge has long been shown to
be capable of extraordinary sharpness. The longsword, which has not been
practiced or studied for centuries, has ... 阅读全帖 |
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k******9
发帖数: 878 | 9 如果买BMB CSX-550 400W 8" 3-Way Speaker System ，这是它的参数：是不是这种
400W的需要特别的receiver, 那和Onkyo TX-NR626 receiver能搭配吗？
Type: 3-Way, 3-Speaker Bass Reflex System
Speaker: One 8" Woofer each, Two 3" Tweeters each
Max Power: 400W
Sensitivity: 90dB/W/m
Impedance: 8 ohms
Dimensions: 18.27"(L) x 10.12"(W) x 10.55"(D)
Weight: 19.842 lbs each
感激不尽！！！！！！ |
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g*******a
发帖数: 1383 | 10 most of mics are lo-z, but there are hi-z mics
this is very very complicated stuff. bascially
lo-z (z is impedence) mic can be connected to
a lo-z mixer directly using an XLR cable. but
if you hook it up to your guitar amp it won't
sound right because guitar amp needs hi-z input,
so you can buy a lo-z>hi-z transformer to make
it work that way. or you can buy a hi-z mic
to connect directly. the problem w/ that is
guitar amp doesn't use XLR (in case you wonder
where this came from, X - eXternal, |
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c***r
发帖数: 1570 | 11 rp90是可以直接接调音台的，DI可有可无。
但是据说再接一个DI音色会更好些，失真开大了以后被动嚣叫会更少些，接DI在合成效
果器后面不是为了gain和impedence匹配的，只是为了更稳定，噪音小。合成里面noise
gate 我顶多开30%，多了感觉没动态，solo不爽。
主要是本来打算买preamp的，看到了这款又能作DI用，就上来问问。
line6 x3不太清楚是什么。我学习了一下，我的rage 158箱子还有个mic接口应该是可
以接preamp出来的话筒音，然后input接效果器出来的大三芯线，希望能简化到一个吉
他音箱弹唱。 |
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f****g
发帖数: 379 | 12 完全有这种可能。但是要注意好的标准是不一样的。
如果你要箱体的感觉，要多点air，要warm，还是要用外部麦。
内置的拾音器怎么样总是有点电味。
好了，我终于找到了你琴和录音机的manual。问题是这样的：
你的琴输出的是instrument level的信号，也就是说是很小的，一般他们叫-20dBv信号。
你的录音机的line in
Input impedance 23 kOhm
Input level (nominal/maximum) –10 dBV/ +6 dBV
就是说它期望看到的信号是–10 dBV/ +6 dBV。
简单说就是琴的信号还不够它塞牙缝的。这样情况下信号微弱细节的部分容易损失掉。
一般来说琴和line in之间需要一个buffer或者DI box.
你可以google一下。应该能解决你的问题。 |
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g**********g
发帖数: 18118 | 13 Next Sunday December 8 2013 will be a FLICKR BLACK DAY in order to protest
against the upcoming change that everyone will soon be forced to accept (
unless we leave ...)
If you wish to join the protest against this awful new Flickr layout ,you
can
Download this image from
-- here www.flickr.com/photos/anujnair/11166980463/
--or here www.flickr.com/photos/110293295@N04/11147629795/
Thank you Anuj Nair
-- You may also download from my own stream because I've applied a Creative
Commons license to i... 阅读全帖 |
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b********s
发帖数: 1118 | 14 【 以下文字转载自 CanadaNews 讨论区 】
发信人: blueforpus (Little Bo), 信区: CanadaNews
标 题: 冰封池塘 鱼儿被憋坏了
发信站: BBS 未名空间站 (Mon May 21 20:48:15 2012, 美东)
As the long Russian winter drags on, fish in the ponds of St. Petersburg
become increasingly desperate for oxygen, clustering in vast thrashing
masses at shrinking holes in the ice. Not only does ice block oxygen that
could be diffused into the water from the air, but it also impedes sunlight
from reaching oxygen-generating plants and algae in the water |
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f******s
发帖数: 344 | 15 最近开始学习耳机知识，想买耳机煲着玩。。。
又米有那么多钱，想找到好deal再买。求推荐deal网址啥的。。。
最近看上了Sennheiser HD650. Impedance到了300 Ohm 得用耳放，对这个又不熟悉。
。。 |
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p********3
发帖数: 5750 | 16 再让你长长见识：大家看和文献3-6相关的那句话，专门提出了中药的肾脏毒性问题，表明实际上的肾脏毒性比原先预期想象的还要普遍。
大家没有忘记在对Herb Medicine管制更严格的欧盟对中药 Ban了吧。 我上篇文献里面说了欧盟对Herb的管理对美国严格， 谈得比较细，有兴趣的可以仔细阅读。
Author
Marc E De Broe, MD, PhD Section Editor
Gary C Curhan, MD, ScD Deputy Editor
John P Forman, MD, MSc
Last literature review version 19.2: May 2011 | This topic last updated:
June 15, 2010
INTRODUCTION — In 1991, physicians in Belgium noted an increasing number of
women who presented with acute, often near end-stage renal disease
following expo... 阅读全帖 |
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w*l
发帖数: 2550 | 17 方舟子打甘任远是假打。
先攻击别人的身份，这个虽然不太高尚，但这里不作更多评价。
其次，方舟子对美国国会大厦有关政治示威的理解是不正确的：
甘任远的反驳方舟子上一篇文章的文章写的：
“ 方舟子又说: “不仅是美国国会大厦，像美国最高法院、美国国会图书馆，也
都是禁止政治示威的，有关法律条文的措辞都一模一样.” 关于禁止在国会大厦内部示
威的法律, 是国会专门的立法,叫做STATUATE. 美国国会警察委员会的具体规定
REGULATIONS和相应的解释 INTERPRETATIONS. 都是针对国会建筑物的具体情况作出的.
方舟子说的 “一模一样”是指国会的立法呢, 还是指那些具体规定和解释? ”
甘文举了下面的判例：
“As the seat of the legislative branch of the federal government, the
inside of the Capitol might well be considered to be the heart of the nation
’s expressive activity and exchange o... 阅读全帖 |
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e**y
发帖数: 784 | 19 最近风声紧啊。感觉不是什么大事，两边收钱的事，几乎所有中国老板都干过吧？
深圳先进技术研究院 和 上海联影 估计要出名了。。
听说联影在中国 把西门子在中国的人连窝挖走了，做他们的班底，知情的人说说？
Chinese MRI researchers arrested on conspiracy, bribery charges
By Wayne Forrest, AuntMinnie.com staff writer
May 21, 2013
Federal authorities have arrested Chinese researchers who worked on MRI
technology at NYU Langone Medical Center for allegedly acquiring research
money from the U.S. government and then sharing technological information
with a Chinese company and government-sponsored research... 阅读全帖 |
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l****u
发帖数: 2778 | 20 哇，好贴阿
我学了好多英语单词阿
UndeniableTruth 5ptsFeatured
29 minutes ago.@Carl Silagyi
Had the SUV pulled off the side of the road the Bikers would have still
damaged his vehicle as they were trying to extort money from him. That's
what these guys do, they single out expensive vehicles and get them to stop
when the stage an "accident" by slowing back into them to bump them. Cruz
wasn't turned around looking for his buddies, he was turned around to judge
the distance to the SUV to make sure his "accident" ... 阅读全帖 |
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i*****a
发帖数: 7272 | 21 What is Corruption?
Corruption is when either power or position is misused for personal profit,
and can take place in both private and public sector. Examples of corruption
include bribery, coercion, nepotism, bid-rigging and electoral fraud.
How does Corruption affect us?
Additionally, corruption causes public funds – which could have been used
to develop infrastructure such as roads, improve public institutions such as
schools and hospitals, and improve the delivery of necessities such as
ligh... 阅读全帖 |
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l**********p
发帖数: 272 | 22 【 以下文字转载自 Physics 讨论区 】
发信人: littleshrimp (芹菜), 信区: Physics
标 题: ZT funny post: Heaviest Element Yet Known to Science: (Gv)
发信站: BBS 未名空间站 (Fri Apr 27 14:10:37 2012, 美东)
Lawrence Livermore Laboratories has discovered the heaviest element yet
known to science. The new element, Governmentium (Gv) , has one neutron, 25
assistant neutrons, 88 deputy neutrons, and 198 assistant deputy neutrons,
giving it an atomic mass of 312.
These 312 particles are held together by forces called morons , which are... 阅读全帖 |
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M******n
发帖数: 43051 | 23 我直接贴全文好了，我觉得他的邮箱也值得吐槽
1.
User Feedback Shapes Internet Progress
In his Policy Forum “Can we reinvent the Internet?” (24 July, p. 396), V.
Mayer-Sch?nberger concludes that current connectedness of the Internet
impedes software coders' ability to innovate. I disagree.
Whether for commercial or for open-source purposes, software coders'
motivation and inspiration for innovation originate primarily from user
feedback, including expectations, demands, and even complaints. Frequent
software upgrades r... 阅读全帖 |
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z*****n
发帖数: 7639 | 24 几十块的不好说。体制测量时根据Bioelectrical impedance analysis，
误差肯定会有，跟空腹/饱腹，测试前
是否运动都有关系。不管怎样，都比BMI靠谱。 |
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b*****d
发帖数: 61690 | 25 【 以下文字转载自 USANews 讨论区 】
发信人: brihand (brihand), 信区: USANews
标 题: 参议院的bill太牛了：暂停遣返非法移民
发信站: BBS 未名空间站 (Thu Feb 15 12:40:25 2018, 美东)
The White House said it “would undermine the safety and security of
American families and impede economic growth for American workers” and
result in “a flood of new illegal immigration in the coming months.”
That’s because the bipartisan Senate plan would temporarily suspend
deportations of people who have not been convicted of serious crimes.
The White House’s sta... 阅读全帖 |
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c*******r
发帖数: 527 | 26 It is a matter of attitude. I know somebody is onto her 5th marriage and
still feel confident. People should not let others control their fates.
Those insulting attitudes only feel hurtful or impedes your happiness when
you let them. |
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d******1
发帖数: 634 | 27 门当户对 - agree.
In physics, there is something called phase match, impedance match. |
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x****u
发帖数: 12955 | 28
I don't know why people would just summarily dismiss that idea just because
they themselves can't believe it. Just remember you never really worked
with horses, probably never rode horses, and certainly never entered into
combat with horses.
US Army General William Hazen (1830-1887), a veteran of US civil war and
Indian war, had this to say when comparing infantry and cavalry:
" In the matter of comparative cost of cavalry and infantry as proportioned
usefulness the extra cost of the former wh... 阅读全帖 |
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x****u
发帖数: 12955 | 29
I don't know why people would just summarily dismiss that idea just because
they themselves can't believe it. Just remember you never really worked
with horses, probably never rode horses, and certainly never entered into
combat with horses.
US Army General William Hazen (1830-1887), a veteran of US civil war and
Indian war, had this to say when comparing infantry and cavalry:
" In the matter of comparative cost of cavalry and infantry as proportioned
usefulness the extra cost of the former wh... 阅读全帖 |
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D*****r
发帖数: 6791 | 30 31 But now, near the beginning of the steep,
32 a leopard light and swift
33 and covered with a spotted pelt
34 refused to back away from me
35 but so impeded, barred the way,
36 that many times I turned to go back down.
37 It was the hour of morning,
38 when the sun mounts with those stars
39 that shone with it when God's own love
40 first set in motion those fair things,
41 so that, despite that beast with gaudy fur,
42 I still could ... 阅读全帖 |
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l**********t
发帖数: 5754 | 31
7. To them who by patient continuance in well-doing seek for glory and
honour and immortality, eternal life;
"To them indeed, who by perseverance, etc.; literally, patience; by which
word something more is expressed. For it is perseverance, when one is not
wearied in constantly doing good; but patience also is required in the
saints, by which they may continue firm, though oppressed with various
trials. For Satan suffers them not by a free course to come to the Lord; but
he strives by numberles... 阅读全帖 |
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f*****h
发帖数: 228 | 32 I will directly quote then:
"The mechanisms of reproductive isolation or hybridization barriers are a
collection of mechanisms, behaviors and physiological processes that prevent
the members of two different species that cross or mate from producing
offspring, or which ensure that any offspring that may be produced is not
fertile. These barriers maintain the integrity of a species over time,
reducing or directly impeding gene flow between individuals of different
species, allowing the conservati... 阅读全帖 |
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s*********t
发帖数: 4253 | 33 "The mechanisms of reproductive isolation or hybridization barriers are a
collection of mechanisms, behaviors and physiological processes that
preventthe members of two different species that cross or mate from
producing offspring, or which ensure that any offspring that may be produced
is not fertile. These barriers maintain the integrity of a species over
time, reducing or directly impeding gene flow between individuals of
different
species, allowing the conservation of each species’ character... 阅读全帖 |
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s*********t
发帖数: 4253 | 34 "The mechanisms of reproductive isolation or hybridization barriers are a
collection of mechanisms, behaviors and physiological processes that
preventthe members of two different species that cross or mate from
producing offspring, or which ensure that any offspring that may be produced
is not fertile. These barriers maintain the integrity of a species over
time, reducing or directly impeding gene flow between individuals of
different
species, allowing the conservation of each species’ character... 阅读全帖 |
|
s*********t
发帖数: 4253 | 35 "The mechanisms of reproductive isolation or hybridization barriers are a
collection of mechanisms, behaviors and physiological processes that
preventthe members of two different species that cross or mate from
producing offspring, or which ensure that any offspring that may be produced
is not fertile. These barriers maintain the integrity of a species over
time, reducing or directly impeding gene flow between individuals of
different
species, allowing the conservation of each species’ character... 阅读全帖 |
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T*****n
发帖数: 2456 | 36 Contraception
Historically, Christians always have condemned contraceptive sex. The two
forms mentioned in the Bible, and sterilization, are
condemned without exception (Gen. 38:9-10, Deut. 23:1). The Fathers of the
Church recognized that in natural law the purpose of sexual intercourse is
procreation; contraceptive sex, which deliberately blocks that natural
purpose, is therefore a violation of natural law.
Every church in Christendom condemned contraception until 1930, whe... 阅读全帖 |
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s*******1
发帖数: 111 | 37 上法庭， 主动承认错误，再请求法官的mercy. 如果你的历史清白，很多时候法官会减
轻惩罚， 罚款了事。没有点和纪录。 至少不会涨保险。至少在Michigan 是这样。 我
有两次超速15迈，都转成 Impeding traffic.交同样的罚款而已。 |
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G********e
发帖数: 258 | 39 Thanks for your nice comments. Actually, I need to to be passed for my resume
no matter what kind of score it is. I hardly have time to prepare it. If I
could have another chance, I would spend more time on it.
But I felt in that afternoon I was lucky for not being impedded by the
difficult problems in Themodynamics listed in Lindeburge's review, which
totally destroyed my confidence in that part.
enviroment.
the |
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c******o
发帖数: 1184 | 40 如果要上 impedance 比较高的1/4inch耳机还是必须的 |
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d*b
发帖数: 21830 | 41 balun match impedance,不是match gain |
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d*b
发帖数: 21830 | 42 balun match impedance,不是match gain |
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r*****s
发帖数: 985 | 43 i'm not convinced either.
it's a little bit apple-vs-orange comparision.
even the perf boost can be case by case,
under the conditions that you have good sql/db engineers.
if you start to worry about "orm impedance mismatch",
your app is fairly complicated,
and you need a very good sql/db engineer anyway,
with or without hibernate/*batis.
ibatis |
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k**********g
发帖数: 989 | 44
It is not that performance no longer matters.
It is that performance techniques need to be composable (mixed) with other
initiatives, such as horizontal scaling, etc.
That is, (1) it should not impede the use of other techniques; (2) if
performance techniques result in X percent increase in performance, one
should expect the same X percent when used with with horizontal scaling;
otherwise its worth is less whenever used in horizontal scaling. |
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t*******e
发帖数: 141 | 45 真正的Unpaid实习当然有。Intern跟着mentor学习，跟所学专业极度相关的训练。但
不可否认，也有的打着Unpaid实习的旗号，利用免费劳动力。New York Times 几个月前就报道过电影界不当使用unpaid intern 引发lawsuit的事件。
http://www.dol.gov/whd/regs/compliance/whdfs71.htm
The Test For Unpaid Interns
The following six criteria must be applied when making this determination:
The internship, even though it includes actual operation of the facilities of the employer, is similar to training which would be given in an educational environment;
The internship experience is for the... 阅读全帖 |
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w*********s
发帖数: 2136 | 46 Why Almost Everything You Hear About Medicine Is Wrong
http://www.newsweek.com/2011/01/23/why-almost-everything-you-he
If you follow the news about health research, you risk whiplash. First
garlic lowers bad cholesterol, then—after more study—it doesn’t. Hormone
replacement reduces the risk of heart disease in postmenopausal women, until
a huge study finds that it doesn’t (and that it raises the risk of breast
cancer to boot). Eating a big breakfast cuts your total daily calories, or
not—as a st... 阅读全帖 |
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a********k
发帖数: 2273 | 47 花了一个小时，深深的鄙视一下自己的无聊行径！！
125 蔡亮 男 1980年11月 复旦大学 生命
科学 2007年12月毕业于[美国]北卡大学 [美国]加州大学旧金山分校 博士后
Cai L, Mostov K. Polarity is destiny. Cell. 2009 Nov 13;139(4):660-2. PubMed
PMID: 19914162; PubMed Central PMCID: PMC2900917.
Cai L, Makhov AM, Schafer DA, Bear JE. Coronin 1B antagonizes cortactin and
remodels Arp2/3-containing actin branches in lamellipodia. Cell. 2008 Sep
5;134(5):828-42. PubMed PMID: 18775315; PubMed Central PMCID: PMC2570342.
Cai L, Makhov AM, Bear JE. F-actin... 阅读全帖 |
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