G****1
发帖数: 825 | 1 sorry， 我不知道怎么转换sone 和 decibel
他电话里告诉我是5 sones,
我自己在broan的catalog里查了下：
对于 exterior blower：Sone levels are typically half of comparable CFM
internal blowers.
我没有找到相应的900cfm的，找到了600和1200的：
E6430SS：Sones at high speed for Internal 600–13.5 max
E6448TSS：Sones at high speed for Internal 1200–14.5 max
我取了中间值：14 sones 再除以2：7 sones，比他告诉我的高了点。
我原来以为是乘40，所以我说200分贝，现在看来不是乘40，那我也不知道怎么算了 |
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y***j
发帖数: 11235 | 2 Bosch Ascenta 24-in 49-Decibel Built-In Dishwasher with Stainless Steel Tub
(Stainless Steel) ENERGY STAR |
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j****2
发帖数: 759 | 3 排名 ID 帖数 忠诚度(排名) 引用数(排名) 引用率(排名)
1 epona 238 88.1% (12) 141 (2) 0.59 (15)
2 ms12 191 94.6% (9) 101 (3) 0.53 (19)
3 hypnos 141 73.1% (21) 68 (4) 0.48 (25)
4 yudeli 132 94.3% (10) 147 (1) 1.11 (1)
5 john12 130 99.2% (8) 61 (6) 0.47 (27)
6 weever 107 16.7% (48) 67 (5) 0.63 (14)
7 conanzz 61 88.4% (11) 27 (11) 0.44 (31)
8 lisalin 59 55.7% (31) 35 (7) 0.59 (15)
9 O... 阅读全帖 |
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h****s
发帖数: 16779 | 4 直接订，aa，1点当1.6美分。
转点，ba，sq。
[在 Decibel (dB) 的大作中提到：]
：aa ua？
：
：........... |
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D*****l
发帖数: 357 | 5 $75的多少羊毛。
【 以下文字转载自 Investment 讨论区 】
发信人: Decibel (dB), 信区: Investment
标 题: IRA rollover
发信站: BBS 未名空间站 (Tue Jul 14 12:33:29 2015, 美东)
我想把在capital one 的traditional IRA rollover到fidelity的401k。
capital one 告诉我direct rollover收费75。因为钱从他们那里转出来。支票直接给
fidelity。没有hold。
或者支票给我，hold 20%（标准?）扣$5手续费。
这正常吗？我想direct rollover，如果被收费就有点恶心了。 |
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g***i
发帖数: 1972 | 6 上rdu机场搜decibel map，除了分布图还要看航线图，highcroft reserve不幸就是降
落航道正下方。你可以选降落航线，然后输入房子地址就知道附近起飞降落的影响了。
★ 发自iPhone App: ChineseWeb 7.7 |
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n**********o
发帖数: 713 | 7 只能说你跟这样的邻居住比较倒霉。我刚来美国的时候，邻居是个乐队，每天排练4个
小时，房盖恨不得都掀开了，跺脚敲门都没用，听不见，警察来也是走个形势，不管事
的。
你要用智能手机，就下载一个Decibel 10TH软件，可以记录你家的噪声，同时你用一个
录像机，连图像带声音都录下来取证。 |
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F****n
发帖数: 438 | 8 你回贴前，为什么不google一下呢？
我们只是在ABC总部前抗议，不必谨小慎微的。
希望在城里工作的同学们午饭时间都过来支持。
http://www.nyclu.org/content/know-your-rights-demonstrating-new
Know Your Rights: Demonstrating in New York City
New Yorkers have the right to engage in peaceful, protest activity on public
sidewalks, in public parks and on public streets in New York City. This
includes the right to distribute handbills or leaflets; the right to hold
press conferences, demonstrations and rallies; and the right to march on
public sidewalks and in pu... 阅读全帖 |
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p***y
发帖数: 18037 | 9 dB= decibel。通常耳塞包装上都有一个dB NRR (Noise Reduction Rating)的数字，代
表可以阻挡声音的程度。
中国人的药店也许有，但是有没有那样多选择我不确定，可以先去看看。 |
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j***w
发帖数: 489 | 10 You can buy a sound pressure level measuring tool to measure the decibel
level. |
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m********e
发帖数: 4403 | 11 Spokane Interstate Fair Spokane
September 7th to 16th
www.spokanecounty.org/fair/sif/
Western Washington Fair (Puyallup Fair) Puyallup
September 7th to 23rd
www.thefair.com/
Washington State 4-H Fair Puyallup
September 7th to 23rd
www.4h.wsu.edu/statefair/index.htm
Puyallup Fair Puyallup
September 7th to 23rd
www.thefair.com/
Odessa Deutschesfest Odessa
September 14th to 16th
www.deutschesfest.com
Taste of the Harvest Wenatchee
September 15th
www.wendowntown.org
Walla Walla Quilt Festival Walla ... 阅读全帖 |
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d**y
发帖数: 18174 | 12 tone应该是rising/falling pitch的意思。搜到下面这段。根据这段说法，人感觉到的
pitch升降由频率和声强共同决定
Effect of Loudness Changes on Perceived Pitch
A high pitch (>2kHz) will be perceived to be getting higher if its loudness
is increased, whereas a low pitch (<2kHz) will be perceived to be going
lower with increased loudness. Sometimes called "Stevens's rule" after an
early investigator, this psychoacoustic effect has been extensively
investigated.
With an increase of sound intensity from 60 to 90 decibels, Terhardt found
that t... 阅读全帖 |
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j***a
发帖数: 10844 | 15 那就是你了，第一首曲子里包含了7个独奏，还有一个ppmm呢。最后一首是小号协奏曲，也就是小号独奏！
晚上见！
By the way, here are some jokes about the trumpet player
Enjoy!
*********
Trumpet Jokes
How many trumpets does it take to change a light bulb?
Five. One to handle the bulb and four to tell him how much better they could've done it.
--------------------------------------------------------------------------------
What's the difference between a trumpet player and the rear end of a horse?
I don't know either.
-----------------------------------... 阅读全帖 |
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B******1
发帖数: 9094 | 16 Good call. I found another post below:
Following the directions on each package, the team mounted the devices onto
a car's front bumper. Using a road closed to the public, they drove the car
at speeds ranging from 30 to 45 miles per hour while recording sound and
data.
"We tested them strictly from an acoustical point of view," explains
Scheifele. He found that the whistles typically produce a signal either at a
frequency of 3 kilohertz (kHz) or 12 kHz. Both, as it turns out, are
problematic.
Th... 阅读全帖 |
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i*********r
发帖数: 5101 | 17 Tennis great and New Yorker John McEnroe has gone to so many Knicks games in
his life he long ago lost count. He was at Madison Square Garden with his
12-year-old daughter for that Lakers game.
"It had to be one of the top five of all time as far as the excitement,"
said McEnroe, who was in Times Square on Wednesday talking about playing
tennis at the Garden in November in the PowerShares Series. "My daughter was
like, 'I love Lin,' and she doesn't really follow the team. It was so
amazing to be... 阅读全帖 |
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P*******e
发帖数: 39399 | 19 131.9 to 136.6 太狠了
而且decibel 是logarithmic 5分贝差好多了。。。 |
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R*3
发帖数: 11814 | 20 Fans in Kansas City are trying to drown out Seattle's world record for
stadium crowd noise set last month by Seahawks fans.
Fans there will attempt their own record Sunday at Arrowhead Stadium when
the Chiefs take on the Oakland Raiders.
Arrowhead was known for years as the NFL's loudest stadium. One of the
organizers, Ty Rowton, says they want the title back.
"We weren't going to roll over like a dog. This is our title and we're going
to bring it on Sunday and see if we can't challenge you for ... 阅读全帖 |
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f*********n
发帖数: 11154 | 21 .22LR的平均噪音值是134 decibel
.223, 55GR. Commercial load 18" barrel, 155.5dB
对耳朵的伤害可不是一般的大。 |
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b*****e
发帖数: 5133 | 23 回归正题吧，美国几大消音器厂商(AAC, Surefire, Gem-Tech等)的网站上去看一下吧
，或者随便狗一下就知道了(keywords: suppressor, decibel ...)
制式步枪(和这次凶犯用的步枪发射相似子弹)用了消音器，还可以是130分贝以上的巨
响，但不至于造成或者较难造成永久听力损害。
看电影电视了解枪支简直就是害死人。 |
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B*******l
发帖数: 42 | 24 Many are now focus on marathons and ultras. 5K too can be a nice
distraction.
This past Sunday was my third year in a row running the same 5K. It
was rainy but not too cold. The competitors were ferocious. The top
finisher gets done with a respectable 14.xx. The route was through the
street of Washington Height, a welcome change from the loops of Central
Park. The hills are not as steep but the spectators are at typical NYC
level decibel. There was live music playing along the route,... 阅读全帖 |
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h******g
发帖数: 11250 | 26 SNR的定义好像有点问题
* Signal-to-noise ratio (SNR) defines the purity of the output signal
and gives direct information about the camera’s ability to reproduce a
signal. In a logarithmic scale, it is expressed in decibels (dB), and is
obtained from the following formula:
SNR=20log10(mean/std)
SNR is independent of any gain applied to the signal since signal and noise
are equally amplified.
相机里的噪音主要应该是暗电流(DC)，随时间线性增长，而std随时间应该是sqrt增长 |
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r******x
发帖数: 5965 | 27 Dynamic range, abbreviated DR or DNR,[1] is the ratio between the largest
and smallest possible values of a changeable quantity, such as in sound and
light. It is measured as a ratio, or as a base-10 (decibel) or base-2 (
doublings, bits or stops) logarithmic value. |
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g*****n
发帖数: 21539 | 28 filezilla, chicken VNC, calibre, kindle, stanza, bbedit, colorchecker
passport
photoshop cs5, indesign cs5, LR, coda, vlc, decibel, fetch, zenstudio, vlila
, splash top, illustrator, express RIP, DVD studio pro, eyeone match, final
cut pro, logmein, macvim, neatimage, mplayer, nik suite, handbrake, XLD,
maxx dvd video converter, spotify, toast, utorrent, and more...... |
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i*********s
发帖数: 2451 | 29 Rock 'N' Roll Ain't Noise Pollution-AC/DC
http://www.youtube.com/watch?v=wr3WKl-1jNM
Hey there all you middle men
Throw away your fancy clothes
And while you're out sittin' on a fence
So get off your arse and come down here
Cause rock 'n' roll ain't no riddle man
To me it makes good good sense
Good sense yeah let's go
Heavy decibels are playing on my guitar
We got vibrations comin' up from the floor
We're just listenin' to the rock
That's givin' too much noise
Are you deaf you wanna hear some mo |
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b*****a
发帖数: 14583 | 30 decibel has a reference sound pressure |
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x*r
发帖数: 11073 | 31 不许作弊哈,把下列英文翻译成中文,每一个单词10分,满分100分:
1.decibel
2.wail
3.faint sound
4.treble
5.jar (verb)
6.Jack Hammer
7.airhead (slang)
8.all wet (slang)
9.ammo
10.armpit (slang) |
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w*******n
发帖数: 11041 | 32 decibel是不是白痴的意思？一个都不知道。。。 |
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l******a
发帖数: 10467 | 33 虽然简单了点， 但是已经满足偶老人家的需要了， 居然ape也认识
flac， wav啥的更不用说了， 从此开这个机器不用itune了 |
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z*****n
发帖数: 7639 | 34 PathGains (read-only):
Complex vector listing the current gains of the discrete paths. W
hen you create or reset chan, PathGains is a random vector influenced by Avg
PathGaindB and NormalizePathGains (using Rayleigh distribution function)
AvgPathGaindB:
Vector listing the average gain of the discrete paths, in decibels.
NormalizePathGains:
If 1, the Rayleigh fading process is normalized such that the exp
ected value of the path gains' total power is 1. |
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z*****n
发帖数: 7639 | 35 no, there are two ways to define the sensitivity:
The international way is to use mV/Pa to indicate the sensitivity,
and old-fashioned US way to use a decibel referring 1V/Pa as 0dB.
In your first spec. I think it is the second way. So, it is
not related to the minimum pressure it can detect. The minimum
pressure is only a matter of the Noise floor of your circuit,
or the SQNR of your A/D convertor.
Sorry.
,
12 |
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h***y
发帖数: 834 | 36 ☆─────────────────────────────────────☆
wyp9136608 (Titus) 于 h 提到:
本人2009年底和太太从大陆来到旧金山湾区，年底拿到绿卡，但前途一片渺茫，英语讲
得不好，一直无业在家，在国内是学材料化学的后来在广东贸易公司打工，来美国后一
直迷茫，每天吃饭睡觉看孩子，一晃两年就过去了，今天来了个朋友劝我去读医学，将
来有发展。但我年底才可以去college读ESl，不知道哪年才能读完医学，今年已经年纪
不小了，前辈们给看看还有没有希望了，赶不赶趟。在这先谢过了！！！！！！！！！
！！！！！！！！
☆─────────────────────────────────────☆
Lexian (蒙古大夫) 于 (Wed Sep 14 01:05:25 2011, 美东) 提到:
有， 不大。
☆─────────────────────────────────────☆
wyp9136608 (Titus) 于 (Wed Sep 14 02:16:46 2011, 美东) 提到:
能不能更具体点，1%到9... 阅读全帖 |
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I***i
发帖数: 14557 | 37 Pistol shrimp have one normal claw, and one claw that is about half the size
of their bodies. The claw stays open until a muscle causes it to snap
closed, ejecting a powerful jet of water traveling at an incredible 60mph.
The snapping sound itself reaches 218 decibels - your eardrum ruptures at a
mere 150.
A bubble forms in the low pressure area behind the stream of water, which is
called a cavitation bubble. As the bubble implodes, it produces a flash of
light and the interior temperature reach... 阅读全帖 |
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B*Z
发帖数: 7062 | 38 我今天算了算，是这个结果
http://www.animations.physics.unsw.edu.au/jw/dB.htm
噪音大小是db=decibel。如果定义一个人耳刚刚好能听到的最小声音的能量是p0，db的
定义是 20 log (P1/P0)。这里log是以10为底数。如果一个声音是86db，那么它的能量
是10^(4.3)P0。如果另外一个声音是87db，它的能量是10^(4.35)P0。所以从86到87db
，声音强度增加了10^(0.05)-1=12.2%倍。这个12.2%倍和86没关系。一般来说比较两个
声音大小的公式是 10^[0.05(db2-db1)].
所以比较X5和Q5在idle的时候，10^[0.05*7.7]=2.43。就是Q5比X5吵143%倍。这个差
别有些太大了吧？ |
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w*******y
发帖数: 60932 | 39 LINK_SHOWS AS 299.00 ON SITE BUT WHEN YOU ADD TO CART ITS ONLY 25.00:
http://www.sears.com/shc/s/p_10153_12605_SPM622187201P?prdNo=1&blockNo=1&blockType=L1
Enlarge Image Electrolux EL500AZ Oxygen Ultra Air Cleaner
Sold by GoVacuum Seller Ratingbased on 0 ratings) & 4 others | Item#
SPM1715106601 |Model# EL500AZ
(Be the first to rate and review this item)
This product is available through a Sears distributor.To purchase this
product please visit our International Distri... 阅读全帖 |
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w*******y
发帖数: 60932 | 40 Found this sturdy 15 sheet shredder at Staples today for $60 after $30
rebate (EasyRebate @Staples). Add on a 25 off 75 coupon or a 25 off 100
coupon (with a few fillers) from eBay or eDruggie and you get the shredder
for $35, free shipping or free in store pickup. Pretty good deal for a big
shredder.
Link:
http://www.staples.com/Staples-15-Sheet-Cross-Cut-Shredder/product_740132?cmArea=SEARCH
Powerful and reliable full size shredder with V-Track and Blade Guard.
* 15-sheet, heavy-duty, c... 阅读全帖 |
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w*******y
发帖数: 60932 | 41 Appzilla 2:
http://iway.org/9632771
offers 120 iOS apps in one handy package. Usually $0.99, it's currently
free in the App Store.
This app is great to have for that "one off" situation where you wish you
had a particular app, but there's not really a reason to install a dedicated
app.
AppZilla(TM) 2 includes:
? (NEW!) Lyrics Search
? (NEW!) Secret Camera
? (NEW!) Voice Changer FX
? (NEW!) Scrolling LED Banner
? (NEW!) Secret Microphone
? (NEW!) Alien Radio
? (NEW!) Group SMS
? (NEW!) Group E... 阅读全帖 |
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