x*****8 发帖数: 10683 | 1 【 以下文字转载自 Military 讨论区 】
发信人: xiaxie8 (活到老学到老), 信区: Military
标 题: 我竟然可以听到22kHz
发信站: BBS 未名空间站 (Mon Feb 9 04:01:53 2015, 美东)
现在我才知道我耳朵很好。
还有,我的50美元索尼重低音头戴式耳机写的是可以到22kHz,但我测试时发现它到
18kHz音量就小得可怜了,我把计算机音量开到90%才听到18kHz,而我的CVS free-
after-rebate (原价6美元) 的飞利浦耳塞竟然让我轻轻松松听过19k, 20k, 21k,
22kHz。
看来,耳机越小越容易再现高频。这也说明比较耳机还是要比重低音。 |
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x*****8 发帖数: 10683 | 2 现在我才知道我耳朵很好。
还有,我的50美元索尼重低音头戴式耳机写的是可以到22kHz,但我测试时发现它到
18kHz音量就小得可怜了,我把计算机音量开到90%才听到18kHz,而我的CVS free-
after-rebate (原价6美元) 的飞利浦耳塞竟然让我轻轻松松听过19k, 20k, 21k,
22kHz。
看来,耳机越小越容易再现高频。这也说明比较耳机还是要比重低音。 |
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T*******I 发帖数: 5138 | 3 你有没有搞错。
人耳的响应频率一般是20Hz到20kHz. 22kHz已经是超高频的高音了。 |
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y****g 发帖数: 36950 | 4 也许是'说能播放22KHZ采样的音源?不过这是磁带和调频立体声的音质。CD音质是44 |
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w***u 发帖数: 17713 | 5 知道电声的说说,一个22KHz的正弦波,怎么产生半频谐波的机械振动 |
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x*****8 发帖数: 10683 | 6 我突然发现因为前述实验误差,我误以为自己能听到22kHz,其实只能听到18kHz。真难
受! 我又不是练小提琴或者小号的,怎么耳朵不行了呢? |
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a**o 发帖数: 510 | 7 转到NTD台后,在遥控器上按MENU-->setup-->Antenna Setup
麻烦您帮我看一下下面的参数。
Antenna: 2
Type DisEqC: 1.2
Satellite: Telestar
LNB Type: Normal
LNB Freq 1: 5150
LNB Freq 2: 10750
0/12 Volt: None
22KHz Tone: 22KHz
DisEqC: Port B
C/Ku Band Control: None |
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T****t 发帖数: 11162 | 8 本来入耳式耳机要比头戴式的要好多少倍
几十万的音响设备,还比不上几十块钱的耳机呢 |
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x**d 发帖数: 201 | 10 不是你听到22k,是扬声器失真还原,实际上你听到的是12k左右。 |
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l*i 发帖数: 951 | 11 我16k就听不到了
原来windows下由一款示波器软件,里面有频率发生器。但一直不知道是我听不到还是
我的耳机高频的频响太差了,但我猜是我听不到。 |
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m******a 发帖数: 476 | 12 听不到高音也不是坏事,这样的人不容易受噪音影响。 |
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x*****8 发帖数: 10683 | 13 多谢指导!非常有可能。
我又试了别的好耳机,同样在18kHz以上我就听不见了。只有我的最便宜的不要钱的耳
机能产生嗞嗞声,可能是失真。
这可能说明我的听力上限只有18kHz了。老了! |
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p*******g 发帖数: 809 | 15 请问你的索尼耳机是哪个型号?能给个链接就更好了
谢谢 |
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p****t 发帖数: 3238 | 17 怎么说呢,比较震撼。我是说就20块钱来说。高频不错,标称22kHz,没有疑问;低频很
“吓人”,我用M6听,不能加任何的增益。有意思的是,这个耳机和团5比正好相反,
团5我是拼了老命的要密封好,而这个我倒是怕密封的太好了,声音比较厚实,但又不
是SONY的那种泥巴感的厚实。老卡说的对,这个耳机的音场的确很大,出乎意料。 |
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a***y 发帖数: 19743 | 18 fm还不如mp3吧
要用有损的,推荐用最新的iTunes Plus格式的
因为这个新的encoder把18-22khz的数据都保留了很多,可以在图上看出来
其他有损压缩格式这部分数据基本上都直接砍了 |
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g*****d 发帖数: 210 | 19 Thanks for the recommand.
I just did research and some people complains about the NFB12 "cut off"
higher frequency (>22Khz) components when taking USB input. Can you feel the
same thing?
Also does it make difference if my budget goes up to 300? I am a new cop
here and really can't believe I will burn so much money on these things... |
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l****n 发帖数: 844 | 20 俺不是技术派的...22KHz只有动物能听出来,当然有人说听不见但能感觉到我也没意见.
几百的耳放就这样了,翻不出花儿来.我推荐是因为这是DAC+耳放,而且power是独立的(
用USB电源的感觉还是功率不够),配Q701对于新警察挺好,不用折腾了(俺也是考过古的
新警察)
老cop说过一句挺好的:不论参数怎么变,自己耳朵舒服最重要
the |
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p*******m 发帖数: 20761 | 21 Mirage M-290
Loudspeaker System
add a review add a review
mirage 290is loudspeaker system
Mirage M-290
Specifications
Type: 2 way, 2 driver loudspeaker system
Frequency Response: 43Hz to 22kHz
Power Handling: 125W
Recommended Amplifier: 15 to 125W
Crossover Frequency: 1800Hz
Impedance: 8Ω
Sensitivity: 87dB
Bass: 1 x 165mm polypropylene cone
Tweeter: 1 x 25.4mm titanium dome
Enclosure: front ported
Finish: black ash vinyl, rosewood
Dimensions: 406 x 216 x 267mm
Weight: 7.1kg
比5块钱买的玩具toy效果如何... 阅读全帖 |
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z******n 发帖数: 8851 | 22 那你真厉害!
我和牛皮糖听力一样(不带耳机),让两个8岁的娃试了试,一个听到20khz,一个到底
22khz. |
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r*****s 发帖数: 262 | 25 3阶switch capacitor sigma delta modulator.
输入信号最大频率 22kHz
256倍OSR.sampling frequency 约为11MHz
请问modulator第一级里面的opamp的unity gain frequency最小为多少?
谢谢 |
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w*******y 发帖数: 60932 | 26 Use promo code = EMCZNNT75 to take off $50
You can't go wrong with Polk Audio Pricey but you get what you pay for. I
only use Yamaha, Polk Audio and Infinity, and many of my guests are always
impressed. I have a set a Polk Audio's in my garage and when we have be
projector going watching the game I get mad kudo's, I have half the
neighborhood bringing beer and steaks which is okay by me.
Model
Brand
Polk Audio
Model
RM75
Spec
Type
Home Theater Speaker System
Sold As
System
Speakers Configurat... 阅读全帖 |
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w*******y 发帖数: 60932 | 27 Vanns has the Klipsch VB15 for $99 each for today only. MSRP of $299.88/pair
. seems like a really solid price for pair of Klipsch bookshelf's.
Power handling: 75W RMS (300W peak)
Impedance: 8ohms compatible
Tweeter: 1" aluminum diaphragm compression driver with square Tractrix horn
Woofer: 5.25" magnetically shielded IMG woofer
Crossover: 2200Hz
Frequency response: 59Hz-22kHz dB
Cabinet design: Bass-reflex via rear-firing port
Black Ash vinyl finish
Inputs: Single binding posts
Link:
http://www... 阅读全帖 |
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w*******y 发帖数: 60932 | 28 Link:
http://www.musiciansfriend.com/stupid/?CJAID=10684459&CJPID=532
quote
# Frequency response: 56Hz-22kHz
# Crossover frequency: 3kHz
# Low-frequency amplifier power: 40 watts
# High-frequency amplifier power: 30 watts
# Signal-to-noise: >100dB (typical A-weighted)
# Polarity: positive signal at + input produces outward LF cone displacement
# Input impedance: 20k Ohms balanced, 10k ohms unbalanced
# Input sensitivity: 85 mV pink noise input produces 90dBA output SPL at one
meter with volume c... 阅读全帖 |
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w*******y 发帖数: 60932 | 29 Eversave has the Maximo iM-590 iMetal Isolation earphones in black or white:
http://www.eversave.com/shopping/maximo
for $24 shipped. Today (Monday) they have a $3 promo with the code CYBER
bringing them down to $21 shipped. Good set of canal buds, reviewed well as
a solid sub $100 set of canal phones, and that is at a $60 pricepoint. The
cheapest they seem to be now is close to $50. Good reviews, some good mods
to increase isolation. The fabric based cord helps keep the microphonics at
bay. I... 阅读全帖 |
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