有個新發現,分享一下..Win2000底下的WDM用途
原本win98底下好像是不能同時用兩個程式以上開啟兩個音效檔案的
兩千的WDM似乎就是為了解決這個問題而運應而生
所以我就用cool edit 製造20hz正弦波來跑
(我知道留言板上大多是勸告少服這帖猛藥 以免操掛耳機
不過還是心癢癢...SO,....^^)
另外再加上從napster 下載來的近4000首Mp3用Winamp亂數模式撥放
音量約大於是正常聆聽音量的1.5倍
至於20hz正弦波的音量,我不是用聽的 而是用看的,
以前都只是聽說 這次可真是見到傳說中所謂振膜震動.......太神奇了!!
我就是把音量調到剛好可以看見振膜震動的大小 這樣只跑了一個晚上
今天一起來聽.....果然是進步不少 BASS的聲音越來清楚 不像昨天有還有點糊湖的感覺
聆聽的平衡感也更為舒適(昨天聽MP3真的是蠻痛苦的 還要調EQ一堆有的沒的今天就不用了 )
如果要我去判定耳機是否已經run開 不知道這樣敘述行不行(只是個純粹假設而已 我還要慢慢驗證)
'當大音量時 如果比之前還擁有更多的細節
而且沒有之前那種吵雜感而是可以讓自己舒適聆聽時 就表示run in 有所成效
這樣不斷反覆的試驗 到最後聽不出來有所進步時 這隻耳機鷲run in完成了'
大概就這樣 我該上課去了.....對了 我一直不知道怎麼判別所謂人聲的好壞(是不是也代表了中頻的好壞?)
這就請教一下各位大大了 ^_^
AndAudio.com
聊耳機、品音樂、論音響、玩電子DIY以及哈拉風花雪月的地方Win 2000Run in 耳機的新發現漢一些問題請教
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Win 2000Run in 耳機的新發現漢一些問題請教
由 扁扁魚 發表於 週四 4月 12, 2001 7:50 am
- 扁扁魚
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由 fredpeng 發表於 週四 4月 12, 2001 11:35 am
最好 run 音響器材的頻率，並非 20Hz,而是 Pink Noise。 Pink Noise 聽起來就是全然的噪音，其涵貍狾鹿W段，以能量而言，也是所有合成頻率中最大的。以 Pink Noise 操機，還可將已磁化的金屬接線，接點打亂，所以既使老器材以 pink noise run 半小時都可聽出聲音有些改善。
Pink Noise 在 Cool Edit 中有提供，釵h TestCD 如 Stereophile Test CD 也有。另外在 DZ 的 FTP 中，我也曾 upload 一個 MP3 的 pink noise 檔，有需要的人自己去 download.
Pink Noise 在 Cool Edit 中有提供，釵h TestCD 如 Stereophile Test CD 也有。另外在 DZ 的 FTP 中，我也曾 upload 一個 MP3 的 pink noise 檔，有需要的人自己去 download.
- fredpeng
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由 扁扁魚 發表於 週四 4月 12, 2001 3:11 pm
To fredpeng大哥
謝謝你,這樣我又知道了一項run IN 的好方法
不過Pink Noise 實在是很刺耳 無法和ｍP3一起撥放 因為我打電腦會一起撥放20HZ正弦波和MP3(因為20hz幾乎是沒有聲音的 所以並不會影響到聆聽MP3)
不過 Pink noise 倒是可以趁著沒人在家的時候好好的RUN 呵呵...希望早日把我的M1完成RUN IN
因為同學一聽到'三千塊的耳機'就馬上一副
'有錢人用的奢侈品'的樣子 實在是很嘔
所以一定要讓他們知道什麼叫做好聲音
呵呵~~~能拖一個跳入火坑就多拖一個吧~~~^^
謝謝你,這樣我又知道了一項run IN 的好方法
不過Pink Noise 實在是很刺耳 無法和ｍP3一起撥放 因為我打電腦會一起撥放20HZ正弦波和MP3(因為20hz幾乎是沒有聲音的 所以並不會影響到聆聽MP3)
不過 Pink noise 倒是可以趁著沒人在家的時候好好的RUN 呵呵...希望早日把我的M1完成RUN IN
因為同學一聽到'三千塊的耳機'就馬上一副
'有錢人用的奢侈品'的樣子 實在是很嘔
所以一定要讓他們知道什麼叫做好聲音
呵呵~~~能拖一個跳入火坑就多拖一個吧~~~^^
- 扁扁魚
- SR40
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由 JesseChen 發表於 週五 4月 13, 2001 1:50 pm
Pink Noise 在 Cool Edit 中有提供，釵h TestCD 如 Stereophile Test CD 也有。另外在 DZ 的 FTP 中，我也曾 upload 一個 MP3 的 pink noise 檔，有需要的人自己去 download.
請問DZ的FTP在哪裡?
Jesse Chen
jesse@widax.com.tw
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由 扁扁魚 發表於 週六 4月 14, 2001 1:13 am
最好 run 音響器材的頻率，並非 20Hz,而是 Pink Noise。 Pink Noise 聽起來就是全然的噪音，其涵貍狾鹿W段，以能量而言，也是所有合成頻率中最大的。以 Pink Noise 操機，還可將已磁化的金屬接線，接點打亂，所以既使老器材以 pink noise run 半小時都可聽出聲音有些改善。
Pink Noise 在 Cool Edit 中有提供，釵h TestCD 如 Stereophile Test CD 也有。另外在 DZ 的 FTP 中，我也曾 upload 一個 MP3 的 pink noise 檔，有需要的人自己去 download.
請問一下:在cool edit 裡還有所謂white noise和
brown noise 這些顏色代表的音效是什麼意思呢?又有什麼差別呢?
- 扁扁魚
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由 fredpeng 發表於 週日 4月 15, 2001 7:58 am
操一段 Elliott Sound Products 的解釋：
For audio testing, a pink noise source is an invaluable tool. It is essentially a flat frequency response noise source, and will quickly show any anomolies in speaker systems, room acoustics and crossover networks.
White noise (the sound you hear when a TV is tuned to a non-existent station) has a frequency characteristic which raises the power level by 3dB with each increasing octave, and is not suitable for response testing (and will probably blow your tweeters as well).
這裡有 Brown Noise 的線上播放，自己去聽。
下面是 Joseph S. Wisniewski 的文章
'The Color of Noise' (見 http://www.msaxon.com/colors.htm)
White noise (common definition) power density is constant over a finite frequency range. AKA Johnson noise.
Pink noise (common definition) power density decreases 3dB per octave with increasing frequency (density proportional to 1/f) over a finite frequency range which does not include DC. Each octave contains the same amount of power. Many point out that this is not a trivial filtering problem. AKA flicker noise.
Red noise (common definition within the oceanographic field, contributed by P.J. 'Josh' Rovero) (Anyone have the spectrum?)
oceanic ambient noise (ie, noise distant from the sources) is often described as 'red' due to the selective absorption of higher frequencies.'
Orange noise (anonymous contribution) (Anyone foolish enough to want the spectrum?)
quasi-stationary noise with a finite power spectrum with a finite number of small bands of zero energy dispersed throughout a continuous spectrum. These bands of zero energy are centered about the frequencies of musical notes in whatever system of music is of interest. Since all in-tune musical notes are eliminated, the remaining spectrum could be said to consist of sour, citrus, or 'orange' notes. Orange noise is most easily generated by a roomfull of primary school students equipped with plastic soprano recorders.
Green noise (defined by some folks producing relaxation tapes, Mystic Moods, I believe) supposedly the background noise of the world. A really long term power spectrum averaged over several outdoor sites. Rather like pink noise with a hump added around 500Hz. (Anyone have the spectrum?)
Blue noise (FS-1037C) power density increases 3dB per octave with increasing frequency (density proportional to f) over a finite frequency range. This can be good noise for dithering.
Purple noise (origional definition, contributed by Jon Risch) power density increases 6dB per octave with increasing frequency (density proportional to f^2) over a finite frequency range. Differentiated white noise. AKA violet noise.
Grey noise (heard this one a couple of times, but can't put my finger on a source) noise subjected to a psychoacoustic equal loudness curve (such as an inverted a-weight curve) over a given range of frequencies, so that it sounds like it is equally loud at all frequencies. This would be a better definiton of 'white noise' than the 'equal power at all frequencies' definition, since real 'white light' has the power spectrum of a 5400K black body, not an equal power spectrum.
Brown noise (Jon M. Risch, rbmccammon) power density decreases 6dB per octave with increasing frequency (density proportional to 1/f^2) over a frequency range which does not include DC. Is not named for a power spectrum that suggests the color brown, rather, the name is a coruption of Brownian motion. If we were going to pick a color, red might be good since pink noise lies between this noise and white noise. Unfortuantly, red is already taken. AKA 'random walk' or 'drunkard's walk' noise.
**** Three different definitions of black (silent) noise ****
Black noise (contributed by Jeff Mercure, his own definition) whatever comes out of an active noise control system and cancles an existing noise, leaving the world world noise free. (The comic book character 'Iron Man' used to have a 'black light beam' that could darken a room like this, and popular SCI-FI has an annoying tendancy to portray active noise control in this light.)
Black noise (seen in the sales literature for an ultrasonic vermin repeller) power density is constant for a finite frequency range above 20kHz. Ultrasonic white noise. This black noise is like the so-called 'black light' with frequencies too high to be preceived as sound, but still capable of affecting you or your surroundings.
Black noise (Manfred Schroeder, 'fractals, chaos, power laws,' contributed by Mike Arnao)
has an f ^ -beta spectrum, with beta > 2, and is characteristic of 'natural and unnatural catastrophes like floods, droughts, bear markets, and various outrageous outages, such as those of electrical power.' further, 'Because of their black spectra, such disasters often come in clusters.'
--
For audio testing, a pink noise source is an invaluable tool. It is essentially a flat frequency response noise source, and will quickly show any anomolies in speaker systems, room acoustics and crossover networks.
White noise (the sound you hear when a TV is tuned to a non-existent station) has a frequency characteristic which raises the power level by 3dB with each increasing octave, and is not suitable for response testing (and will probably blow your tweeters as well).
這裡有 Brown Noise 的線上播放，自己去聽。
下面是 Joseph S. Wisniewski 的文章
'The Color of Noise' (見 http://www.msaxon.com/colors.htm)
White noise (common definition) power density is constant over a finite frequency range. AKA Johnson noise.
Pink noise (common definition) power density decreases 3dB per octave with increasing frequency (density proportional to 1/f) over a finite frequency range which does not include DC. Each octave contains the same amount of power. Many point out that this is not a trivial filtering problem. AKA flicker noise.
Red noise (common definition within the oceanographic field, contributed by P.J. 'Josh' Rovero) (Anyone have the spectrum?)
oceanic ambient noise (ie, noise distant from the sources) is often described as 'red' due to the selective absorption of higher frequencies.'
Orange noise (anonymous contribution) (Anyone foolish enough to want the spectrum?)
quasi-stationary noise with a finite power spectrum with a finite number of small bands of zero energy dispersed throughout a continuous spectrum. These bands of zero energy are centered about the frequencies of musical notes in whatever system of music is of interest. Since all in-tune musical notes are eliminated, the remaining spectrum could be said to consist of sour, citrus, or 'orange' notes. Orange noise is most easily generated by a roomfull of primary school students equipped with plastic soprano recorders.
Green noise (defined by some folks producing relaxation tapes, Mystic Moods, I believe) supposedly the background noise of the world. A really long term power spectrum averaged over several outdoor sites. Rather like pink noise with a hump added around 500Hz. (Anyone have the spectrum?)
Blue noise (FS-1037C) power density increases 3dB per octave with increasing frequency (density proportional to f) over a finite frequency range. This can be good noise for dithering.
Purple noise (origional definition, contributed by Jon Risch) power density increases 6dB per octave with increasing frequency (density proportional to f^2) over a finite frequency range. Differentiated white noise. AKA violet noise.
Grey noise (heard this one a couple of times, but can't put my finger on a source) noise subjected to a psychoacoustic equal loudness curve (such as an inverted a-weight curve) over a given range of frequencies, so that it sounds like it is equally loud at all frequencies. This would be a better definiton of 'white noise' than the 'equal power at all frequencies' definition, since real 'white light' has the power spectrum of a 5400K black body, not an equal power spectrum.
Brown noise (Jon M. Risch, rbmccammon) power density decreases 6dB per octave with increasing frequency (density proportional to 1/f^2) over a frequency range which does not include DC. Is not named for a power spectrum that suggests the color brown, rather, the name is a coruption of Brownian motion. If we were going to pick a color, red might be good since pink noise lies between this noise and white noise. Unfortuantly, red is already taken. AKA 'random walk' or 'drunkard's walk' noise.
**** Three different definitions of black (silent) noise ****
Black noise (contributed by Jeff Mercure, his own definition) whatever comes out of an active noise control system and cancles an existing noise, leaving the world world noise free. (The comic book character 'Iron Man' used to have a 'black light beam' that could darken a room like this, and popular SCI-FI has an annoying tendancy to portray active noise control in this light.)
Black noise (seen in the sales literature for an ultrasonic vermin repeller) power density is constant for a finite frequency range above 20kHz. Ultrasonic white noise. This black noise is like the so-called 'black light' with frequencies too high to be preceived as sound, but still capable of affecting you or your surroundings.
Black noise (Manfred Schroeder, 'fractals, chaos, power laws,' contributed by Mike Arnao)
has an f ^ -beta spectrum, with beta > 2, and is characteristic of 'natural and unnatural catastrophes like floods, droughts, bear markets, and various outrageous outages, such as those of electrical power.' further, 'Because of their black spectra, such disasters often come in clusters.'
--
最好 run 音響器材的頻率，並非 20Hz,而是 Pink Noise。 Pink Noise 聽起來就是全然的噪音，其涵貍狾鹿W段，以能量而言，也是所有合成頻率中最大的。以 Pink Noise 操機，還可將已磁化的金屬接線，接點打亂，所以既使老器材以 pink noise run 半小時都可聽出聲音有些改善。
Pink Noise 在 Cool Edit 中有提供，釵h TestCD 如 Stereophile Test CD 也有。另外在 DZ 的 FTP 中，我也曾 upload 一個 MP3 的 pink noise 檔，有需要的人自己去 download.
請問一下:在cool edit 裡還有所謂white noise和
brown noise 這些顏色代表的音效是什麼意思呢?又有什麼差別呢?
- fredpeng
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由 fredpeng 發表於 週日 4月 15, 2001 8:00 am
Brown Noise 的線上播放
http://cas.bellarmine.edu/tietjen/Anima ... signal.htm
http://cas.bellarmine.edu/tietjen/Anima ... signal.htm
- fredpeng
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由 Patrick 發表於 週日 4月 15, 2001 2:20 pm
oceanic ambient noise (vs. red noise?)
它是用來描述聲音經過一段距離的傳播後
對於特殊高頻的選擇性吸收
它指的是只有空氣還是包括了牆壁、桌椅窗簾等的吸收?
小p以前聽到的說法
男生、女生同樣站在一塊空地上大喊
女生的聲音可以傳得比較遠
'因為高頻隨著距離增加，其能量減少得比低頻慢'???
那時候聽來就很不可思議
它和oceanic ambient noise應該不同吧?
否則一個說的是高頻減得快，一個說的是高頻減得慢
它是用來描述聲音經過一段距離的傳播後
對於特殊高頻的選擇性吸收
它指的是只有空氣還是包括了牆壁、桌椅窗簾等的吸收?
小p以前聽到的說法
男生、女生同樣站在一塊空地上大喊
女生的聲音可以傳得比較遠
'因為高頻隨著距離增加，其能量減少得比低頻慢'???
那時候聽來就很不可思議
它和oceanic ambient noise應該不同吧?
否則一個說的是高頻減得快，一個說的是高頻減得慢
- Patrick
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由 Patrick 發表於 週日 4月 15, 2001 2:22 pm
再來
小p想到的就是那個路邊量噪音的分貝計
它表示的是聲音'能量'的大小嗎?
小p的下個目標
就是..咳...咳...(這是主題囉)
有些音響店賣的喇叭
(剛好前陣子小p才團購了vifa單體)
都會測一張'頻率響應曲線'
兩支喇叭和一個麥克風呈正三角形
然後放出不同頻率的聲音...(以下略)
它所量得的
是'能量'吧!
也釩雃h人都會說平直的頻響曲線
結果會'音響性很好，但是音樂性不足'
這...這...這...
小p不是要說'科學無用'
而是要說'這個方法還不夠嚴謹完備'
至於還有那些要補充的
就等大家討論了
(其實是手痠想睡覺了:ho:)
小p想到的就是那個路邊量噪音的分貝計
它表示的是聲音'能量'的大小嗎?
小p的下個目標
就是..咳...咳...(這是主題囉)
有些音響店賣的喇叭
(剛好前陣子小p才團購了vifa單體)
都會測一張'頻率響應曲線'
兩支喇叭和一個麥克風呈正三角形
然後放出不同頻率的聲音...(以下略)
它所量得的
是'能量'吧!
也釩雃h人都會說平直的頻響曲線
結果會'音響性很好，但是音樂性不足'
這...這...這...
小p不是要說'科學無用'
而是要說'這個方法還不夠嚴謹完備'
至於還有那些要補充的
就等大家討論了
(其實是手痠想睡覺了:ho:)
- Patrick
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由 fredpeng 發表於 週日 4月 15, 2001 8:24 pm
Stereophile Test CD 有一曲專門讓人 run
音響設備。他是一推人，大叫亂叫，還有人敲鼓
敲鈸，一堆亂七八糟聲音混在一起。既好笑，
又有效，而又不傷器材。
音響設備。他是一推人，大叫亂叫，還有人敲鼓
敲鈸，一堆亂七八糟聲音混在一起。既好笑，
又有效，而又不傷器材。
如果各位前輩都算先烈級的話...
那我這個後生晚輩可就是前仆後繼了^^
我想這世界上沒有幾個人會用我現在這種run 法run 耳機吧 (至於用什麼方法...還是不要說出來給各位見笑好了)
by沒耐心的擁有強烈實驗性好奇心和死耳機不死貧僧的精神的扁魚^^
- fredpeng
- SR125
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