兩聲道
CD機 | MD機 | SACD機 | DAC | CAS | 合拼擴音機 | 前級擴音機 | 後級擴音機 | 接線 | 喇叭線 | 揚聲器 | 耳機 | 耳機擴音機 | LP產品 | 膽機產品 | 開卷式錄音機 | 音響配件 | DIY音響 | 電源 | 家庭影院
電視機 | 投影機 | 錄影機 | DVD影碟機 | Blu-ray影碟機 | 多媒體播放器 | 機頂盒 | 多聲道擴音機 | 多聲道揚聲器 | 多聲道影音組合 | Mini音響組合 | 重低音揚聲器 | 輔助設備 | 同好會
同好會 | Accuphase | B&W | Burmester | Denon | Jadis | KEF | KRELL | Luxman | Marantz | Nuforce | OPPO | Pioneer | TEAC | WEISS | News
News | Blog | 其他
其他 | 所有 |
| 影音天地主旨 ﹝請按主旨作出回應﹞ 下頁 尾頁 | 寄件者 | 傳送日期
|
| [#76] 無低音的真正元凶-----駐波 打不死的丁滿! 收皮丁滿! |
CodyChan 會員203.xxx.xxx.82 |
2024-08-15 14:06 | |
|
|
|||
| [#75] 無低音的真正元凶-----駐波 四方廳最serious |
tingmoon 會員 219.xxx.xxx.137 |
2024-08-15 12:42 |
| [#74] 無低音的真正元凶-----駐波 re for self use |
cryingfreeman 正式會員 218.xxx.xxx.35 |
2010-05-29 11:34 |
| [#73] 無低音的真正元凶-----駐波 mr1010兄： 地球既eq真係有效。 googoolonglong hing, someone = cpu8088? is that right? 最後修改時間: 2009-12-16 21:41:07 |
孟波 正式會員 218.xxx.xxx.240 |
2009-12-16 21:33 |
| [#72] 無低音的真正元凶-----駐波 修正後大約係咁  |
mr1010 正式會員 116.xxx.xxx.60 |
2009-12-16 21:28 |
| [#71] 無低音的真正元凶-----駐波 no eq can fix the valley at around 100hz. |
cpu8088 正式會員 115.xxx.xxx.214 |
2009-12-16 20:26 |
| [#70] 無低音的真正元凶-----駐波 在搬前後左右也不能解決，唯有用 EQ 幫手。  |
mr1010 正式會員 116.xxx.xxx.60 |
2009-12-16 18:32 |
| [#69] 無低音的真正元凶-----駐波 thats a guide by no means it is a rule for domestic loudspeakers some japanese like to use watt puppy 3 way in a 90 sq ft room. but then their walls are not concrete while actual boundaries are wider. with some commercial inema or disco speakers they are 2 ways and design for large venues. |
cpu8088 正式會員 115.xxx.xxx.214 |
2009-12-16 16:28 |
| [#68] 無低音的真正元凶-----駐波 someone said if your room ＞ 150 sq ft you should use 3 ways speaker, if ＜ 150 sq ft use 2 ways, is that correct? thanks. |
googoolonglong 正式會員 218.xxx.xxx.30 |
2009-12-16 14:05 |
| [#67] 無低音的真正元凶-----駐波 圖中的擺放，尺寸是大概數字，聲音是極度偏薄，冇鼻音及喉底。低音清勁極爽。 在此環境試了三款揚聲器皆出現此情況，有乜辦法解救。 攪左幾個月都係冇辦法，昨日搬哂D野到小弟家中再試，完全冇中頻段薄聲情況，真係空間上出現問題，但係擺位而經試過哂，用EQ試吓是否上策，但恐防像THOMAS2兄之前所言.........在固定的聆聽環境，如果你的聆聽座位剛好是在某頻段被完cancel 掉的位置上，就算你將部amp的零件，或什至將發電廠到你對啦叭輸出的電線全部換掉，都衹能夠幫助到香港的經濟，點都挖唔番被cancel 左的聲音出來，就算你加部equalizer，硬將該頻段提升亦無用，因為主波加強，反射波照樣增多，加幾多cancel 幾多，這現象對中低頻的影響最明顯。  |
cobra 正式會員 61.xxx.xxx.50 |
2009-12-15 22:41 |
| [#66] 無低音的真正元凶-----駐波 d = V * t so, path differnt = v * time delay assume sound velocity = 350 m/s time delay = 30 ms then path different = 10.5m ie, the echo occurs if the orignal sound and his reflection(most are multi-reflection) have 10.5m path diffferent. It is comparatively easy to happen. In a untreated room, we can hear my echo when talking!! Even if no echo happen, reflection is no good to sound. In general,in a treated room, we intend to reduce the reflection wave which make sound unclear---I think this is what we call is "亂" and "散". |
lts300 正式會員 210.xxx.xxx.123 |
2009-05-08 21:45 |
| [#65] 無低音的真正元凶-----駐波 As in my previous post, standing wave occurs only if the distance between the speaker and wall is 2.9m for 60Hz sinusoidal sound. If so happen, standing wave would also occur for the frequency of multiple of 60Hz, ie 60Hz*N, 120, 240, 480, 980Hz and so on. The lower frequency the longer wave length The higher freqency the shorter wave length. So, it is hard to hear standing wave in high freqency. |
lts300 正式會員 210.xxx.xxx.123 |
2009-05-08 21:13 |
| [#64] 無低音的真正元凶-----駐波 every brother, when we talk about standing wave for sound, can some one tell me what will we hear when standing wave occurs? In my 20 years experience, I never recongise the standing wave. |
lts300 正式會員 210.xxx.xxx.123 |
2009-05-08 21:02 |
| [#63] 無低音的真正元凶-----駐波 Parallel walls cause “standing waves and flutter echoes”, however, the behaviour of rooms to “steady state and impulsive (also known as transient)” sounds tends to be “very different”. Flutter echoes are normally only perceivable “if there is a time interval or more than about 30 ms (something related to Hass effect) between the discrete repeats”. With short time intervals, our ear tends to integrate the sound power to produce a continuous sound of higher loudness, but usually with a metallic ring. Unlike the “precise reflected phase relationships” which are “necessary for resonant standing waves” to build up, “transient sounds do not exhibit phase shifts”. Rather, with temporal displacements, they exhibit phase slopes, which contains a great number of freqs. As a transient signal contains a great no. of freqs (e.g. higher freqs), each contributing freq will have its own individual phase shift. |
長長影子 正式會員 219.xxx.xxx.222 |
2009-05-08 14:52 |
| [#62] 無低音的真正元凶-----駐波 圖中的擺放，尺寸是大概數字，聲音是極度偏薄，冇鼻音及喉底。低音清勁極爽。 在此環境試了三款揚聲器皆出現此情況，有乜辦法解救。 |
cobra 正式會員 61.xxx.xxx.50 |
2009-05-08 14:48 |
| [#61] 無低音的真正元凶-----駐波 長長影子 hing, from previous posts I know you are an expert. Could you help me to solve a question of mine that I am not sure?: 1. In a small room, for untreated parallel walls - lower frequencies cause standing waves, and higher frequencies cause flutter echoes. Can I understand this way? 2. If so, why? What characteristics of sound waves and small room (and speakers) make higher frequencies not to form standing waves? Theoretically speaking, I can't see why it could not be so, if the high frequency waves are bounced back and forth with "1/2 wavelength * 1/N" where N is any integer. Put simply, what makes high frequencies not forming 'standing waves' (but according to many, flutter echoes with a different 'sonic' effect)? Its ray properties and interaction with objects in the room? Its amount of energy? Or??? Thanks in advance ... |
zbigniew821 正式會員 58.xxx.xxx.30 |
2009-05-08 01:29 |
| [#60] 無低音的真正元凶-----駐波 Stationary Wave = 駐波 Interference = 干涉 兩者為物理現象 http://zh.wikipedia.org/w/index.php?title=%E9%A7%90%E6%B3%A2&variant=zh-hant http://zh.wikipedia.org/w/index.php?title=%E5%B9%B2%E6%B6%89_(%E7%89%A9%E7%90%86%E5%AD%A6)&variant=zh-hant 波浪牆，散射板，tube trap等 are used to reduce reflection cos reflection make sound "亂" and "散". |
lts300 正式會員 210.xxx.xxx.123 |
2009-05-07 21:48 |
| [#59] 無低音的真正元凶-----駐波 Or using some software to simulate your room acoustics:  |
CKL2 正式會員 202.xxx.xxx.171 |
2009-05-07 16:49 |
| [#58] 無低音的真正元凶-----駐波 可唔可以買很多發泡膠粒, 倒到一屋都係, 請埋亞殺媽人黎... 望住 D 粒粒調聲咪電囉...呵呵 !! |
diytfy 正式會員 155.xxx.xxx.45 |
2009-05-07 16:21 |
| [#57] 無低音的真正元凶-----駐波 一般業餘可以試下放pink noise然後用octave band or CPB analyzer等工具黎即時monitor頻響曲線黎改變喇叭擺位同埋搵聆聽位置會比較簡單快捷可靠, 更為low cost嘰應用可以放white noise然後用FFT analyzer.. 有時間有資源嘰話當然係量埋ETF,RT,etc, 有足夠數據後仲可以對症下藥處理埋反射,殘響等問題.. 當然居家嘰先天問題未必可以完全解決, 講到空間有完善規劃嘰標準聆聽室無可厚非點都一定有優勢..  |
長長影子 正式會員 219.xxx.xxx.222 |
2009-05-07 15:50 |
