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| [#1] 唔洗錢就測試反射聲在你房間的影響! 唔洗錢就測試反射聲在你房間的影響! 以往有人介紹我用兩手後dull雙耳，減少反射聲進入耳朵，從而粗略估計反射聲在房間對整體聲音的影響。但手太小，又漏音，不太有效。天氣凍，想到以下方法。試一試，唔洗錢，但試完你可能會有開心大發現。 所需物品：不同厚度的(a) 有領或(b)有帽的羽絨或厚褸 (fig 1) (fig 1)  |
zbigniew821 正式會員203.xxx.xxx.40 |
2010-01-12 18:28 | |
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| [#2] 唔洗錢就測試反射聲在你房間的影響! fig 1 reposted  |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-12 18:33 |
| [#3] 唔洗錢就測試反射聲在你房間的影響! 方法： 1)開音樂 2)聽一會，這是直接音，再加四邊牆、地面及天花版的反射聲 (fig 2) (fig 2)  |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-12 18:35 |
| [#4] 唔洗錢就測試反射聲在你房間的影響! 3)穿上羽絨或厚褸 4)把羽絨或厚褸的領或帽拉上至雙耳，不要過頭。此時只大大減少及測試後牆的反射聲。除非你已做了相當處理，一般你應該聽到很大分別。(fig 3) 顯示用羽絨或厚褸阻擋「後牆」反射聲後，你大慨聽到的聲音。  |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-12 18:38 |
| [#5] 唔洗錢就測試反射聲在你房間的影響! 5)把玩羽絨或厚褸的領或帽和耳朵的的角度，你可大概控制側牆反射聲進入耳朵的多少。(fig 4) 顯示用羽絨或厚褸大部份「後牆」+「側牆」反射聲後，你大慨聽到的聲音。 Fig 4 below:  |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-12 18:40 |
| [#6] 唔洗錢就測試反射聲在你房間的影響! 6)把羽絨或厚褸的領或帽「蓋過頭」。此時不只大大減少後牆及側牆反射聲，還大大減少一個很小人會處理的地方——天花版的反射聲。(fig 5) 顯示用羽絨或厚褸阻擋「後牆」+「側牆」+「地面及天花版」的反射聲後，你大慨聽到的聲音。 Fig 5  最後修改時間: 2010-01-12 18:42:51 |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-12 18:42 |
| [#7] 唔洗錢就測試反射聲在你房間的影響! 除非你的房間已做了相當處理，一般而言做了(3) 、(4) 及(5) ，你應該會聽到很大分別。(5) 把大部份反射聲隔開，不是人人喜歡的。 但可以實驗不同程況，如果某做法是好的話，換器材之前，不如考慮搞搞間房。實驗不同程況是不好的話，也不花你錢。 用羽絨或厚褸，是取其(1) 厚度，可以真的隔開反射聲；(2) 可以彈性伸縮，再加上不同厚度的羽絨或厚褸，測驗不同層面的反射聲。 祝實驗愉快！ |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-12 18:42 |
| [#8] 唔洗錢就測試反射聲在你房間的影響! zbigniew821,hing. very good. Thankyou. |
rondy 正式會員 61.xxx.xxx.231 |
2010-01-12 20:44 |
| [#9] 唔洗錢就測試反射聲在你房間的影響! Very creative idea!!! |
hercules 正式會員 219.xxx.xxx.211 |
2010-01-12 21:46 |
| [#10] 唔洗錢就測試反射聲在你房間的影響! 非常好的分享,謝謝! |
ericpang 正式會員 219.xxx.xxx.250 |
2010-01-13 00:47 |
| [#11] 唔洗錢就測試反射聲在你房間的影響! would these exercises also have the effect of "magnifying" the signal getting into the ears by creating and "horn" around the ears, and do so by only magnifying certain frequencies but not the full spectrum just like most horns do, so in effect what you hear with either the jacket hood/cupping of hands is not so much related to isolating room wall reflection? Just an alternative thought, I may be totally wrong. |
welborne 正式會員 125.xxx.xxx.18 |
2010-01-13 01:03 |
| [#12] 唔洗錢就測試反射聲在你房間的影響! welborne long time no see. I thought about this. Yes, there may be some waves / frequencies behaving in the way you described. You're perfectly correct. But I still share with our bros here for the following reasons: 1. In working 羽絨或厚褸 in the way I described, there're t least two possible effects. 2. First, absorbing certain level and frequencies of mids and highs. Second, acting like small horns, gathering and amplifying certain frequencies. I think both effects exist. The question is relative significance. 3. When I use hands instead of 羽絨或厚褸, I feel the horn effect is much greater since I found the mids and highs are stronger. This is the case even though some reflected sounds (from back or side, depending on your palm shapes) are actually blocked by the hands. SO I think in this 'palm/hand' case, the 'horn' effect is very prominent. 4. When I use 羽絨或厚褸 - the reverse happens. The 羽絨或厚褸 become 'two horns' objectively anyway if we do (5) - they must collect and amplify certain frequencies like the hands do. The thing is, it doesn't sound like using hands. So I guess, well, the 羽絨或厚褸 is very likely to be a significant sound absorber (besides serving as a 'blocker' of reflected sound). 5. Of course, I really don't know the exact frequency range and level of absorption. So why doing this? I just like to share with some of my friends here - sometimes we read articles about importance of reflected sound but it's hard to demonstrate their signficance QUICKLY in OUR OWN ENVIORNMENT, WITHOUT COST (many articles want you to buy their products ...). Sometimes I look at the ceiling, thinking, 'oh well, what if ...'. I have used the hand-approach but it doesn't work well. Cushions are hard to bent, heavy, and inconvenient. Oh, 羽絨或厚褸 is so convenient - I could do it on my own ... 6. SO with different 'thickness' of 羽絨或厚褸 - we can experiment the possiblility of different sounds created in the VERY SAME ROOM too! I tried a sport jacket today - it has very little influence. So it also shows that hanging up light curtains is very likely to be useless - they're like the sport jacket. Hope the 羽絨或厚褸 could shed some lights on the possibility of differnet sounds to some of my friends here is my humble wish. For me, the effect is obvious - with 羽絨或厚褸 fully covering my ears (from the back) the image is definitely clearer, and sound is also 'darker'; the soundstage also seems to be narrowed a bit as well (so I may suffer / enjoy some wide imaging because of the reflected sounds; whether it's smearing of image or creating livier sound is to some degree subjective). I guess it shows us some hints of what could be achieved and how. Whether I like it - I still need time to find out. Happy listening & experimenting :) 最後修改時間: 2010-01-13 01:39:15 |
zbigniew821 正式會員 116.xxx.xxx.7 |
2010-01-13 01:30 |
| [#13] 唔洗錢就測試反射聲在你房間的影響! hi z hing, yes long time no see, hope things are fine for you so far and have a nice year in 2010. It was interseting to read your posts as i do "cup my hands around my ears" in my hifi room to get a more holographic sound. Image is so much sharper and solid hearing sound that way, and before I read yoru post today I have been thinking if that was due to that I was hearing more direct waves free from wall reflection. So your post have certainly reinforced some of my speculation. Now this gives me even more incentive to improve the acoustic treatment of my room. i can't wait to hear what i have heard with the cupping of hands without doing the act BTW, I found this, may be useful to brothers here: http://www.enjoythemusic.com/diy/1109/room_treatments.htm |
welborne 正式會員 125.xxx.xxx.18 |
2010-01-13 02:37 |
| [#14] 唔洗錢就測試反射聲在你房間的影響! Any bros tried? I'd love to see if anyone experience similar things ... I hope it's not an unique experience ... Welborne hing, thanks for the link. I may do one in the future :) |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-13 13:11 |
| [#15] 唔洗錢就測試反射聲在你房間的影響! zbigniew821師兄,, 套機set得好,有可能減少真實感,現場感,同時聽不到應有的氣氛, 可以布好一點個局,看看電源好不好,音牆靚不靚, |
tltsun 正式會員 221.xxx.xxx.238 |
2010-01-13 13:48 |
| [#16] 唔洗錢就測試反射聲在你房間的影響! For me, the effect is obvious - with 羽絨或厚褸 fully covering my ears (from the back) the image is definitely clearer, and sound is also 'darker' .................................................................. Absorption is always uneven to different frequency... I suppose it is high chance that you are actually testing on effect of less high frequency.... |
hiphopzz 正式會員 59.xxx.xxx.60 |
2010-01-13 14:01 |
| [#17] 唔洗錢就測試反射聲在你房間的影響! I suppose it is high chance that you are actually testing on effect of less high frequency.... ****** In general, yes. That's one of my purposes too. But the scenario is a bit more complex. If I do all the things, I will be hearing: 1. Direct Sound from the speaker (the most significant) 2. Reflected sound from the wall behind the speaker (also significant) 3. Unabsorbed sound, reflected from the artificial 'horn' I made. The significance of this depends on the materials. Palms/hands seem to be very reflective. (variable; thick materials - absorb mids and highs much more) 4. Sound penetrating through the materials. If very thick jacket is used, I think it blocks most of the sound. (variable) So I think I at least hear the 'direct' mids and highs and 'reflected ' mids and highs from the wall behind the speakers. Yes, the mids and highs are reduced. But if thick materials are used MOSTLY it should be the overall effect of reducing the REFLECTED mids and highs coming from the side wall and the wall behind our listening position. They're always said to be needed to be treated anyway. I admit for very spacious room, the wall behind the listening position should be a diffusor rather than absorber. But as room diminishes, it's generally recommended that a mix of absorption and diffusion is better. And in many cases of HK rooms, where the listening position is almost close to the wall, absorption seems to be a more reasonable choice. So I think while the experiment in general test the influence of reflected sound from three sides, it is actually more applicable to people like me, who has to sit almost right against the wall. And after all, it's just a half-test ... have fun ... tltsun hing: 套機set得好,有可能減少真實感,現場感,同時聽不到應有的氣氛, Could you explain more? |
zbigniew821 正式會員 203.xxx.xxx.40 |
2010-01-13 17:26 |
| [#18] 唔洗錢就測試反射聲在你房間的影響! zbigniew821師兄,,真正玩音響是不單理論的,是真真正正實踐才是,因為是複雜的.如有興趣大家可以交流,可來聽聽我幾千元的器材,做到真實感,現場感,音音清晰, 最後修改時間: 2010-01-13 19:36:25 |
tltsun 正式會員 221.xxx.xxx.238 |
2010-01-13 19:34 |
| [#19] 唔洗錢就測試反射聲在你房間的影響! tltsun c-hing, if your system can produce vivid 3D soundstage, I must come to enjoy~~ Thx ^^ |
hiphopzz 正式會員 218.xxx.xxx.12 |
2010-01-14 01:07 |
| [#20] 唔洗錢就測試反射聲在你房間的影響! tltsun兄，多謝邀請，但未來數月將要地獄式工作，冇假放，要稍後才可以了，請諒，而我也要暫停玩Hifi，好慘。你也言重了，我說的只是玩玩，真正大師是長長影子聲學專家，你能滿意自己套器材，是很開心的事。 |
zbigniew821 正式會員 219.xxx.xxx.13 |
2010-01-14 02:42 |
