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發表於 2010-5-11 23:39 | 顯示全部帖子

多謝分享
弊...睇左個diagram有少少唔明,
個zigzag design(尾2圖)有咩作用,
好似洗唔到咁bor!
coletrain 發表於 2010-5-11 23:38

zigzag design好聰明......同死氣喉的design相同....

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

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發表於 2010-5-11 23:50 | 顯示全部帖子

即用黎散音??????
coletrain 發表於 2010-5-11 23:44

sound barrier.........

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

Rank: 8 Rank: 8

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發表於 2010-5-11 23:59 | 顯示全部帖子

120DB有幾响?
如果發仔或者吵吵一叫(盡力嗰陣), 好似馬路邊鑿地D大型震鑽咁响
YVONNE 發表於 2010-5-11 23:22

120DB.....係高噪音工作....要比hearing protection你工人.....唔係labour department 告你呀

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

Rank: 8 Rank: 8

4^#

發表於 2010-5-12 00:09 | 顯示全部帖子

個工人咪我囉...
YVONNE 發表於 2010-5-12 00:02

你作為音樂家.......小心小心la......
120db = jet take off LA......
因為１０ｄｂ　己ｄｏｕｂｌｅ　音量．．．．．

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

Rank: 8 Rank: 8

5^#

發表於 2010-5-12 13:58 | 顯示全部帖子

仲有DB係唔可以做指標....因為FREQUENCY對人的EAR都有影響.....所以要 X 個FACTOR用DBA....
一個高音70DB比一個低音70DB對人的EAR傷害大好多.....

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

Rank: 8 Rank: 8

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發表於 2010-5-12 14:25 | 顯示全部帖子

街坊, Ming, Cozzy,

多謝哂您講解有關音童DB 和對人嘅EAR的 effect. 因而我對此了解多了. 唔該晒 !
JoeLee 發表於 2010-5-12 14:21

想知多d的話下次見面再詳談......因為noise control 係好有趣的topic

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

Rank: 8 Rank: 8

7^#

發表於 2010-5-12 17:03 | 顯示全部帖子

76# JoeLee

Cozzy 係 Mechanical Engineering出身架，工作噪音係佢範疇~
cheerios 發表於 2010-5-12 17:01

我都係識小小........因為noise 係 building service 的　Topic.

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

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發表於 2010-5-12 21:52 | 顯示全部帖子

好奇問吓,
i.e. 1000cc兩個碌, 廠車, 唔要air filter, 再行直出喉, 走cat, 走muffler, 盡油有幾多db度?
cheerios 發表於 2010-5-12 17:26

好難講因為要比多一個distance先可以estimate.....
fim的rule ---- the maximum noise from 100 meters will be 81 dBA....

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!

Rank: 8 Rank: 8

9^#

發表於 2010-5-13 00:38 | 顯示全部帖子

wah haha!!~~ 多謝你峰兄
打番燈成個mon醒晒
clymcm 發表於 2010-5-12 23:12

師妹我有幾十張相因為under左唔出得街.......你可唔可以...................................................................

教我整呀

我係永恆的新手
Supporter of Wild Bird Trust Cape Parrot Project
uPholi - want a forest!!!