喇叭位置+聲壓問題

發表人 **luckybeanbean** 發表於 2005-05-24, 18:21

點解我有個喇叭擺係墻角,墻有窗,就算窗冇開, 用咪度db會小過右有面較空曠嘅喇叭? 小2個db添 :question2:

乜唔係墻角會令聲加大咩?

發表人是旦發表於 2005-05-24, 18:24

係咪有窗簾吸佐D聲呀!

發表人 **拓荒者** 發表於 2005-05-24, 18:27

定還是左右喇叭本身唔係百份百一樣!!!
調轉兩個speaker或者換轉兩條speaker cable去check下啦 :question2:

發表人 **luckybeanbean** 發表於 2005-05-24, 18:35

拓荒者寫:定還是左右喇叭本身唔係百份百一樣!!!
調轉兩個speaker或者換轉兩條speaker cable去check下啦

咁大鑊?

發表人 **拓荒者** 發表於 2005-05-24, 18:44

luckybeanbean 寫:
拓荒者寫:定還是左右喇叭本身唔係百份百一樣!!!
調轉兩個speaker或者換轉兩條speaker cable去check下啦

咁大鑊?

唔緊要喎,個錶本身都有誤差....況且您祇係度到兩個dB !!!!
用我方法就知係咩speaker !!!!
如果換轉係都係有窗個面多d咁咪即係環境問題.....因為您唔係用隔聲wondow :eusa_dance:

發表人 **peterso** 發表於 2005-05-24, 20:44

有冇駁錯 phrase :question2:

發表人 **luckybeanbean** 發表於 2005-05-25, 09:44

peterso 寫:有冇駁錯 phrase

冇喎,就算錯phase都唔會一邊細一邊大掛,等我得閒試吓兩邊掉吓先 :guitar:

發表人 **拓荒者** 發表於 2005-05-25, 09:52

luckybeanbean 寫:
peterso 寫:有冇駁錯 phrase

冇喎,就算錯phase都唔會一邊細一邊大掛,等我得閒試吓兩邊掉吓先

又無調轉個speaker(試環境)又或轉條cable(試speaker)呀!?

:question2:

發表人 **Wah On** 發表於 2006-11-20, 12:28

May I ask
use what tool to measure the sound volume level ?

發表人 **Rookie** 發表於 2006-12-12, 13:31

Wah On 寫:May I ask
use what tool to measure the sound volume level ?

Use sound pressure meter, you can find it from those electronic shops in Alp Liu Street easily.

發表人 **luckybeanbean** 發表於 2008-02-22, 11:41

luckybeanbean 寫:點解我有個喇叭擺係墻角,墻有窗,就算窗冇開, 用咪度db會小過右有面較空曠鮋喇叭? 小2個db添乜唔係墻角會令聲加大咩?

finally know why. The right speaker far from wall has early reflection from side wall, together with a continuous avamp test tone, it will add the sound pressure. The left speaker next to the wall doesn't have this delayed reflection, so the sound pressure is not as great, although the bass response is different. :modlaugh:

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喇叭位置+聲壓問題

喇叭位置+聲壓問題

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