Atmos天花喇叭

wadee

chhanthony 發表於 2014-12-3 11:30
請問點解要用全頻?

頭頂會多左浸野
其餘唔需，因交俾十仔處理
我理解係咁

Explorer

其他的已交由sub仔處理，是否天花的聲音則要自身負責？我未見有如此提及，請Ching 賜教。

yuppi

pac 發表於 2014-12-3 11:45
玩ATMOS不同一般杜比,天花喇叭用全頻可以使上音場低頻配合整體環境,
整體包圍感也會有幫助,比如洩聽三頭 ...

冇天花喇叭做到40Hz

HenryYuan

Klipsch KL-750 THX in Ceiling speaker, 45-20kHz =/- 3db
http://www.klipsch.com/kl-7502-thx-in-ceiling-speaker

chhanthony

wadee 發表於 2014-12-3 12:44
頭頂會多左浸野
其餘唔需，因交俾十仔處理
我理解係咁

Overhead speakers 低頻交畀subwoofer處理不可以嗎?

qq1122yq

超低頻本身係一條獨立ch，在錄音上是分拆出來，所以被稱為.1
雖然仲未有機會和祥細研究過atmos，但理論上只要做到經常提及的“低頻定位”
不論你左爆右爆、上爆下爆，低頻一樣可以做到由上而下、由下而上的...
所以理解上天花喇叭是不需要全頻，而是否需要全頻等同其它聲道要求一樣

                        
有錯請打胸！( . )( . )

kevinman

謝謝各位及Q姐

chhanthony

其實有心玩Atmos嘅朋友用少少時間睇晒呢兩份嘢就會有答案

Dolby® Atmos® Specifications
http://www.dolby.com/us/en/techn ... -specifications.pdf

Dolby Atmos® Home Theater
Installation Guidelines
http://www.dolby.com/us/en/techn ... tion-guidelines.pdf

其實Dolby建議係所有喇叭都係全頻及同一型號就最理想:-

Characteristics
Dolby Atmos audio is mixed using discrete, full-range audio objects that may move
around anywhere in three-dimensional space. With this in mind, overhead speakers
should complement the frequency response, output, and power-handling capabilities
of the listener-level speakers. Choose overhead speakers that are timbre matched as
closely as possible to the primary listener-level speakers. Overhead speakers with a
wide dispersion pattern are desirable for use in a Dolby Atmos system. This will
ensure the closest replication of the cinematic environment, where overhead
speakers are placed high above the listeners.

但亦知最唔可行，最不設實際，所以even佢畀戲院用嘅recommendation都有咁寫:-

4.5 Surround Sound Frequency Response: 40 Hz to 16 kHz, +3/–6 dB
Dolby Atmos auditoriums must support playback of full-range surround signals. To meet this specification standard, cinema
surround loudspeakers with limited bass response require bass management. If bass management is used, the surround
loudspeakers frequency response (±3 dB) must extend to 90 Hz or lower. The crossover frequency should be set based on
the capabilities of the surround loudspeakers, but must not be higher than 100 Hz.

總括嚟講所有喇叭最好用同一型號，而是要分頻將低頻交畀subwoofer處理就視符喇叭規格同擴音機效能而定。

just my 2 cents。

wadee

yuppi 發表於 2014-12-3 13:43
冇天花喇叭做到40Hz

所以我諗住用書架喇叭掛天花

AV993

pac 發表於 2014-12-3 11:45
玩ATMOS不同一般杜比,天花喇叭用全頻可以使上音場低頻配合整體環境,
整體包圍感也會有幫助,比如洩聽三頭 ...

尺寸重量振动.天花喇叭比任何喇叭更不适用全频`即使频响可以做到:也应该Set高分频点