以(Yi)下(Xia)介(Jie)绍(Shao)主(Zhu)要(Yao)针(Zhen)对(Dui)公(Gong)共(Gong)广(Guang)播(Bo)的(De)特(Te)点(Dian)和(He)功(Gong)能(Neng)，(?)若(Ruo)需(Xu)了(Liao)解(Jie)更(Geng)多(Duo)详(Xiang)情(Qing)请(Qing)致(Zhi)电(Dian)18788591718

公(Gong)共(Gong)广(Guang)播(Bo)系(Xi)统(Tong)属(Shu)于(Yu)扩(Kuo)声(Sheng)音(Yin)响(Xiang)系(Xi)统(Tong)中(Zhong)的(De)一(Yi)个(Ge)分(Fen)支(Zhi)，(?)而(?)扩(Kuo)声(Sheng)音(Yin)响(Xiang)系(Xi)统(Tong)又(You)称(Cheng)专(Zhuan)业(Ye)音(Yin)响(Xiang)系(Xi)统(Tong)涉(She)及(Ji)电(Dian)声(Sheng)、(?)建(Jian)声(Sheng)和(He)乐(Le)声(Sheng)三(San)种(Zhong)学(Xue)科(Ke)的(De)边(Bian)缘(Yuan)科(Ke)学(Xue)。(?)

公(Gong)共(Gong)广(Guang)播(Bo)的(De)传(Chuan)统(Tong)方(Fang)式(Shi)：(?)

是(Shi)通(Tong)过(Guo)音(Yin)频(Pin)线(Xian)把(Ba)模(Mo)拟(Ni)功(Gong)率(Lu)信(Xin)号(Hao)传(Chuan)输(Shu)到(Dao)终(Zhong)端(Duan)扬(Yang)声(Sheng)器(Qi)上(Shang)，(?)以(Yi)机(Ji)房(Fang)的(De)功(Gong)率(Lu)放(Fang)大(Da)器(Qi)到(Dao)扬(Yang)声(Sheng)器(Qi)是(Shi)采(Cai)用(Yong)高(Gao)电(Dian)平(Ping)传(Chuan)输(Shu)的(De)，(?)一(Yi)般(Ban)为(Wei)100V或(Huo)70V，(?)其(Qi)优(You)点(Dian)是(Shi)线(Xian)路(Lu)损(Sun)耗(Hao)少(Shao)、(?)负(Fu)载(Zai)联(Lian)接(Jie)方(Fang)便(Bian)，(?)只(Zhi)是(Shi)把(Ba)带(Dai)降(Jiang)压(Ya)变(Bian)压(Ya)器(Qi)的(De)扬(Yang)声(Sheng)器(Qi)并(Bing)接(Jie)在(Zai)线(Xian)路(Lu)上(Shang)即(Ji)可(Ke)。(?)其(Qi)公(Gong)共(Gong)广(Guang)播(Bo)的(De)特(Te)点(Dian)有(You)以(Yi)下(Xia)几(Ji)个(Ge)方(Fang)面(Mian)：(?)

第(Di)一(Yi)：(?)良(Liang)好(Hao)的(De)电(Dian)声(Sheng)装(Zhuang)置(Zhi)性(Xing)能(Neng)。(?)当(Dang)前(Qian)公(Gong)共(Gong)广(Guang)播(Bo)系(Xi)统(Tong)大(Da)多(Duo)属(Shu)于(Yu)数(Shu)字(Zi)设(She)备(Bei)，(?)这(Zhe)些(Xie)设(She)备(Bei)大(Da)多(Duo)采(Cai)用(Yong)性(Xing)能(Neng)优(You)良(Liang)的(De)电(Dian)声(Sheng)系(Xi)统(Tong)，(?)电(Dian)声(Sheng)系(Xi)统(Tong)也(Ye)是(Shi)公(Gong)共(Gong)广(Guang)播(Bo)系(Xi)统(Tong)的(De)重(Zhong)要(Yao)组(Zu)成(Cheng)部(Bu)分(Fen)。(?)

第(Di)二(?)：(?)系(Xi)统(Tong)设(She)计(Ji)的(De)合(He)理(Li)性(Xing)。(?) 很(Hen)多(Duo)公(Gong)共(Gong)场(Chang)所(Suo)覆(Fu)盖(Gai)范(Fan)围(Wei)很(Hen)广(Guang)，(?)比(Bi)如(Ru)火(Huo)车(Che)站(Zhan)、(?)机(Ji)场(Chang)等(Deng)大(Da)型(Xing)公(Gong)共(Gong)交(Jiao)通(Tong)设(She)施(Shi)，(?)因(Yin)此(Ci)，(?)这(Zhe)些(Xie)场(Chang)所(Suo)在(Zai)使(Shi)用(Yong)公(Gong)共(Gong)广(Guang)播(Bo)系(Xi)统(Tong)时(Shi)，(?)对(Dui)声(Sheng)音(Yin)传(Chuan)输(Shu)范(Fan)围(Wei)的(De)要(Yao)求(Qiu)会(Hui)更(Geng)高(Gao)。(?)

第(Di)三(San)：(?)声(Sheng)音(Yin)的(De)自(Zi)然(Ran)特(Te)性(Xing)。(?) 当(Dang)前(Qian)，(?)许(Xu)多(Duo)用(Yong)户(Hu)对(Dui)公(Gong)用(Yong)广(Guang)播(Bo)系(Xi)统(Tong)的(De)要(Yao)求(Qiu)，(?)除(Chu)了(Liao)设(She)备(Bei)能(Neng)有(You)较(Jiao)好(Hao)的(De)声(Sheng)音(Yin)传(Chuan)输(Shu)范(Fan)围(Wei)外(Wai)，(?)还(Huan)需(Xu)要(Yao)该(Gai)系(Xi)统(Tong)音(Yin)效(Xiao)自(Zi)然(Ran)清(Qing)晰(Xi)，(?)能(Neng)够(Gou)在(Zai)部(Bu)分(Fen)流(Liu)行(Xing)音(Yin)乐(Le)播(Bo)放(Fang)时(Shi)给(Gei)观(Guan)众(Zhong)带(Dai)来(Lai)愉(Yu)悦(Yue)感(Gan)。(?)

　(?)广(Guang)义(Yi)的(De)广(Guang)播(Bo)系(Xi)统(Tong)包(Bao)含(Han)扩(Kuo)声(Sheng)系(Xi)统(Tong)和(He)放(Fang)声(Sheng)系(Xi)统(Tong)两(Liang)大(Da)类(Lei)：(?)

1.扩(Kuo)声(Sheng)系(Xi)统(Tong)

扬(Yang)声(Sheng)器(Qi)与(Yu)话(Hua)筒(Tong)处(Chu)于(Yu)同(Tong)一(Yi)声(Sheng)场(Chang)内(Nei)，(?)存(Cun)在(Zai)声(Sheng)反(Fan)馈(Kui)和(He)房(Fang)间(Jian)共(Gong)振(Zhen)引(Yin)起(Qi)的(De)啸(Xiao)叫(Jiao)，(?)失(Shi)真(Zhen)和(He)振(Zhen)荡(Dang)现(Xian)象(Xiang)。(?)要(Yao)保(Bao)证(Zheng)系(Xi)统(Tong)稳(Wen)定(Ding)和(He)正(Zheng)常(Chang)运(Yun)行(Xing)，(?)最(Zui)高(Gao)可(Ke)用(Yong)的(De)系(Xi)统(Tong)增(Zeng)益(Yi)比(Bi)发(Fa)生(Sheng)声(Sheng)反(Fan)馈(Kui)自(Zi)激(Ji)的(De)临(Lin)界(Jie)增(Zeng)益(Yi)低(Di)6Db。(?)

2. 放(Fang)声(Sheng)系(Xi)统(Tong)

系(Xi)统(Tong)中(Zhong)只(Zhi)有(You)磁(Ci)带(Dai)机(Ji)，(?)光(Guang)盘(Pan)机(Ji)等(Deng)声(Sheng)源(Yuan)，(?)没(Mei)有(You)话(Hua)筒(Tong)，(?)不(Bu)存(Cun)在(Zai)声(Sheng)反(Fan)馈(Kui)可(Ke)能(Neng)，(?)声(Sheng)反(Fan)馈(Kui)系(Xi)数(Shu)为(Wei)0，(?)是(Shi)广(Guang)播(Bo)系(Xi)统(Tong)一(Yi)个(Ge)特(Te)例(Li)。(?)

现(Xian)代(Dai)化(Hua)建(Jian)筑(Zhu)的(De)公(Gong)共(Gong)广(Guang)播(Bo)系(Xi)统(Tong)根(Gen)据(Ju)建(Jian)筑(Zhu)规(Gui)模(Mo),使(Shi)用(Yong)性(Xing)质(Zhi)和(He)功(Gong)能(Neng)要(Yao)求(Qiu)可(Ke)分(Fen)以(Yi)下(Xia)三(San)种(Zhong)类(Lei)型(Xing):

⑴(?) 业(Ye)务(Wu)性(Xing)广(Guang)播(Bo)系(Xi)统(Tong)

⑵(?) 服(Fu)务(Wu)性(Xing)广(Guang)播(Bo)系(Xi)统(Tong)

⑶(?) 火(Huo)灾(Zai)事(Shi)故(Gu)广(Guang)播(Bo)系(Xi)统(Tong)

室(Shi)外(Wai)广(Guang)播(Bo)

主(Zhu)要(Yao)用(Yong)于(Yu)体(Ti)育(Yu)场(Chang)、(?)车(Che)站(Zhan)、(?)公(Gong)园(Yuan)、(?)艺(Yi)术(Shu)广(Guang)场(Chang)、(?)音(Yin)乐(Le)喷(Pen)泉(Quan)等(Deng)。(?)它(Ta)的(De)特(Te)点(Dian)是(Shi)服(Fu)务(Wu)区(Qu)域(Yu)面(Mian)积(Ji)大(Da)，(?)空(Kong)间(Jian)宽(Kuan)广(Guang)。(?)背(Bei)景(Jing)噪(Zao)声(Sheng)大(Da)；(?)声(Sheng)音(Yin)传(Chuan)播(Bo)以(Yi)直(Zhi)达(Da)声(Sheng)为(Wei)主(Zhu)；(?)要(Yao)求(Qiu)的(De)声(Sheng)压(Ya)级(Ji)高(Gao)，(?)如(Ru)果(Guo)周(Zhou)围(Wei)有(You)高(Gao)楼(Lou)大(Da)厦(Xia)等(Deng)反(Fan)射(She)物(Wu)体(Ti)，(?)扬(Yang)声(Sheng)器(Qi)布(Bu)局(Ju)又(You)不(Bu)尽(Jin)合(He)理(Li)，(?)声(Sheng)波(Bo)经(Jing)多(Duo)次(Ci)反(Fan)射(She)而(?)形(Xing)成(Cheng)超(Chao)过(Guo)50ms以(Yi)上(Shang)的(De)延(Yan)迟(Chi)，(?)会(Hui)引(Yin)起(Qi)双(Shuang)重(Zhong)声(Sheng)或(Huo)多(Duo)重(Zhong)声(Sheng)，(?)严(Yan)重(Zhong)时(Shi)会(Hui)出(Chu)现(Xian)回(Hui)声(Sheng)等(Deng)问(Wen)题(Ti)，(?)影(Ying)响(Xiang)声(Sheng)音(Yin)的(De)声(Sheng)像(Xiang)定(Ding)位(Wei)。(?)室(Shi)外(Wai)系(Xi)统(Tong)的(De)音(Yin)响(Xiang)效(Xiao)果(Guo)还(Huan)受(Shou)气(Qi)候(Hou)条(Tiao)件(Jian)、(?)风(Feng)向(Xiang)和(He)环(Huan)境(Jing)干(Gan)扰(Rao)等(Deng)影(Ying)响(Xiang)。(?)

室(Shi)内(Nei)广(Guang)播(Bo)

是(Shi)应(Ying)用(Yong)最(Zui)广(Guang)泛(Fan)的(De)系(Xi)统(Tong)，(?)包(Bao)括(Kuo)各(Ge)类(Lei)影(Ying)剧(Ju)院(Yuan)、(?)体(Ti)育(Yu)场(Chang)、(?)歌(Ge)舞(Wu)厅(Ting)等(Deng)。(?)它(Ta)的(De)专(Zhuan)业(Ye)性(Xing)很(Hen)强(Qiang)，(?)既(Ji)能(Neng)非(Fei)语(Yu)言(Yan)扩(Kuo)声(Sheng)、(?)又(You)能(Neng)供(Gong)各(Ge)类(Lei)文(Wen)艺(Yi)演(Yan)出(Chu)使(Shi)用(Yong)，(?)对(Dui)音(Yin)质(Zhi)的(De)要(Yao)求(Qiu)很(Hen)高(Gao)，(?)系(Xi)统(Tong)设(She)计(Ji)不(Bu)仅(Jin)要(Yao)考(Kao)虑(Lu)电(Dian)声(Sheng)技(Ji)术(Shu)问(Wen)题(Ti)，(?)还(Huan)要(Yao)涉(She)及(Ji)建(Jian)筑(Zhu)声(Sheng)学(Xue)问(Wen)题(Ti)。(?)房(Fang)间(Jian)的(De)体(Ti)形(Xing)等(Deng)因(Yin)素(Su)对(Dui)音(Yin)质(Zhi)有(You)较(Jiao)大(Da)影(Ying)响(Xiang)。(?)