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解決自激嘯叫的維修方法

更新時間:2014-06-11 14:51:05 作者: 來源:

HUWAIYANCHUHEGEWUTINGSUOSHIYONGDEZHUANYEYINXIANG,DUOSHUWEIJINKOUSHEBEI,YINGGAISHUOKEKAOXINGJIAOGAO。ZHUYAOWENTISHICAOZUOZHEZHUANYESUZHIBUQI,ZHENZHENGPEIBEIHEGEDIAOYINSHIDEDANWEIHENSHAO。BENWENZHENDUIZHONG、XIAOXINGGEWUTINGYINXIANGSHEBEICAOZUOYAODIANJINXINGJIESHUO,KEZUOWEIZHIDINGCAOZUOGUICHENGDECANKAO。LINGWAI,ZAIZHONGXIAOXINGGEWUTINGYOUYUHUATONGSHENGFANKUIZAOCHENGDEZIJIXIAOJIAOXIANXIANG,SHICHANGJIANDELINGSHIYONGZHETOUTENGDEWENTI,YINWEIJINGCHANGCHUXIANXIAOJIAOHUILINGBINKESAOXING,YINXIANGXIAOGUOWUCONGTANQI,YANZHONGZHEHUIZAOCHENGSHEBEISUNHUAI。SUOYI,ZIJIXIAOJIAOXIANXIANGSHIGEWUTINGYINXIANGSHIYONGZHONGDEYIGEZHONGYAOWENTI,XIAMIANFENBIEXUSHU。

音響設備開、關機順序

YINGANYOUQIANDAOHOUSHUNXUKAIJI,JIYOUYINYUANSHEBEI(CDJI、LDJI、DVDJI、LUYINJI、LUXIANGJI)、YINPINCHULISHEBEI(YAXIANQI、JILIQI、XIAOGUOQI、FENPINQI、JUNHENGQIDENG)DAOYINPINGONGLVFANGDAQIDAODIANSHIJI、TOUYINGJI、JIANSHIQI。GUANJISHISHUNXUXIANGFAN,YINGXIANGUANGONGFANG。ZHEYANGCAOZUOKEYIFANGZHIKAI、GUANJIDUISHEBEIDECHONGJI,FANGZHISHAOHUIGONGFANGHEYANGSHENGQI。

調試

1.GONGFANGDEYINLIANGKONGZHIDIANWEIQIYILVDIAODAOZUIDAWEIZHI;DIAOYINTAISHANGBANZOUYINLEHEHUATONGFENLUTUIZIYINGZHIYU0dB;DIAOYINTAISHANGGEFENLUGAINSHURUZENGYIJUNFANGZAIYIDIAOHAODEWEIZHI;DIAOYINTAIZONGYINLIANGTUIZIXIANZHIYUZUIXIAOWEIZHI(XIADUAN);DIAOYINTAIYINZHIBUCHANGXUANNIUJUNFANGZAIZHONGJIANWEIZHI。

彩民交流论坛2.SHIYANBANZOUTONGDAO,YEJIUSHISHUO,YONGCDPANHUOLDPANFANGGEQUYINLE、JIANGDIAOYINTAIJIYANTIAOZIJUNMANTIAOTU,JINGDAO—6dBFUJIN,CISHIGESHENGHEBANZOUYINLEDAZHISHIZHENGCHANGGONGZUOSHIDEYINLIANG;DANYAOZHUYIYINLIANGYAOSHIDUYUEER,XIANGDUGUODAYISHIRENPILAOHENANYIRENSHOU。DIAOYINYUANYINGDAOTINGNEIBUTONGWEIZHILINGTINGXIAOGUO。RULITISHENGYINXIANG、LEQUYINZHIDENG。SUOFANGDEQUMUYINGSHIZIJISHUXIDEQUZI,KEFANFUDIAOZHENGYINLIANG(DIAOFENLUGAINZENGYI)HEFENLUYINZHIBUCHANG,ZHIDAOYINXIAOMANYIWEIZHI。DUIYINLEXIAOGUODEYAOQIUYINGSHIYOULIDU、YOUMEIGAN,GAOYINBUNENGCIER,DIYINBUNENGHUNZHUO,YAOQIUGESHENGQINGCHU,RUNVSHENGDECHIYINQINGXIKEWEN.DANBUKEGUOZHONG。FENLUTUIZIZHIYU0dB,ZONGYINLIANGTUIZIZHIYU0dB,DIAOJIEFENLUGAINSHURUZENGYINIUSHIAUBIAOZHISHI0dBZUOYOU,CISHIXITONGDADAOEDINGSHUCHUGONGLV。DANZHENGCHANGGONGZUOSHI,ZONGYINLIANGTUIZI—BANDIAOZAI—6dBHUO—10dBYIXIA,XIAOYUEDINGSHUCHUGONGLV。

彩民交流论坛3.SHIYANHUATONGTONGDAO。YIBANLAISHUO,ZHISHAOYAOZHUNBEILIANGGEHUATONGTONGDAO。XIANSHIHUATONGLINGMINDUHEDONGTAIXINGNENG,RANHOUJIASHANGHUNXIANGHEBANZOUYINLECHANGGE,GESHENGJINGGUOHUNXIANGCHULI,YINGGAIBIYUANGESHENGYINSEGENGJIAYUANRUN、FENGMANHEYOUCENGCI,FUYOUXIANCHANGGAN。HUATONGYINLIANGDEDIAOJIE:FENLUTUIZIZHIYU0dB,HUATONGYINLIANGDIAOZHENGFENLUGAINSHURUZENGYINIU,YIFENLUFENGZHIDIANPINGZHISHIDENGOUERSHANLIANGWEIHAO,ZONGSHUCHUGONGLVDEJILIANGKAOAUBIAOZHISHI。

4.DUIXIAOLEDUIJINXINGSHIYINDIAOZHENG,JIYAODUIGEZHONGLEQIDEHUATONGTAIYINHEDIANXINHAOJINXINGSHIYIN,GENJULEQUFENGGEJINXINGYINXIANGBILIPINGHENG。

5.SHIPINTUXIANGDEDIAOZHENG,JITOUYINGJIHECAIDIANYINGTONGGUODIAOZHENGQILIANGDU、DUIBIDU、SEBAOHEDUDENGXUANNIUSHIQITUXIANGQINGXI、SECAIYANLI。YINXIANGYUANYINGNENGSHULIANDISHIYONGYINGDIEJIHEDIANGEQI,SHUXIDIANGEDANSHANGDEPANWEI。ZHUYIZAIZHENGSHIYANCHANGSHI,YINGANYINGDIEJISHANGDED/AJIAN。XIAODIAOYUANCHANGGESHENG。

音頻處理設備的調整

1.房間均衡器

FANGJIANJUNHENGQIYOULIANGGEZUOYONG,YISHIDIAOJIEYINZHI,MIBUTINGNEIHUNXIANGSHIJIANZAOCHENGDEPINXIANGBUPINGHENG;LING—GEZHONGYAOZUOYONGSHIYADIMOUYIPINDUAN,YIZHISHENGFANKUIZAOCHENGDEXIAOJIAOSHENG。FANGJIANJUNHENGQIPINGSHISUOYINGBAOCHIYINXIANGGONGCHENGDIAOSHISHIDIAODINGDEWEIZHI。

2.壓限器

ZAIYINXIANGGONGCHENGZHONGYAXIANQIYESHIZHONGYAOSHEBEI,QIZUOYONG:YISHIYASUOHUOXIANZHIJIEMUDEDONGTAIFANWEI,FANGZHIGUOZAIHUOSHIZHEN,DUIGONGFANGHEYANGSHENGQIJUYOUBAOHUZUOYONG;LINGYIZHONGYAOZUOYONGSHITIGAOJIEMUXIANGDU(ZHEKEYIKAOTINGJUEMINGXIANDEGANSHOUDAO)。

壓限器的調整數據如下

(1)ZAOSHENGMENGATE:ZHISHIDENGLIANGSHIZAOSHENGMENGUANBI,SHENGYINXIAO。QIDAOJINGZAOZUOYONG。DANGSHURUXINHAOJIANGLUODAOMENXIANDIANPINGSHIJIKAISHIGUANBI,ZAOSHENGMENYIBANZHIYU0PENDAO—20dBZHIJIAN。

(2)YASUOMENXIANDIANPINGTHRESHOLD:JUEDINGKAISHIYASUODEDIANPING,YIBANZHIYU-10DAO0dB,KAISHIYASUOSHIZENGYIJIANXIAO,GAIN REDUOTION(dB)ZHISHIDENGKAISHILIANG。

彩民交流论坛YASUOBIRATT0:ZHIYU2:1;

DONGZUOSHIJIANATTACK:ZHIYU10ms;

彩民交流论坛SHIFANGSHIJIANRELEASE:ZHIYUO.3s。

3.混響器

彩民交流论坛MUQIANGUANGFANSHIYONGSHUZIHUNXIANGQI。ZHELEIJIQINEIBUGUHUALEXUDUOBUTONGDEHUNXIANGXIAOGUOYIGONGXUANZE。DIAOYINYUANYINGDUISUOSHIYONGDEHUNXIANGQIDEGEZHONGHUNXIANGXIAOGUOZHUGESHICHANGSHITING,JILUKEYISHIYONGDECHENGXU,ZAIDIAOYINSHIKESUISHIYONGJIZHONGJIANPANDIAOCHUSHIYONG。

調音要點(以操作調音臺為主)

彩民交流论坛1.GETINGDIAOYINYUANGONGZUOZAIKONGZHISHINEI,DIAOYINSHIYINGSHIYONGJIANTINGJIANTINGYINXIANGHEJIANTINGERJI,FENBIEJIANTINGZHUTONGDAOHEFANTINGTONGDAO。DIAOYINYUANYINGSHUZHIJIANTINGYINHEXIANCHANGYINDEGUANXI,YINZHIDIAOZHENGHENDACHENGDUSHANGYIKAOGERENDETINGJUE。

2.SHIYONGYAXIANQIHEJILIQIYIZENGJIASHENGYINDEXIANGDUHEMEIGAN。JILIQIDEDIAOZHENGZHUYAOKAOTINGJUE,YINGANSHEBEISHIYONGSHUOMINGSHUJIANGSHENGYINDIAODEFENGMANYUEER。

彩民交流论坛3.YONGHUNXIANGMEIHUAGESHENG。DUIFEIZHUANYEGECHANGZHEYINGSHIDANGJIAZHONGHUNXIANG,YIYANGAIZAOYINHEFASHENGZHONGDEQUEXIAN。

彩民交流论坛4.YINLIANGXIAOSHIZHUYITISHENGDIPINHEGAOPIN;YINLIANGDASHISHIDANGTISHENGZHONGPIN,YIZENGQIANGSHENGYINDEMINGLIANGDU。

彩民交流论坛5.DIAOYINYIGESHENGWEIZHU。DANGGESHENGCHUXIANZHIQIAN,BABANZOUJIANJIANYADIXIALAI,YITUCHUGESHENG。DIPINYINGSHUAIJIAN3—5dB,GAOPIN7kHzYISHANGDEYINGSHUAIJIAN3dB,ZHONGDIPIN200Hz FUJINTISHENGKEJIADALIDU,2—4kHzTISHENG3-6dBKEYIMINGXIANGANDAOGESHENGMINGLIANG。DUIDISIKEHUOYAOGUNLEZEYAOZHUYIJIAODAFUDUDITISHENGDIPIN(40—100Hz)HEGAOPIN(7— 20KHz)。

彩民交流论坛6.TISHENGDIYINSHIQIEBUKEMENGXUANBUCHANGNIU,YIMIANYINGONGLVSHUCHUGUODAERSUNHUAIGONGFANGHEYANGSHENGQI。DUIJUNHENGQIDEDIPINDIAOJIETONGYANGRUCIYAOQIU。

7.RUGUOFASHENGSHENGSHENGFANKUIXIAOJIAOSHENG,YINGXUNSUJIANGWEIYINTAIZONGYINLIANGTUIZIXIALAYIQUDIAOXIAOJIAOSHENG,ZHAOCHUYUANYINHOUZAIZHUBUTUISHANG。

8.ZHUTONGDAOFASHENGGUZHANGBUNENGFANGSONGSHI,KEJIANGFANTINGYINXIANGDEXUANZHUANJIAODULINSHIDAITIZHUTONGDAO,SHIYANCHANGDEYIJIXUJINXING。GONGYANCHANGYONGDEHUATONG,YINGYOUBEIFEN,DANGHUATONGWUSHENGSHIKEYONGBEIFENTIDAI。YINGDIEJIYEYINGYOUBEIFEN,DANGYINGDIEJIFASHENGGUZHANGSHIKEYONGBEIFENTIDAI。

聲反饋(嘯叫聲)的抑制

1.HUATONGSHENGFANKUIZAOCHENGDEZIJIXIAOJIAOSHENGSHIGETINGHEKALA0KTINGDECHANGJIANXIANXIANG,YOUYUCUNZAISHENGFANKUI,YIBANKUOYINXITONGZENGYIDOUBUNENGHENDA。FASHENGSHENGFANKUIXIAOJIAODEYUANYINSHI:

(1)HUATONGJUYINXIANGTAIJIN,HUATONGZHENGXIANGZHIXIANGYINXIANG。

(2)DIAOYINTAISHANGHUNXIANGDIAOJIEGUODA。

(3)HUATONGYINLIANGDIAOJIEGUODA。

彩民交流论坛(4)MEIYOUJIETONGYAXIANQI。

(5)TINGNEISHENGXUESHEJIQUEXIAN。

2.針對以上原因可采取以下措施:

彩民交流论坛(1)WEIYANCHANGZHEDEHUODONGWUTAIXIANDINGYIGEDAZHIDEFANWEI,ZAICIFANWEINEIBUYINGFASHENGXIAOJIAOSHENG。YEJIUSHISHUO,YANCHANGZHEBUYINGTAIKAOJINZHUYINXIANG,ZHUYINXIANGYINGDUICHENGYUWUTAILIANGCE;YANCHANGZHEDEZHANWEIBUYINGSHIHUATONGZHENGXIANGZHIXIANGYINXIANG。

(2)GETINGDEWUTAIYINGJINXINGSHENGXUECHULI,QIANGMIANHELIANGCEYINGZHUANGXIYINCAILIAO。

彩民交流论坛(3)JIETONGYAXIANQI,QIYASUOBIYINGSHEZHIWEI<=2:1,DONGZUOSHIJIANWEI10ms,SHIFANGSHIJIANWEI0.3s。

(4)DIAOYINTAISHANGDEHUNXIANGDIAOJIEHEYINLIANGBUYAOKAIDEGUODA。

彩民交流论坛(5)YISHANGCUOSHIBUNENGZOUXIAOSHI,KETONGGUODIAOJIEJUNHENGQI,DUIYICHANSHENGXIAOJIAODEPINLVJIAYISHUAIJIAN。

具體操作方法如下:

JIANGJUNHENGQIGEPINDIANWEIZHIXIANZUOHAOJILU;RANHOU,SHIFANYAN。JIADAYINLIANG(YONGDIAOYINTAIZONGTUIZIDIAOJIE),DAOXITONGGANGHAOCHANSHENGZIJIDEWEIZHI,JIANGJUNHENGQISHANGDEDIAOJIENIUCONGDIPINKAISHIZHUGEXIADIAO,NENGGOUYOUXIAOXIAOCHUZIJIXIAOJIAODEPINDIAN,GENJUJINGYANYIBANZHIYOUYIGEZIJIXIEZHENPINLV(RU250Hz),CIPINLVFUJINKEXIALA3—5dB,QIYUPINDIANRENGYINGBAOCHIYUANXIANJILUDEWEI。