高頻聲聽起來尖銳，當制(zhi)(zhi)動盤與制(zhi)(zhi)動片的振動頻率相同時(shi)，它們共振產生尖叫聲。檢查卡鉗：導(dao)軌是否(fou)(fou)(fou)潤滑順暢、活塞油(you)封(feng)有無損壞(huai)；所有防噪音夾子與制(zhi)(zhi)動片是否(fou)(fou)(fou)適合、安裝是否(fou)(fou)(fou)正確(que)；制(zhi)(zhi)動片是否(fou)(fou)(fou)太光滑、是否(fou)(fou)(fou)被過度使(shi)用。

一般稱(cheng)為(wei)卡(ka)鉗(qian)噪(zao)音，由(you)卡(ka)鉗(qian)組(zu)件震動(dong)造成，也可能由(you)于懸掛(gua)系(xi)統震動(dong)造成。新車(che)卡(ka)鉗(qian)或(huo)懸掛(gua)系(xi)統有(you)輕微的震動(dong)，清(qing)晨靈(ling)敏度(du)，如冬季清(qing)晨，尤其常見。檢查卡(ka)鉗(qian)、懸掛(gua)系(xi)統和襯(chen)套(tao)。

一般在踏板松弛(chi)情況下產生，易(yi)導致方向盤抖動(dong)。新車型(xing)容易(yi)產生這類問題，由制動(dong)盤厚度(du)差異造成(cheng)，維護球籠(long)連接(jie)件(jian)，檢(jian)查制動(dong)片磨損程(cheng)度(du)。

制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)磨損后異常，這是由于(yu)制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)表(biao)(biao)面臟(zang)，制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)材質(zhi)密度(du)不均(jun)勻，過高的工作溫度(du)，制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)安裝(zhuang)扭(niu)矩不匹(pi)配(pei)。檢(jian)(jian)查：更換制(zhi)(zhi)動(dong)(dong)(dong)片前必須(xu)檢(jian)(jian)查制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)；用卡尺檢(jian)(jian)查制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)厚(hou)度(du)；重新(xin)安裝(zhuang)固定制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)螺栓；測量(liang)制(zhi)(zhi)動(dong)(dong)(dong)盤(pan)(pan)工作表(biao)(biao)面平面度(du)。