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1、声学&扬声器Sales&App.DepartmentSales&App.DepartmentCain GuCain GuSemiconductors PSS Beijing,25/11/20052主要内容电声器件的工作原理腔体对扬声器的影响失真对扬声器的影响Semiconductors PSS Beijing,25/11/20053电动式扬声器结构支架振膜导磁上板磁铁音圈导磁下板定心支片导磁芯柱Semiconductors PSS Beijing,25/11/20054电动式扬声器结构扬声器分解为：磁路系统，振动系统和支撑系统磁路系统振动系统Semiconductors PSS Beijing
2、,25/11/20055工作原理NSIBF=IBSemiconductors PSS Beijing,25/11/20056频响曲线Semiconductors PSS Beijing,25/11/20057自由振动振动系统所需条件：质量块，弹性形成振动所需条件：能量Semiconductors PSS Beijing,25/11/20058强迫振动振动系统稳定以后按照强迫力的频率振动当强迫力频率与固有频率相近时，发生共振Semiconductors PSS Beijing,25/11/20059位移、速度、加速度位移曲线 速度曲线 加速度曲线共振频率Semiconductors PSS Be
3、ijing,25/11/200510后腔对扬声器的影响Semiconductors PSS Beijing,25/11/200511为什么使用障板，后腔Semiconductors PSS Beijing,25/11/200512前腔对扬声器的影响Semiconductors PSS Beijing,25/11/200513泄漏对扬声器的影响湍流Semiconductors PSS Beijing,25/11/200514泄漏的改善密封圈confidentialSemiconductors PSS Beijing,25/11/200515结构振动Semiconductors PSS Beijing,25/11/200516倒相结构Semiconductors PSS Beijing,25/11/200517扬声器失真100mW300mWSemiconductors PSS Beijing,25/11/200518电信号失真Semiconductors PSS Beijing,25/11/200519直流偏置Thank you!Philips Sound Solutions