The utility model discloses a double noise reduction sound device, which mainly solves the problems of complicated structure and high cost existing in the prior art in order to reduce the noise of the audio device. The dual noise reduction device includes a non inverting input terminal of pronunciation, connected with the operational amplifier T1 resistor R1 and capacitor C1, C4 capacitor connected to the inverting input end of the operational amplifier T1, a resistor R2 and a resistor R3 input and output terminals are respectively connected with the capacitor C4, between the output and the inverting input is connected to the operation the amplifier of the T1 resistor R5, an inductor L2 and a capacitor C3, a capacitor C3 in parallel with the capacitor C9, a resistor R11 and a capacitor C10, inductance L1 between the input end is connected to the capacitor C9 and the capacitor C10, connected with the inductance of the L1 audio amplifier circuit, filter circuit connected with the audio amplifier. The utility model has the advantages of good anti-interference ability and low cost, and has high practical value and popularization value.
【技术实现步骤摘要】
【技术保护点】
双重降噪发音装置，其特征在于，包括同相输入端连接有电阻R1和电容C1的运算放大器T1，与运算放大器T1的反相输入端相连的电容C4，分别连接于电容C4的输入端和输出端的电阻R2和电阻R3，均连接于运算放大器T1的输出端和反相输入端之间的电阻R5、电感L2和电容C3，均与电容C3并联的电容C9、电阻R11和电容C10，连接于电容C9和电容C10的输入端之间的电感L1，同相输入端通过依次相连的电阻R7、电容C6和电阻R6与电阻R11的输入端相连的运算放大器T2，输出端通过喇叭U1与运算放大器T2的输出端相连的运算放大器T3，均连接于运算放大器T3的同相输入端和反向输入端之间的电感L3和电容C11，所述电感L3和运算放大器T3的同相输入端之间还连接有电感L4。
【技术特征摘要】
【专利技术属性】
技术研发人员：黄欢，
申请(专利权)人：成都果范创想科技有限公司，
类型：实用新型
国别省市：
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