This paper also design a speakercircuit to let more people can listen.
本文还设计了音箱电路，以便导游器可以群体收听。
2
Abstract: This design is a kind of design which based on the additional speaker circuits of the original car speakercircuit.
摘要：本设计是在原车喇叭电路的附加喇叭电路的基础上的一种设计。
3
The design of such a speakercircuit can solve the conflict between no-honking of citys in reality and the inherent speaker sound excessive or insufficient, and with good practical significance.