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在课本图9.1-3话筒和听筒中,同学们看到了电话的基本结构示意图.当电话不工作时,即没有拿起话筒和听筒时,电话的电路处于待工作状态.当你打电话时,即拿起话筒和听筒时,电话的电路处于工作状态.现在让我们从你打电话的全过程来分析电话的传声过程:第一步:你对着话筒说话,你口中传出的声波引起了附近空气的振动.空气把这种振动传递到膜片,使膜片也发生了和声波振动情况完全一样的振动.第二步:膜片的振动使话筒中碳粒的松紧程度发生了变化.碳粒是一种导体,它的电阻
In the textbook 9.1-3 Microphone and handset, the students saw the basic structural diagram of the phone. When the phone is not working, that is, when the handset and handset are not picked up, the circuit of the phone is waiting for work. When you call, The circuit of the phone is working when you pick up the handset and handset. Now let us analyze the process of the phone’s voice from the whole process of your call: Step 1: You speak into the microphone, and the sound waves from your mouth cause The vibration of nearby air. The air transmits this vibration to the diaphragm, causing the diaphragm to also undergo exactly the same vibration as the vibration of the acoustic wave. Step 2: The vibration of the diaphragm changes the tightness of the carbon particles in the microphone. A carbon particle is a conductor whose resistance