The speaker is a speaker interface. This interface is very small and usually consists of 4 small interfaces. The speaker is actually an electroacoustic transducer. When the current flows, the voice coil in the magnetic gap composed of magnets generates an upward and downward driving force to vibrate the vibrating body (vibrating membrane), thus vibrating the air. The sound spreads.
Interface generally refers to an abstraction that an entity provides to the outside world (it can be another entity), which is used to separate external communication methods from internal operations so that it can be modified internally without Affects the way other entities in the outside world interact with it, just like the multiple abstractions provided by object-oriented programming.
Interfaces may also provide some sense of translation between entities that speak different languages, such as humans and computers. Because the interface is an indirect method, it will cause some extra burden compared to direct communication. The interface between humans and information machines such as computers or between humans and programs is called user interface. The interface between hardware components of information machines such as computers is called hardware interface. The interface between software components of information machines such as computers is called software interface. USB interface: Mouse, camera, and USB flash drive are all devices that use USB interface. If you want to use them, they must be connected to the USB interface. The interfaces of these devices must comply with the USB interface specifications before they can be used through the USB interface.
Extended information:
Add a microphone device--first open the "This PC" application, then click the "Open Settings" button above, then click the "System" option, and click on the left after entering "Sound" option, then select the input device, and finally add the microphone so that you can use the microphone to make calls.
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