how do we hear the amplified sound?
选项:
A:Sound waves are picked up by a speaker and converted to a small analog voltage called the audio signal,then the voltage are sent to the microphone.
B:Sound waves are picked up by a microphone and converted to a small analog voltage called the audio signal,then the voltage are sent to the speaker.
C:Sound waves are picked up by a microphone and converted to a small digital voltage called the audio signal,then the digital voltage are sent to the speaker.
发布时间:2024-05-12 21:32:27