Audio oscillator circuit diagram with special functions

In today's electronic technology field, audio oscillators are not considered high-tech. However, due to their simple circuit, easy use, wide range of applications, and penetration into every corner of people's lives and work, it is very important to look at it from another angle. Is necessary.

Walking on the street, sitting at the office or at the conference table, when the BP machine rings, everyone will look at their own pagers. Because the beeping sound is the same, it is difficult to tell who is being paged. When the office phone rings, you pick up one receiver. If you hear something wrong, you put down one receiver and pick up another one. In an office with many telephones, you may need to repeat this action many times. This is a situation that everyone often sees or encounters. Is the audio oscillator difficult to use? Of course not, it's just that it's still hard to tell because the sounds produced by today's audio oscillators are almost the same. Can we "make up" some differences in the oscillations? The following introduces an audio oscillator with special functions, which will be of certain help.

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