Hearing aid

I am currently working on a school project, diagram is attached below.
The diagram is a hearing aid which I got from a site.
But I would like you guys to help make modifications on the circuit, any kind of modifications at all, modification that would make it have a cleaner clearer sound most especially. Secondly, I do not know the use of the components C3, C4, C9, C10, R5, and R6 and why those values, any mathematics behind them?
I guess it is suppose to be easy to understand, but I really don't get it.
I would appreciate any suggestion, comment or modification on the circuit, I would be online waiting for anybody. Thanks.

I have a question on how the value of the base and emitter voltage were gotten, I tried manipulating it but I couldn't get the values you arrived at.. And what is the 2 in 8K2, or is it just 8 kilo Ohms

That's not a hearing aid circuit.

Because a decimal point is so small, it can easily be missed or even lost due to printing flaws or aliasing. In amelioration the decimal point is replaced by the multiplier character: *R* for 0 (or no multiplication), *k* for 1000, *M* for 1 million, etc. Thus, 8k2 = 8.2k. BTW: 82.3Ω becomes 82R3

Another advantage is it makes the designation more compact.

This one is new to me, we don't see that around here where I come from, But its reasons are really reasonable, I like it.

Then what is it........

And how much exposure have you had, being the beginner that you are

It has various applications, none of which, as Colin pointed out, make sense for a hearing aid -- unless this is some sort of external hearing aid. It eats too much current for it to last long enough on hearing aid batteries. It would need larger batteries that would only fit in an external box.

@collin.. I went out today to get the components, but i did not find the 330pf capacitor, is there anything I can do, or another capacitor value to use? Secondly, the electrolytic capacitor voltages where not indicated, so I took some 16 Volts and others about 36 Volts.

Well not very much......