We’re not talking about me. We’re talking about what you said, that “the Pi4 is a noisy small general purpose computer.” I don’t know why you say that. I don’t know whether to believe that or not. I doubt it, but I’d like to keep an open mind. Do you have any evidence to back that up?
Perhaps you believe that to be the case, but it doesn’t appear to actually be the case. Take a look at these measurements.