Fans too loud

[Triumph]

I believe I have 5 fans in my current pc case, and even with some of them being fairly quiet, the ambient noise level is extremely high. At one point I had tried a ridiculous volcano fan, but it sounded like a vacuum cleaner was running 24x7.

My question is, is there a way to significantly lower the overall fan noise, but still maintain a high level of cooling. I am not overclocking, but I am in a room with a relatively high ambient temperature.