The Xbox 1 is purposely oversized

[ICStats]

theprof00 said:

ICStats said:

Right.  They have a gigantic fan.  But it's not the only reason.

- The XB1 has a lot more vent space than PS4 so there is more air getting to the fan.  PS4 runs at higher air pressure / speed needed through the vents.
- No heat from the power supply in the box.

I asked you to prove to me that open spaces (within a shell) means quieter.
PS4 is louder because it uses a smaller, higher-powered fan. More rpms means more 'whine'. This is all case-building 101.
a larger fan runs at much fewer rpms to provide the same cooling. Number of vents or air pressure makes no difference because the important part of that equation is that none of those vents are facing you.
Sound travels in the air, so if air was vented toward the player, then yes, higher air pressure would result in the internal sound getting to the player more consistently. But ps4 vents out the back at a downwards angle, and xb1 vents from all sides.
Regardless, I'd be more inclined to think that more space in a shell provides more acoustic resonance = amplified sound.

You didn't ask me to prove anything if I racall .

Again, I agree larger fans are quieter because they displace more air at a lower RPM.  But this is only part of the equation.

1) If you cover up most of your PC's vents then internal temperature will rise, temperature differential between heat sync and air drops, and the fan will need to operate at RPM to get the same cooling.  This should be obvious heat dissipation physics.
2) Smaller vents require higher pressure (so higher RPM) to achieve the same air flow.  This is also obvious physics.  In layman's terms it's the difference between breathing through your mouth and breathing through a straw.  It takes much higher pressure to breathe at the same speed.  PC form factors usually have plenty of ventilation so this is a small issue.  Xbox one has ventilation on the top surface and sides, while PS4 mostly on the back.  It has a bigger mouth, so to speak.
3) XB1's vents all over the top and sides give it more space to dissipate heat around it, so it fares better in an enclosure.  Again what I was mentioning is my XB1 is happy in my cabinet all the time, but PS4 is not at all.  PS4 runs much more quietly outside with clear space around it's rear vents.
4) When PS4 gets hot the air blows so fast that you can hear the sound of the air blowing.  Again, this is related to pressure.  It's not just directed away from you.