Noisy NVR

[Excalibur]

New NVR4208 with almost new 2TB HDD. Rather noisy.

So it has 2 little fans but OK am comparing to old generic fanless NVR (RIP) although HDD is same. Old one was a lot more stealth.

What can I do to reduce noise?

I recall rubber mounting fans in a PC many years ago and it made a useful difference. Another time I discovered bigger diameter fans were quieter.
What if I glued a patch of rubber sheet to the tin case?
I suppose it could be boxed but I want it to stay cool too.

 

[TonyR]

Lots of threads on that topic==>> site:ipcamtalk.com noisy nvr

 

[SpacemanSpiff]

Many hear have reported success replacing dead or noisy fans with noctua fans

 

[Flintstone61]

New NVR4208 with almost new 2TB HDD. Rather noisy.

So it has 2 little fans but OK am comparing to old generic fanless NVR (RIP) although HDD is same. Old one was a lot more stealth.

What can I do to reduce noise?

I recall rubber mounting fans in a PC many years ago and it made a useful difference. Another time I discovered bigger diameter fans were quieter.
What if I glued a patch of rubber sheet to the tin case?
I suppose it could be boxed but I want it to stay cool too.

Noctua Fans, Amazon. or direct site --->

Noctua

Noctua's premium fans are internationally renowned for their superb quietness, exceptional performance and thoroughgoing quality.

noctua.at

 

[Excalibur]

Thanks for the great thoughts.

Am looking at a number of ideas, thanks to TonyR Google search.

Installed a DB meter on my smartphone. Holding it to the rear of the NVR shows 50 -55db, more if I move toward the PSU fan... Anyway a good reference to test possible improvements.

A Noctua fan looks like a great fix. Cheapest on Ebay about $36 landed and about $21 from Aliexpress landed.

I recall noise reduction on a PC some years ago, a setting in bios had fans spinning to suit temperature. Worked great in winter but in mid summer full speed was best. Roll clock forward and a hand-me-down PC came my way. Wow, what a nice reduction in noise. That's technology for you. Yet another time I ran some 12v fans on 5v. A PC PSU has 5v supply so it was easy.

Studying....

 

[StevenFromTexas]

One of the first things I did after I purchased a network video recorder was replace both fans with the Noctua brand. The difference was amazing.

 

[Shockwave199]

The noise comes from the power supply fan. You can replace just that one with a noctua and seriously reduce noise. The smaller side fan isn't worth noodling with imo. That's not really where the bulk of the noise comes from.