Comments on Profile Post by Elmer Danilovich

is that 43 dBA or 43 dBC. If the former, then yes, that is kind of loud for residual room noise.If the latter then you are doing about average for suburban environments, and not bad by the way.

My idle noise is apparently around 32 dB SPL (not sure if dBA or dBC). Right next to my desktop it's around 41 dB SPL. I'm actually surprised because I thought my room was louder.

Oh today it's right at like 39.7 dbA, I wonder what got quieter... might be the AC isn't on outside today

How did you measure that? Also I assume this is during the daytime, right? What does the noise consist of?

40dBA sounds pretty bad to me. Listening to music at 75dBA I measure 35dBA two rooms over! A normal door seems to bring about 20dB of isolation.

I think anyone claiming their ambient dBA is under 20dB is generally an idiot and checking middle octave at like 8kHz or higher or doesn't own a sufficiently sensitive mic. Do you own a refridgerator or have any home HVAC system? Do you have double paned windows or thinner?

I've been in an anechoic chamber in a basement far from a freeway and it was 11dBA and it was unnerving to be in there for longer than a few mins.

How did they measure the 11dBA figure? I kind of doubt it. Less sensitive mics will just have more noise, not less so I don't get what you mean by that.
A fridge that's two or three rooms over will probably be below the hearing threshold.

HVAC... Can you not turn those off? That would really suck.
Aren't double paned windows normal? From a quick measurement my roof window seems to isolate in the ballpark of 25+dB and that's a window with an area of almost a square meter.

You're an idiot. Two months for continually posting dumb shit that people take at face value because you don't know how acoustics actually work. Admins are all done with your half-assed posts.

54 dBC in the kitchen when my HVAC fan turns on in the room over (small open concept level). 57 dBC if I go into the room with the HVAC return. Add 3 dB if I set my meter to report "max" and subtract 3 dB for "min."

It's a cheap meter. My house is small and with a very compact layout. HVAC and return are all setup in such a way to be loud as hell when it comes on.

The old RS 3300099 is reliable to 30 dBA. I have several here and checked them all against the B&K 4231 and cross calibration at various SPL with ACO 7046 using pink noise through a Genelec 8030 at 25 cm. edit: at standard room temp only - accuracy reduced at other temperatures.

I have a Check Mate CM 140 that I mounted to measure my ambient figure, I will admit the fridge is sorta loud. Enough that I cut it off to shoot videos, can't do that for listening everyday tho

But I can get a consistent 39.4 - 39.8 reading in the middle of my office at night. 41.3-42 dBa during the day. [Also I rent]