noise


C

Cuprager

From a humans perspective, how loud is 68dB? Would it irritate you if
it was sat beside you, in the next room, 50 meters away from you?

TIA

Gerry
 
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G

Guy King

The message <ebpt99$3ag$1@dennis.cc.strath.ac.uk>
from Cuprager said:
From a humans perspective, how loud is 68dB? Would it irritate you if
it was sat beside you, in the next room, 50 meters away from you?
It would depend very much whether it was something I wanted to listen
to, of course!
 
T

The Grim Reaper

Something deep in my memory is telling me that 70 to 75 dB is the noise a
jet engine makes during take-off,
so I give it at least 200 metres!!
Of course I could be wrong - I'm getting old :S - tried googling it?!?!
_________________________________
The Grim Reaper
 
C

Cuprager

Lobster said:
According to
http://www.gcaudio.com/resources/howtos/loudness.html
68dB corresponds to normal conversation levels at 3'-5' so I guess the
answer to your question depends on who's doing the talking - Keira
Knightley or my mother-in-law?

David
Its the noise level of a generator that I am looking at... it will be
roughly 25m away from any house and about 3m away from me (through a
wall to the outside) so I just wondered HOW noisy/quiet that it would
seem - real world experience here, not google literature.

Thanks.

Gerry

For the record I think that I would put up with Keira at the 110dB mark :~)
 
D

dennis@home

Its the noise level of a generator that I am looking at... it will be
roughly 25m away from any house and about 3m away from me (through a wall
to the outside) so I just wondered HOW noisy/quiet that it would seem -
real world experience here, not google literature.
If you ran it at night or for hours on end near me it would end up in the
canal.
Would you want someone near you running a lawn mower for hours on end?
 
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R

Rumble

Cuprager said the following on 14/08/2006 15:50:
Its the noise level of a generator that I am looking at... it will be
roughly 25m away from any house and about 3m away from me (through a
wall to the outside) so I just wondered HOW noisy/quiet that it would
seem - real world experience here, not google literature.

Thanks.

Gerry

For the record I think that I would put up with Keira at the 110dB mark :~)
OK,

The 100kVA super-silenced generator we use for our festival is (during
the daytime) inaudible at about 7m distance - i.e. you can't hear it
over the ambient noise (this is before the "loud" bands come on in the
evening by the way). You can stand next to it an hold a (nearly) normal
conversation. Obviously, the higher the load, the louder it is.

We run it all night and get no complaints. The nearest people sleeping
to it are in a tent about 25m away.

If your bedroom window is double glazed and it's only idling, I expect
you would be able to hear it, but it would be quieter than, say, a
tranny van idling outside your bedroom window. If your window was open,
you'd be getting the fumes from the exhaust ;-(

Smaller generators (e.g. 20kVA road-towable from HSS) have have less
soundproofing and a higher-pitched note which is more intrusive.

HTH
 
L

Lobster

Its the noise level of a generator that I am looking at... it will be
roughly 25m away from any house and about 3m away from me (through a
wall to the outside) so I just wondered HOW noisy/quiet that it would
seem - real world experience here, not google literature.
Well surely the 68dB is totally meaningless without a distance - doesn't
the genny quote that along with the dB?

I mean, a jet plane taking off might be 120dB (or whatever) if you're
100 yards away, which might be more than a little loud, but if you're
100 miles away from it, the level will have fallen off to 0dB, and
somewhere between 0 and 100 miles from the airport the sound level will
have fallen to an "acceptable" level,. whatever dB value that might be.
If you get my drift!

David
 
D

Dave Plowman (News)

From a humans perspective, how loud is 68dB? Would it irritate you if
it was sat beside you, in the next room, 50 meters away from you?
It means very little unless you know what sort of 'dBs'. The human ear is
non linear to frequency, for example.
 
C

Cuprager

Lobster said:
Well surely the 68dB is totally meaningless without a distance - doesn't
the genny quote that along with the dB?

I mean, a jet plane taking off might be 120dB (or whatever) if you're
100 yards away, which might be more than a little loud, but if you're
100 miles away from it, the level will have fallen off to 0dB, and
somewhere between 0 and 100 miles from the airport the sound level will
have fallen to an "acceptable" level,. whatever dB value that might be.
If you get my drift!

David
Quite correct David, sorry I should have said - 68dB @ 7M.
 
C

Cuprager

dennis@home said:
If you ran it at night or for hours on end near me it would end up in the
canal.
Then you would end up following it in my friend :O)
Would you want someone near you running a lawn mower for hours on end?
I live in suburbia where lawnmowers DO run for hours on end!
 
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P

Peter Lynch

Its the noise level of a generator that I am looking at... it will be
roughly 25m away from any house and about 3m away from me (through a
wall to the outside) so I just wondered HOW noisy/quiet that it would
seem - real world experience here, not google literature.

Thanks.

Gerry

For the record I think that I would put up with Keira at the 110dB mark :~)
If you are primarily concerned with how irritating you would find it
3m away, you could always get some ear-defenders. If it's a cheap
generator then it's probably not rated to run 24*7, so as long as you
only run it for "reasonable" lengths of time - and not at unsociable
hours then hopefully no-one else would complain.

Pete
 
D

Dave Plowman (News)

If you are primarily concerned with how irritating you would find it
3m away, you could always get some ear-defenders. If it's a cheap
generator then it's probably not rated to run 24*7, so as long as you
only run it for "reasonable" lengths of time - and not at unsociable
hours then hopefully no-one else would complain.
The only reason I can see to use a generator is you're too far away from a
mains supply so that should include neighbours?

I'd not be pleased if someone next door was running a generator in their
garage etc at the end of their garden...
 
T

The Natural Philosopher

Peter said:
If you are primarily concerned with how irritating you would find it
3m away, you could always get some ear-defenders. If it's a cheap
generator then it's probably not rated to run 24*7, so as long as you
only run it for "reasonable" lengths of time - and not at unsociable
hours then hopefully no-one else would complain.

Pete
Or put the thing in a brick or block enclosure.

68dB is nothing in an urban environment, but is very noticeable in a
quiet country location.
 
C

Cuprager

The said:
Or put the thing in a brick or block enclosure.

68dB is nothing in an urban environment, but is very noticeable in a
quiet country location.
I had been considering this option but will wait and see how noisy it
turns out to be.

Cheers

Gerry
 
G

Guy King

The message <1155645251.29138.3@despina.uk.clara.net>
from The Natural Philosopher said:
68dB is nothing in an urban environment, but is very noticeable in a
quiet country location.
Late evening even in an urban environment that might be too much. A lot
of it is down to perception. I used to live in Hounslow, right under the
glidepath to Heathrow. The planes weren't a bother, but the pub behind
the house had an AC unit that hummed really annoyingly.
 
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P

Pinot Grigio

Would you want someone near you running a lawn mower for hours on end?
I live in suburbia where lawnmowers DO run for hours on end!
Reminds me of where I used to live. An old retired guy several doors down
bought himself a new lawnmower that sounded just like a dentist drill. He
only used it at weekends (to show it off?). I once had to use great
restraint not to pay him a visit one Saturday when I was having major dental
work done in the afternoon. To say I don't like dentists is an
understatement.
 

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