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Author SPL???
baza31
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Registered: 19th Apr 03
Location: yorkshire
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26th Apr 03 at 22:36   View User's Profile U2U Member Reply With Quote
Can someone explain SPL for me plz
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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26th Apr 03 at 22:42   View User's Profile U2U Member Reply With Quote
lol one thing after another

SPL - Sound pressure levels

Basically how loud you car goes, higher db, louder the system.
CRB 553
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Registered: 5th Apr 02
Location: NE Drives: Punto GT
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28th Apr 03 at 15:36   View User's Profile U2U Member Reply With Quote
u'll here people mention decibels (db), thats the pressure level reached inside a particular volume.....basically as austin said, higher = louder!
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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28th Apr 03 at 20:31   View User's Profile U2U Member Reply With Quote
for every 3dB gain the loudness has doubled.

so 89 dB is twice 86 dB
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
User status: Online
29th Apr 03 at 21:22   View User's Profile U2U Member Reply With Quote
not so, its a sliding scale. At about 140dB, 3 dB increase is double in volume, but at 177dB, 0.2dB is double in volume. Understand?
baza31
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Registered: 19th Apr 03
Location: yorkshire
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30th Apr 03 at 19:09   View User's Profile U2U Member Reply With Quote
thanks ppl
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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30th Apr 03 at 20:21   View User's Profile U2U Member Reply With Quote
so its every 3 db upto which point?

as far as im aware and my course notes say every 3db it doubles.
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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30th Apr 03 at 20:21   View User's Profile U2U Member Reply With Quote
but im only going on that, you probably know more than me, lol
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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30th Apr 03 at 20:29   View User's Profile U2U Member Reply With Quote
trying to find a graph at the moment. It is for this reason, new world records go up 0.1dB at a time. Its so hard to get that extra something from a sound system.
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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30th Apr 03 at 20:47   View User's Profile U2U Member Reply With Quote
fair enough,
Fear
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Registered: 20th Nov 02
Location: Down off the hill
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30th Apr 03 at 21:30   View User's Profile U2U Member Reply With Quote
Isnt it true that above a certain db(maybe 140 i think i heard) you have to double the amount of power in the system to get like 1 more bd of some quite small gain anyway???
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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30th Apr 03 at 21:51   View User's Profile U2U Member Reply With Quote
thats wot i mean by it being on a sliding scale, like i said, at about 140dB, a 3dB increase is a double in volume or double in power. Beyond that, it starts getting a little more tricky.

Kris, couldnt find any graphs.
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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30th Apr 03 at 21:54   View User's Profile U2U Member Reply With Quote


like the end of this graph,sorta thing. understand??
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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30th Apr 03 at 22:20   View User's Profile U2U Member Reply With Quote
ah i see, after 140, that makes sense, cheers for that, learn something every day
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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30th Apr 03 at 22:33   View User's Profile U2U Member Reply With Quote

corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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30th Apr 03 at 22:53   View User's Profile U2U Member Reply With Quote
thats what ive been looking for, for about 2 hrs! Where did you find it?
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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30th Apr 03 at 23:00   View User's Profile U2U Member Reply With Quote
http://www.anandtech.com/printarticle.html?i=1317
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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30th Apr 03 at 23:12   View User's Profile U2U Member Reply With Quote
how long did it take u to find that then?
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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30th Apr 03 at 23:49   View User's Profile U2U Member Reply With Quote
lol bowt 15 mins

just typed in decibel curve or something on google
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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1st May 03 at 00:01   View User's Profile U2U Member Reply With Quote
git
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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1st May 03 at 00:55   View User's Profile U2U Member Reply With Quote
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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1st May 03 at 01:03   View User's Profile U2U Member Reply With Quote
u seen marks(corsasri16v) new install?
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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1st May 03 at 11:38   View User's Profile U2U Member Reply With Quote
yup i av and the fcukin huge amp u getting....... git
J da Silva
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Registered: 10th Apr 03
Location: The FACTory
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3rd May 03 at 10:54   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by baza31
Can someone explain SPL for me plz



scottish premier league
DaveC
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Registered: 29th Mar 02
Location: Buckinghamshire
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4th May 03 at 16:19   View User's Profile U2U Member Reply With Quote
Exponential curve that is, takes alot of effort to get above 150db

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