Glossary entry (derived from question below)
English term or phrase:
dba re 1 pW [acoustics, sound pressure levels]
English answer:
dB [decibels], A-weighted, wrt [=with respect to] OR referred to 1 pW [1 picowatt, = 1/1,000,000,000,000 of a watt]
Added to glossary by
Tony M
Jul 6, 2004 08:36
19 yrs ago
34 viewers *
English term
Italy
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dba re 1 pW
English
Tech/Engineering
Mechanics / Mech Engineering
air conditioning
"noise: dba re 1 pW"
I know what dBA means but any idea as to what the the other abbreviations mean?
thanks!
"noise: dba re 1 pW"
I know what dBA means but any idea as to what the the other abbreviations mean?
thanks!
Responses
3 hrs
Selected
dBa with respect to / referred to...
... a reference level of 1 pico watt
It means that the sound pressure level you are dealing with is A-weighted, and is being expressed with reference to 1 pW -- a common baseline level for sound measurement.
It means that the sound pressure level you are dealing with is A-weighted, and is being expressed with reference to 1 pW -- a common baseline level for sound measurement.
4 KudoZ points awarded for this answer.
Comment: "thanks everybody!"
+2
6 mins
Ramesh Madhavan
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English
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, Tamil
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Related KudoZ points
:
24
Pico Watt
Pico is ten to the power minus 12. 1,000 Nano = 1 Micro. 1,000 Pico = 1 Nano. Noise can also measured/expressed in watts. Not sure what the "re" is but my guess will be "in the region of..".
Peer comment(s):
| agree |
sassa
: http://www.xs4all.nl/~rigolett/ENGELS/wg1/wg1-annex5.htm I think "re" is "reference (sound intensity)"
7 mins
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Thanks
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| agree |
Saleh Chowdhury, Ph.D.
8 mins
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Thanks
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| neutral |
Fox76 (X)
: what about "re = respectively" ??
34 mins
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'reference' is more like it. Yours respectively :-)
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+3
5 mins
airmailrpl
Brazil
Brazil
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Related KudoZ points
:
92
weighted sound power level
AC Blowers, AC Axial Fans, DC blowers, DC Axial Fans from Comair ...
... SPL is: SPL = LwA - 20log r - 0.6 + C SPL® "A" weighted Sound Pressure Level (dBA re 20 Pa) LwA ® "A" weighted Sound Power Level (dBA re 1 pW) r ® Radius ...
www.comairrotron.com/engineering_notes_06.asp
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Note added at 9 mins (2004-07-06 08:46:47 GMT)
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weighted sound power level of 1 pico watt
... SPL is: SPL = LwA - 20log r - 0.6 + C SPL® "A" weighted Sound Pressure Level (dBA re 20 Pa) LwA ® "A" weighted Sound Power Level (dBA re 1 pW) r ® Radius ...
www.comairrotron.com/engineering_notes_06.asp
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Note added at 9 mins (2004-07-06 08:46:47 GMT)
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weighted sound power level of 1 pico watt
Peer comment(s):
| agree |
Eva Karpouzi
5 mins
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thank you
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| agree |
Rahi Moosavi
7 mins
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thank you
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| agree |
Saleh Chowdhury, Ph.D.
45 mins
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thank you
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+4
6 mins
sound power level
PW means pico-watt for sound intensity, see the link i found below, HTH!
Orla
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Note added at 37 mins (2004-07-06 09:14:36 GMT)
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Could be wrong, I am not a sound/audio expert, but my take on the re part of the equation is that re refers to the radiation of the sound energy, as in how far does the sound of the air conditioner travel.
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Note added at 38 mins (2004-07-06 09:15:20 GMT)
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http://www.campanellaacoustics.com/faq.htm#basic
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Note added at 38 mins (2004-07-06 09:15:34 GMT)
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http://www.campanellaacoustics.com/faq.htm#basic
Orla
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Note added at 37 mins (2004-07-06 09:14:36 GMT)
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Could be wrong, I am not a sound/audio expert, but my take on the re part of the equation is that re refers to the radiation of the sound energy, as in how far does the sound of the air conditioner travel.
--------------------------------------------------
Note added at 38 mins (2004-07-06 09:15:20 GMT)
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http://www.campanellaacoustics.com/faq.htm#basic
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Note added at 38 mins (2004-07-06 09:15:34 GMT)
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http://www.campanellaacoustics.com/faq.htm#basic
Peer comment(s):
| agree |
Vicky Papaprodromou
6 mins
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| agree |
Saleh Chowdhury, Ph.D.
8 mins
|
| agree |
Vanda
: A power expressed in dB above the standard reference level of 1 picowatt.
17 mins
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| neutral |
airmailrpl
: dba ->sound power level
32 mins
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| agree |
Milena Sahakian
1 day 9 hrs
|
3 hrs
xx decibelios acústicos relativos a un picowatio
Las medidas en decibelios siempre expresan el cociente entre dos valores, la magnitud medida y un valor de referencia. 're' delante del un valor de referencia (a menudo van entre paréntesis) se añade tras el valor en decibelios cuando se quiere especificar inequívocamente dicho nivel de referencia.
're' quiere decir "referencia=", "relativo a", "respecto a"...
HTH
're' quiere decir "referencia=", "relativo a", "respecto a"...
HTH
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