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How to determine the sound power from a night club?
3

How to determine the sound power from a night club?

How to determine the sound power from a night club?

(OP)
Hi, does anyone know how could i calculate the sound power from a night club? The problem is that the type of noise vary in time.

RE: How to determine the sound power from a night club?

A sound intensity meter? Bruel & Kjaer are one manufacturer you might want to check out.
  

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If we learn from our mistakes I'm getting a great education!
 

RE: How to determine the sound power from a night club?

If the sound from a night club disturbs me, I usually go there myself. If you can't beat them - join them.

Much worse with buzzing pole-mounted transformers. Joining them? Naa..

Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: How to determine the sound power from a night club?

(OP)
I mean in terms of methodology...

RE: How to determine the sound power from a night club?

Sorry for my last post. We had been discussing transformers in another thread. I see that you are new here and I hope that you do not think that we always are like that.

Do you mean to measure actual power? In watts? Total emitted power?

Or are you satisfied with decibels? At selected spots?

In the former case, I have no idea. In the latter case, Scotty just gave you a good answer. Have a look at the Bruel&Kjaer site for tons of information. They have done this from dawn of time - almost.

 

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: How to determine the sound power from a night club?

Do you mean the sound power from the sound system or the sound power radiated from the whole building to the outside?

M

--
Dr Michael F Platten

RE: How to determine the sound power from a night club?

(OP)
I would like to calculate the sound power (Lw) from a night club in octave bands. It is necessary for me because i use ISO 9613-2 as the mathematical basis of an app i developed in a Geographic Information System (GIS) for the generation of noise maps. One of the input data in the app is the octave-band sound power of the noise source.
...by the way...its ok for the jokes guys...people from Brazil is all about fun!!  

RE: How to determine the sound power from a night club?

(OP)
I forgot to say i would like to calculate the sound power level from sound pressure level from measure in the study area.

RE: How to determine the sound power from a night club?

Calibrate a microphone. Go to the club. Collect data.
PSD it.

The output may or may not be useful. Depending on what the next step you decide to take may be.  

peace
Fe

RE: How to determine the sound power from a night club?

I assume your nightclub is a stand-alone building - otherwise things might be tricky

I would suggest an intensity probe rather than a microphone. You will need to get on the roof too to measure the radiation from there.

M

--
Dr Michael F Platten

RE: How to determine the sound power from a night club?

May I add a word of caution: Noise from a night club is probably due to music, and might have a strong low-frequency content. Precise measurement of low-frequency noise/intensity (say, below 100 Hz) is not an easy task in outdoor conditions...  

RE: How to determine the sound power from a night club?

Yes, Vibac has a point. Follow the standard for intensity measurement very carefully with regard to calibration and PU index to make sure you know at what frequencies you are getting valid data.

M

--
Dr Michael F Platten

RE: How to determine the sound power from a night club?

(OP)
Guys there are a lot of good discussions here...thank you very for your replies. Please keep posting info here. I am very grateful.

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