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Author Topic: minimize noise at 80m from source  (Read 8491 times)

GeorgesAOUN

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minimize noise at 80m from source
« on: April 08, 2016, 08:10:36 am »

Dears,

Am new in this forum and I need some support for an issue we are currently facing with one of our installations.

We need to install a sound system on a Rooftop (Open air) for a pub/night-club, the problem is that there is a nearby Hotel at 80 meters direct line.

What would be the solution to have a quality sound at the club at a reasonable volume to run the parties without disturbing the hotel visitors?
we have tried several ways of installation but the sound at the hotel is very loud as if we are at the club,

can someone advise about any idea/solution please,

thanks,
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David Allred

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Re: minimize noise at 80m from source
« Reply #1 on: April 08, 2016, 09:46:27 am »

Absorb, deflect, or both.  A wall is functional, but maybe impractical if a "view" is part of the setting.

Planting trees (evergreens with tight branch formation) as fence takes a while, unless you transplant mature trees.

A second system delayed and aligned to be 180 degs out of phase (or polarity, choose your preferred term that will bring another 10 page discussion).
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GeorgesAOUN

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Re: minimize noise at 80m from source
« Reply #2 on: April 08, 2016, 10:45:50 am »

Thank you for your input,

The wall from the hotel direction is made as follows:
1.1m height concrete Wall and on top of it 1.1m height Glass as Fence (Double 8mm security glass).
total height is 2.2m,

does installation the speaker on the ground help?

Can you please elaborate more about the "second system delayed and aligned to be 180 degs out of phase"?
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Scott Carneval

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Re: minimize noise at 80m from source
« Reply #3 on: April 08, 2016, 11:44:26 am »

Where are your speakers located, and where are they aimed?

Have you considered locating your speakers on the side closest to the hotel, and then aiming them AWAY from the hotel?

2 speakers may not be ideal for 'pub' settings, but should work just fine at night when the venue is functioning as a 'nightclub'. You could run a smaller distributed system at lower volumes for 'pub' scenarios.
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Mac Kerr

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Re: minimize noise at 80m from source
« Reply #4 on: April 08, 2016, 12:01:16 pm »

A second system delayed and aligned to be 180 degs out of phase (or polarity, choose your preferred term that will bring another 10 page discussion).

And won't work.

Mac
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Keith Broughton

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Re: minimize noise at 80m from source
« Reply #5 on: April 08, 2016, 12:57:10 pm »

Can you be more specific about exactly what you can hear from the hotel?
Is it all the music, just the bass or both?
Different frequency bands need different solutions.
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Keith Broughton

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Re: minimize noise at 80m from source
« Reply #6 on: April 08, 2016, 12:58:34 pm »

Can you be more specific about exactly what you can hear from the hotel?
Is it all the music, just the bass or both?
How quiet does it have to be at the hotel to keep them happy?
Different frequency bands need different solutions.
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David Allred

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Re: minimize noise at 80m from source
« Reply #7 on: April 08, 2016, 12:58:42 pm »

And won't work.

Mac
I thought "one in a million shot" at best.

How about the "Cone of Silence" from GET SMART?
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Ivan Beaver

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Re: minimize noise at 80m from source
« Reply #8 on: April 08, 2016, 01:22:42 pm »

And won't work.

Mac
Exactly.  You can cancel "some" freq in some direction , but broadband is quite a different problem.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

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GeorgesAOUN

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Re: minimize noise at 80m from source
« Reply #9 on: April 09, 2016, 04:39:39 am »

Yes,

we tried it,

when we put the speaker on the ground directly near the wall the sound decreases slightly at the hotel, but if we put it 2 meters away from the wall even with the direction is opposite from the hotel the sound raises back again as if you are in the club.
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ProSoundWeb Community

Re: minimize noise at 80m from source
« Reply #9 on: April 09, 2016, 04:39:39 am »


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