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Author Topic: minimize noise at 80m from source  (Read 8021 times)

David Allred

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Re: minimize noise at 80m from source
« Reply #20 on: April 11, 2016, 01:41:04 pm »

This might be of interest

http://www.sseaudiogroup.com/write/PDF%20Library/PDF%20Reports/VC-SSE-MLA-K1-TEST.pdf

So the results of the test are that large fans should be used to blow the sound away from the hotel?
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Lee Buckalew

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Re: minimize noise at 80m from source
« Reply #21 on: April 11, 2016, 03:11:15 pm »

This might be of interest

http://www.sseaudiogroup.com/write/PDF%20Library/PDF%20Reports/VC-SSE-MLA-K1-TEST.pdf

So from these tests, both K1 and MLA would provide very significant reductions at 50m behind the arrays.
The tests show a 105dB/SPL-A at 50m in front, on axis and a 79 or 80 dB/SPL level 50m behind the arrays.

Estimates would be nearly a 40dB/SPL reduction.

Lee
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lindsay Dean

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Re: minimize noise at 80m from source
« Reply #22 on: April 11, 2016, 03:19:58 pm »

@?
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Lee Buckalew

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Re: minimize noise at 80m from source
« Reply #23 on: April 11, 2016, 03:31:14 pm »

@?

If that was a reply to me I mean a nearly 40 dB/SPL-A reduction from an estimated level at the arrays to a point 50m behind the arrays.  I only saw a normalized level at 50m in front of the arrays and a level at 50m behind but no level at the arrays themselves, hence the "estimated".


Edit to add on axis performance notes.

If we look at on axis performance vs. theoretical levels we see that both systems performed within a + or - window of 0.75dB/SPL-A weighted of each other and both dropped significantly below the theoretical SPL level at distances beyond their targets when considering both distance and air absorption.


Lee
« Last Edit: April 12, 2016, 08:24:41 am by Lee Buckalew »
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GeorgesAOUN

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Re: minimize noise at 80m from source
« Reply #24 on: April 12, 2016, 03:11:06 am »

So the results of the test are that large fans should be used to blow the sound away from the hotel?

So you mean we should install the speakers in the opposite direction of the hotel and also install large fans behind it?
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Scott Carneval

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minimize noise at 80m from source
« Reply #25 on: April 12, 2016, 07:40:04 am »

So you mean we should install the speakers in the opposite direction of the hotel

Yes

Quote
and also install large fans behind it?

No. But if you do this please take pictures and/or video and post here.
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David Allred

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Re: minimize noise at 80m from source
« Reply #26 on: April 12, 2016, 07:56:07 am »

So you mean we should install the speakers in the opposite direction of the hotel and also install large fans behind it?

Fans sufficient to accomplish the task would then become the noise problem for the hotel and be a major safety hazard.   ;)
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g'bye, Dick Rees

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Re: minimize noise at 80m from source
« Reply #27 on: April 12, 2016, 09:56:21 am »

Georges...

No matter what you do in such a situation you WILL get complaints due to the nature of intelligible /coherent sound vs diffuse/broadband sound such as white noise.  Pulsing, rhythmic sound such as music will be perceived as "loud" simply because the nature of the rhythm attracts the ear, EVEN AT AN AVERAGE SPL MUCH LESS THAN WHITE NOISE.

The only real recourse after you have done your best to tame your levels as much as possible is to work with the neighbors in good faith and within any existing statutes governing sound levels and times of operations.

In the end, such issues fall on subjective perceptions rather than objective, measurable criteria.  It's more diplomacy than anything else.

See if you can give the hotel guests passes/discounts/coupons so the hotel can become an ally rather than an adversary.
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David Allred

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Re: minimize noise at 80m from source
« Reply #28 on: April 12, 2016, 01:02:20 pm »


See if you can give the hotel guests passes/discounts/coupons so the hotel can become an ally rather than an adversary.

Good comment.  Honey vs. vinegar
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lindsay Dean

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Re: minimize noise at 80m from source
« Reply #29 on: April 12, 2016, 02:12:21 pm »

    white noise directed toward the hotel
 would help, depending the level needed and on whether they prefer it over music.
probably would get "air noise" complaints..............oh well
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