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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Installed Sound/Contracting => Topic started by: Brian Henson on September 04, 2014, 03:23:51 pm

Title: Speaker coverage rough estimate
Post by: Brian Henson on September 04, 2014, 03:23:51 pm
Understanding that a speaker's coverage pattern is not the same at all frequencies, and that the actual coverage pattern may differ from its listed specs:

Provided I have a seating area that is 40 feet wide at it's widest point (about 34 feet at the narrowest) and 25 feet deep, what sort of coverage pattern would I be looking at (again, just a rough estimate) to cover the entire area?

If I need to do a few more measurements please let me know.

EDIT: the seating is not "raised" or "graduated", every seat is the same height.
Title: Re: Speaker coverage rough estimate
Post by: Hayden J. Nebus on September 04, 2014, 04:31:34 pm
Understanding that a speaker's coverage pattern is not the same at all frequencies, and that the actual coverage pattern may differ from its listed specs:

Provided I have a seating area that is 40 feet wide at it's widest point (about 34 feet at the narrowest) and 25 feet deep, what sort of coverage pattern would I be looking at (again, just a rough estimate) to cover the entire area?

If I need to do a few more measurements please let me know.

EDIT: the seating is not "raised" or "graduated", every seat is the same height.

Where is the loudspeaker in relation to the seating area? 
Title: Re: Speaker coverage rough estimate
Post by: g'bye, Dick Rees on September 04, 2014, 04:33:23 pm
Where is the loudspeaker in relation to the seating area?

Two doors down on your left...
Title: Re: Speaker coverage rough estimate
Post by: Hayden J. Nebus on September 04, 2014, 04:46:04 pm
Two doors down on your left...

in the mens lavatory...

Title: Re: Speaker coverage rough estimate
Post by: g'bye, Dick Rees on September 04, 2014, 04:51:51 pm


Provided I have a seating area that is 40 feet wide at it's widest point (about 34 feet at the narrowest) and 25 feet deep, what sort of coverage pattern would I be looking at (again, just a rough estimate) to cover the entire area?


Where is the sky blue?

(This is fun.)
Title: Re: Speaker coverage rough estimate
Post by: Corey Scogin on September 04, 2014, 05:20:04 pm
Provided I have a seating area that is 40 feet wide at it's widest point (about 34 feet at the narrowest) and 25 feet deep, what sort of coverage pattern would I be looking at (again, just a rough estimate) to cover the entire area?

If I need to do a few more measurements please let me know.

This information is needed:
-the shape of the audience area. Is the widest part closer or further from the speaker or in the middle?
-the distance from the speaker to the front row.
-the height the speaker will be mounted.

Given that information, some trigonometry will determine what coverage pattern will keep everyone within the rated -6dB area of the high frequency section.
Title: Re: Speaker coverage rough estimate
Post by: Brian Henson on September 04, 2014, 06:08:28 pm
The distance of the speaker from the front row could change depending on the best place for it to be installed.

I will get a measurement of the ceiling height.

The seating area is narrower toward the front row and wider toward the back row.
Title: Re: Speaker coverage rough estimate
Post by: Corey Scogin on September 04, 2014, 06:22:12 pm
The distance of the speaker from the front row could change depending on the best place for it to be installed.

You'll want it in front any open mics.  You need to determine a range for mounting locations.  That range will be limited by mic placement and the front row of the seating area.

Title: Re: Speaker coverage rough estimate
Post by: Scott Holtzman on September 04, 2014, 06:25:41 pm
The distance of the speaker from the front row could change depending on the best place for it to be installed.

I will get a measurement of the ceiling height.

The seating area is narrower toward the front row and wider toward the back row.

What content will be amplified and at what expected level?  What frequency response do you want (for instance if a dance club the base requirements will change).

My guess is this is a church?

Have you considered hiring an expert, communicating your requirements and having the system designed?  I guess the second option is asking vague questions in a public forum full of strangers.  Both are bound to produce similar results.

Title: Re: Speaker coverage rough estimate
Post by: Ivan Beaver on September 04, 2014, 07:36:49 pm
Just to add a couple of pieces of more information needed:

Is this to be a single speaker or multiples?

How loud does it need to be?

What is the budget and what all does that need to include?

Where can the speaker be located?  Due to weight-ceiling structure-wire paths etc.

Photos or drawings would really help
Title: Re: Speaker coverage rough estimate
Post by: Brian Henson on September 04, 2014, 08:43:44 pm
This is just for my own education, I'm not asking for a consultation (at least not yet) or a design (yet). Just gathering information.

I'll be able to get the measurements this weekend.