OVR SCCA Forum

Race Categories => Autocross => : Simi March 27, 2018, 09:04:54 AM



: Do we have any people who are good and sound systems?
: Simi March 27, 2018, 09:04:54 AM
We have two pretty decent (from what I know which is super limited) speakers at our disposal in the truck, but it seems like sound doesn't carry very far if you are in the pavilion it's great, but if you get to paddock or grid I think it gets sketchy, people who know more about sound systems have any ideas on how we can improve the situation since the PA is our primary mode of communication at events?


: Re: Do we have any people who are good and sound systems?
: RyanN March 27, 2018, 09:44:55 AM
Web stream the audio? 


: Re: Do we have any people who are good and sound systems?
: Rich Grunenwald March 27, 2018, 09:47:42 AM
Sounds like a question for the Sandbox.


: Re: Do we have any people who are good and sound systems?
: Simi March 27, 2018, 10:20:03 AM
Sounds like a question for the Sandbox.

While yes they will know more i'd want someone who knows a little bit about what we have maybe view it / consult before me half assedly asking the q on the interweb :)


: Re: Do we have any people who are good and sound systems?
: Rich Grunenwald March 27, 2018, 10:35:58 AM
Sounds like a question for the Sandbox.

While yes they will know more i'd want someone who knows a little bit about what we have maybe view it / consult before me half assedly asking the q on the interweb :)
Of course, I've never considered that a limiting factor...


: Re: Do we have any people who are good and sound systems?
: RandyT March 27, 2018, 05:13:29 PM
I've got a friend (he was the guy with the M5 that I drove last weekend) that has an outdoor home theater setup with some GIANT JBL outdoor speakers that might be able to assist us in how to address this challenge.  I'll pass it by him when I see him and see what his thoughts are since he's done a ton of research on this subject.

That note aside, the challenge seems to be the direction the speakers are facing.  The sound was fine if you were in the line of sight. Sound won't travel in all directions with just two speakers, so it may be as simple as adding more speakers to the system.  The power of the speakers will also make a difference but sound tends to be very directional.  The height of the speaker stands will also make a difference.  There may be some value in figuring out a way to mount the speakers higher using Toby as a mounting point.


: Re: Do we have any people who are good and sound systems?
: Brian March 28, 2018, 08:49:59 AM
I had a hand in the sourcing of our existing system (along with Jeff Kiesel whose family owns Carvin & is a long time national SCCA autox family on the west coast).

Along with some of the thoughts above, the speakers are quite effective in a 50' range +/-. Issues include: (1)that each speaker likely covers a 60-90* range (at most), (2)wind factors into both the range and the coverage, and (3)to have the audible volume at 50' it is unbearable at 5-10'.

Getting the speaker system up higher out of direct 'ear' height would help with the volume carrying more evenly across a site like NTR, even adding a single horn speaker on a long(er) speaker cable set up around where tech typically is (and at least 7' high, to make it not deafening) should cover ALL of paddock/grid pretty easily. These speakers look to be $30-70, and the club might still have the old one(s) around to try before buying new.. seem to see these on craigslist fairly frequently too.

Example:
(https://images-na.ssl-images-amazon.com/images/I/51XkxZtho%2BL._SX355_.jpg)


: Re: Do we have any people who are good and sound systems?
: Rich Grunenwald March 28, 2018, 11:17:18 AM
As I've thought about this, I wonder if there is a wireless (or Bluetooth) + powered speaker solution.  Of course, then you need power to the speaker also.

Similarly, some sort of FM radio broadcast solution or web streaming audio as mentioned.

But, I have no specific solutions. Just an idea guy...lousy implementer.


: Re: Do we have any people who are good and sound systems?
: Brian March 28, 2018, 11:45:42 AM
The FM radio broadcast was a lower cost & known reliable option as well..  Bluetooth doesn't have the distance & signal strength from what I've seen, maybe some wifi option (which would allow streaming audio & results, which AXware can support).


: Re: Do we have any people who are good and sound systems?
: AlanLGuy March 28, 2018, 11:18:05 PM
The biggest problem Iíve seen is communication with paddock/grid at NTR. I  think an additional speaker with a longer cord run thatís positioned facing the paddock would help immensely with this.

I think the new radios will solve most of our issue with communication with course workers.


: Re: Do we have any people who are good and sound systems?
: Simi April 11, 2018, 08:58:01 AM
So since we have some downtime should we be looking at procuring one of those speakers mentioned earlier?


: Re: Do we have any people who are good and sound systems?
: E. Campbell April 11, 2018, 12:32:16 PM
From 50í away the sound canít be higher than 98 decibels so....turn up the volume.


: Re: Do we have any people who are good and sound systems?
: Browncoat3000 April 12, 2018, 12:31:07 AM
In a past life I was house electrician in a theater, I worked with a lot of sound systems.

Someone mentioned using FM, the problem is that FM is finicky and prone to interference on any sort of scale. VHF and UHF based systems are more reliable, but more expensive.

This company, for example, makes systems that could be daisy chained together over multiple speakers:
http://www.anchoraudiostore.com/megavox.html

Amazon has some consumer grade units that start around $250 for a one or two speaker system that could be added to.

You could use the wireless system in parallel with the existing system.

The Tanoy style speakers tend to be directional, and unintelligible at a distance. This could be overcome with multiple locations, but now you have cables all over the course. If you want to stick with the wired system, then Iíd suggest something like this:
http://www.fullcompass.com/prod/086129-TOA-HX-5B-WP

You can adjust the range from 15 to 60 degrees of coverage, with a suitable driver (amp) you could place 3 or 4 around the corners of the pavilion and cover most of the site.


: Re: Do we have any people who are good and sound systems?
: Mr. Herdman April 12, 2018, 08:28:33 AM
Hereís a thought:

Is there any way we could live stream the announcing audio through an app of some sort? From there, it could be listened to through people phones ó> car speakers/Bluetooth speakers. Probably and easier alternative to broadcasting radio signal, and would give everyone access to the audio.


: Re: Do we have any people who are good and sound systems?
: Rich Grunenwald April 12, 2018, 11:39:34 AM
^^^^ This would be ideal.  Get us out of the hardware business.


: Re: Do we have any people who are good and sound systems?
: Browncoat3000 April 12, 2018, 08:29:15 PM
Well,
There is this:

WAVE Push-to-Talk (PTT)(5.12+) by MOTOROLA SOLUTIONS, INC

Works on any type of network.


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