November 2007
Intermediate to advanced
736 pages
46h 32m
English
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HORNS
Outdoor speakers need the maxiumum efficiency, economic feasibility, and directivity so that sound is not wasted in directions where it is not needed or wanted. For these reasons, horns have become almost universal for outdoor installations: they provide natural weather protection; they are relatively high in efficiency; and they have a degree of directionality dependent on the constants in their design.
Horns come in all sizes and shapes, and are made of a variety of materials, metallic and plastic. Most of the smaller ones, suitable for paging, outdoor intercom, or low-level distribution, come with the driver unit as an integral part. The larger ones have removable drivers so that power can be increased, where necessary, by fitting a ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.