November 2007
Intermediate to advanced
736 pages
46h 32m
English
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CARBON MICROPHONES
For a telephone system important requirements are (i) the microphone shall be of convenient size; (ii) capable of mass production at low cost while possessing high sensitivity to operate from a simple battery; (iii) its performance must be stable and adequate to provide intelligible speech and articulation and; (iv) it need not necessarily include the higher harmonic frequencies for reproducing.
On the other hand, microphones used for purposes such as radio broadcasting are relatively few in number and their cost is not a primary consideration: high fidelity reproduction up to about 10,000 Hz for natural speech and music transmission is essential.
An inset pattern of carbon granule microphone is in general use for telephone ...
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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.