Chapter 8 Lesson 3 - Multimedia Peripherals Flashcards
What is a webcam?
A digital camera built into a computing device
What are 2 ways to disable a webcam/camera?
- Disconnect it if it’s external
- Disable it in Privacy & Security
How does a microphone record sound?
detects, turns into
It detects vibrations and converts it into electrical signals
A set of speakers can include anywhere from __ to ___ individual speakers, all connected to each other somehow
2 to 7 individual speakers
If there are more than 2 speakers, how do they connect to each other?
Typically through a central gathering point like a subwoofer which connects to the PC on all the other speakers’ behalf
What’s the most common reason for problems with headphones or microphones?
the wrong
The device isn’t selected as the default
What’s the most common variety of scanner?
flatbed scanner
What is the glass scanner surface called?
eat
platen
What are 3 ways to control a scanner?
built, provided by, ordering out options
- Built-in scanner utility in OS (may not have full support for specific device features)
- Drivers and utilities provided by the manufacturer (quality and updates vary)
- Device’s built-in menus (esp for multifunction ones, can scan directly to a memory card or a network share)
What does OCR stand for?
Optical character recognition
What does optical character recognition (OCR) do? (scanner software)
Attempts to convert a scanned document into text that can be edited with word-processing software
When choosing a scanner, what are 4 factors to keep in mind?
Aaliyah, ocean-choices, ocean-choices, the flash
- Resolution (number of pixels it can capture)
- Color-depth (number of color choices for each pixel, at least 32-bit)
- Greyscale depth (number of grey choices for each pixel in B&W)
- Scan speed (time it takes to scan a full page)
High-quality scanners don’t introduce as much ____ into the scan as lower-quality electronics
noise
