AAERT CER Exam Questions & Answers 100% Correct

Methods of audio recording - ANSWER-Analog and digital Microphone - ANSWER-Converts acoustical energy that is sound into electrical signal that can be delivered to either an analog or digital device Path of digital audio - ANSWER-To change the analog signal to a digital signal it will need to pass through an analog to digital converter (digital mixer or A/D converter) Sample rate - ANSWER-Number of samples taken each second when recording sound. (44.1 kHz, 48 kHz, et cetera) Bit rate - ANSWER-the number of bits transferred or received per unit of time (usually 16 or 24 bits) Low sampling rate - ANSWER-Approximation High sampling rate - ANSWER-Smooth Digital mixer or A/D converter - ANSWER-The digital mixer, or A/D converter, will output the signal through one of a variety of connections such as USB, FireWire (IEEE 1394), serial, local computer bus, or Ethernet. Dynamic Microphone - ANSWER-(Moving coil) - made up of diaphragm, a coil, and a magnet. As acoustical energy hits against the diaphragm, which is a flat plate at the front of the microphone, it causes the coil that is attached to it to move back and forth over the top of the magnet. The movement of the coil over top of the magnet creates an electrical signal which travels through the wires within the microphone and eventually reaches your digital mixer or A/D converter. Condenser Microphone - ANSWER-Consists of a front plate (diaphragm), back plate, and a 48-volt power source. The front and back plate together create a capacitor. When acoustical energy hits the front plate of the capacitor, the distance between the front and back plate changes. The gap between these two plates is electrically charged. This charge is created by either an internal battery source or an external power source referred to as phantom power. Should you use microphones with batteries? - ANSWER-No. If a battery would die during use, you could have a gap in your recording, and you would need to interrupt the event you are reporting to fix this problem. Digital mixers and A/D converters act as - ANSWER-Phantom power source for condenser microphones Biggest