Glossary

0-9
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
GLOSSARY MAINPAGE

O

OHM (Ohm) - A unit used to identify the resistance in an electrical current that is used here to identify the Impedance of speakers. High Ohms values mean that resistance is low and a small signal can drive the speaker efficiently, while a low Ohms value means that resistance is high and a stronger, less efficient signal is required.  
OPTICAL - Technology using light pulses to transmit information. Optical cables use these pulses to represent the 'on' and 'off' pulses of a digital signal. See also Coaxial.  
OVERSAMPLING - A process used in Digital-to-Analogue Converters to increase the quality of the output signal. The digital data is read from the CD, DVD or Minidisc a number of times, at a rate faster than the speed of the outputted audio sound. This process ensures that and errors or missed information will be read on the next Sample and inserted into the main signal before it is converted into analogue for amplification.