Philips Streamium 544-9056 User Manual page 39

to the regular occurrence of compression and
rarification of air that we experience as sound.
Frequency Response
Is the range of frequencies that a speaker
reproduces, lowest frequency to the highest.
While the optimal normal is 20-20,000 Hz
(Hertz), the range of human hearing for
individuals is often much more restricted.
A good full-range speaker system however,
reproduces as much of this range as possible
to cover all variations. Individual drivers are
limited to reproduce only that part of the
spectrum for which they were made, so their
response is limited, but still a necessary point
to consider when designing a complete sound
system.
H
Hi-Fi (High Fidelity)
A method of sound reproduction that
emphasizes the highest possible adherence to
the exact character of the original sound. This
is a principal that must be paramount in every
stage of the recording, transportation, and
recreation of the signal to be fully operational.
It is usually the listener's equipment wherein
this objective is most seriously compromised.
Hz (Hertz)
Cycles per second, named after Heinrich
Hertz.
I
Impedance
The resistance to the flow of an electric
current in a circuit. This is effectively the
electrical load that a loudspeaker presents to
the amplifier which drives it and is measured
in ohms.
Incredible Surround Sound (Incr.Surr.)
An improved system that creates realistic,
three-dimensional sound fields. These sound
fields are usually achieved with multiple
speakers that are arranged around the listener.
Input sensitivity
SPL (sound pressure level) a speaker
produces, given one watt of power, measured
from a one-meter distance at a typical input
frequency (usually 1kHz unless otherwise
noted on the speaker).
Interface
A device or protocol which facilitates the
linking of any two devices or systems; or when
used as a verb ('to interface'), the process of
linking.
IP address
An IP (Internet Protocol) address is a unique
computer address that enables electronic
devices to communicate with and identify
each other.
K
Kbps
Kilobits per second. A digital-data-rate
measurement system which is often used
with highly compressed formats such as AAC,
DAB, MP3 etc. The higher the amount, the
better the quality generally is.
kHz (kilo Hertz)
1000Hz or 1000 cycles per second.
L
LCD (Liquid Crystal Display)
Probably the most common way to show
visual information on non-computer electronic
equipment.
Lossless compression
A system for reducing the number of data bits
(density) in a musical signal without corrupting
the original.
M
M4A
The audio file format used by Apple in their
iTunes Music Store often appears on your
EN
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