Xoro HXS 532 - Инструкция (Страница 22)

21
ADDENDUM
SOUND GLOSSARY
as much as 75 dB.
When used in music, refers to the expression of a
performance with varying degree of loudness and
softness.
The loudspeaker parameter that gives the level of
sound output when measured at a prescribed
distance with a standard level of electrical energy
fed into the speaker.
Electronic set of filters used to boost or attenuate
certain frequencies.
How extended a range of frequencies the device
can reproduce accurately. Bass extension refers to
how low a frequency tone will the system
reproduce, high-frequency extension refers to how
high in frequency will the system play.
An electrical circuit or mechanical device that
removes or attenuates energy at certain
frequencies. An electrical circuit or mechanical
device that removes or attenuates energy at
certain frequencies.
The faithful reproduction of an audio signal;
specifically, the variations in output level of less
than 1 dB above or below a median level over the
audio spectrum.
The natural resonant frequency of a driver when
operating outside an enclosure.
he number of complete cycles that a sound wave
goes through in each second. Unit used is Hertz,
abbreviated to Hz, although some countries still use
the older term 'cycles per second' (cps). Humans
perceive frequency subjectively as pitch (eg: 440Hz
= A). The range of human hearing is commonly
given as 20
20,000Hz (20Hz 20kHz).
A speaker designed to reproduce all or most of the
sound spectrum.
The amount by which an amplifier increases the
DYNAMICS
EFFICIANCY RATING
QUALIZER
EXTENSION
ILTER
LAT ESPONSE
REE AIR ESONANCE
REQUENCY
ULL-RANGE
GAIN
E
F
F R
F R
F
F
T
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power of a signal, indicated either in dB (e.g. Gain =
+12dB), or as a multiplier (e.g. Gain = x4). The
function of a volume control.
The ability of an amp to go beyond its rated power for
short durations in order to reproduce musical peaks
without distortion. This capability is often dependent
on the power supply used in the design.
A unit of measurement denoting frequency, originally
measured as Cycles Per Second, (CPS): 20 Hz = 20
CPS. Kilohertz (kHz) are hertz measured in multiples
of 1,000.
A circuit that discriminates between high and low
frequencies and allows only the high frequencies to
pass
An audio system designed to reproduce the theater
sound experience while viewing film at home. Minimally
consisting of a Dolby Pro Logic® surround sound
receiver, left and right front speakers, a center channel
speaker, and two surround speakers. These plus
optional subwoofer(s), surround speaker(s), and digital
formats such as Dolby Digital® can enhance the
viewing experience by drastically improving the sound
quality of movie soundtracks.
Audio electronic noise that has a steady low
frequency pitch.
s a measure of electrical resistance specified in
ohms. Speakers are commonly listed as 4 or 8 hm
but speakers are reactive devices and a nominal 8
ohm speaker might measure from below 4
hm to 60
or more hms over its frequency range. This varying
impedance curve is different for each speaker model
and makes it impossible to design a really effective
"generic" speaker level high-pass filter. Active devices
like amplifiers typically have an input impedance
between about 10,000-100,000 ohms and the
impedance is the same regardless of frequency.
Distortion caused by too great an input signal being
sent to an amplifier or preamplifier. It is not affected
by volume control settings.
A tendency towards lack of synchronization caused
H
H (Hz)
H P F
H T
H
I O D
EADROOM
ERTZ
IGH ASS ILTER
OME HEATER
UM
IMPEDANCE
NPUT VERLOAD ISTORTION
JITTER
.
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